diff --git a/lldb/test/benchmarks/continue/TestBenchmarkContinue.py b/lldb/test/benchmarks/continue/TestBenchmarkContinue.py
index 40e9c6d90e8f..4f0af9aed522 100644
--- a/lldb/test/benchmarks/continue/TestBenchmarkContinue.py
+++ b/lldb/test/benchmarks/continue/TestBenchmarkContinue.py
@@ -13,7 +13,7 @@ class TestBenchmarkContinue(BenchBase):
     mydir = TestBase.compute_mydir(__file__)
 
     @benchmarks_test
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Benchmark different ways to continue a process"""
diff --git a/lldb/test/driver/batch_mode/TestBatchMode.py b/lldb/test/driver/batch_mode/TestBatchMode.py
index 06af9d2e8ffe..02f4ec6d9c47 100644
--- a/lldb/test/driver/batch_mode/TestBatchMode.py
+++ b/lldb/test/driver/batch_mode/TestBatchMode.py
@@ -15,7 +15,7 @@ class DriverBatchModeTest (TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @unittest2.expectedFailure("<rdar://problem/18684124>, lldb doesn't reliably print the prompt when run under pexpect")
     @dsym_test
     def test_driver_batch_mode_with_dsym(self):
diff --git a/lldb/test/expression_command/call-function/TestCallStdStringFunction.py b/lldb/test/expression_command/call-function/TestCallStdStringFunction.py
index e7ebbe0e639d..c36577a54133 100644
--- a/lldb/test/expression_command/call-function/TestCallStdStringFunction.py
+++ b/lldb/test/expression_command/call-function/TestCallStdStringFunction.py
@@ -18,7 +18,7 @@ class ExprCommandCallFunctionTestCase(TestBase):
         self.line = line_number('main.cpp',
                                 '// Please test these expressions while stopped at this line:')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @expectedFailureDarwin(16361880) # <rdar://problem/16361880>, we get the result correctly, but fail to invoke the Summary formatter.
     def test_with_dsym(self):
diff --git a/lldb/test/expression_command/call-function/TestCallStopAndContinue.py b/lldb/test/expression_command/call-function/TestCallStopAndContinue.py
index d7e837a49430..dcd691c8ca6a 100644
--- a/lldb/test/expression_command/call-function/TestCallStopAndContinue.py
+++ b/lldb/test/expression_command/call-function/TestCallStopAndContinue.py
@@ -20,7 +20,7 @@ class ExprCommandCallStopContinueTestCase(TestBase):
         self.func_line = line_number ('main.cpp', 
                                 '{ 5, "five" }')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @expectedFailureDarwin("llvm.org/pr20274") # intermittent failure on MacOSX
     def test_with_dsym(self):
diff --git a/lldb/test/expression_command/call-restarts/TestCallThatRestarts.py b/lldb/test/expression_command/call-restarts/TestCallThatRestarts.py
index c6c4af2bb17e..85919a86b530 100644
--- a/lldb/test/expression_command/call-restarts/TestCallThatRestarts.py
+++ b/lldb/test/expression_command/call-restarts/TestCallThatRestarts.py
@@ -19,7 +19,7 @@ class ExprCommandThatRestartsTestCase(TestBase):
         self.main_source_spec = lldb.SBFileSpec (self.main_source)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @skipIfDarwin # llvm.org/pr19246: intermittent failure
     def test_with_dsym(self):
diff --git a/lldb/test/expression_command/call-throws/TestCallThatThrows.py b/lldb/test/expression_command/call-throws/TestCallThatThrows.py
index 65380cc02dba..8d54e2687710 100644
--- a/lldb/test/expression_command/call-throws/TestCallThatThrows.py
+++ b/lldb/test/expression_command/call-throws/TestCallThatThrows.py
@@ -19,14 +19,14 @@ class ExprCommandWithThrowTestCase(TestBase):
         self.main_source_spec = lldb.SBFileSpec (self.main_source)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test calling a function that throws and ObjC exception."""
         self.buildDsym()
         self.call_function()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin due to ObjC test case")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf(self):
         """Test calling a function that throws and ObjC exception."""
diff --git a/lldb/test/expression_command/formatters/TestFormatters.py b/lldb/test/expression_command/formatters/TestFormatters.py
index 4a78754d1895..4893bd2d01b6 100644
--- a/lldb/test/expression_command/formatters/TestFormatters.py
+++ b/lldb/test/expression_command/formatters/TestFormatters.py
@@ -18,7 +18,7 @@ class ExprFormattersTestCase(TestBase):
         self.line = line_number('main.cpp',
                                 '// Stop here')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test expr + formatters for good interoperability."""
diff --git a/lldb/test/expression_command/persist_objc_pointeetype/TestPersistObjCPointeeType.py b/lldb/test/expression_command/persist_objc_pointeetype/TestPersistObjCPointeeType.py
index eb771f888f71..f7af60c43914 100644
--- a/lldb/test/expression_command/persist_objc_pointeetype/TestPersistObjCPointeeType.py
+++ b/lldb/test/expression_command/persist_objc_pointeetype/TestPersistObjCPointeeType.py
@@ -17,14 +17,14 @@ class PersistObjCPointeeType(TestBase):
         # Find the line number to break for main.cpp.
         self.line = line_number('main.m','// break here')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test that we can p *objcObject"""
         self.buildDsym()
         self.do_my_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin due to ObjC test case")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf(self):
         """Test that we can p *objcObject"""
diff --git a/lldb/test/expression_command/po_verbosity/TestPoVerbosity.py b/lldb/test/expression_command/po_verbosity/TestPoVerbosity.py
index 1a6abfd403ed..dbb9daa8d048 100644
--- a/lldb/test/expression_command/po_verbosity/TestPoVerbosity.py
+++ b/lldb/test/expression_command/po_verbosity/TestPoVerbosity.py
@@ -18,14 +18,14 @@ class PoVerbosityTestCase(TestBase):
         self.line = line_number('main.m',
                                 '// Stop here')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test that the po command acts correctly."""
         self.buildDsym()
         self.do_my_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin due to ObjC test case")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf(self):
         """Test that the po command acts correctly."""
diff --git a/lldb/test/expression_command/timeout/TestCallWithTimeout.py b/lldb/test/expression_command/timeout/TestCallWithTimeout.py
index 304b8fd917a7..954ebf967ecf 100644
--- a/lldb/test/expression_command/timeout/TestCallWithTimeout.py
+++ b/lldb/test/expression_command/timeout/TestCallWithTimeout.py
@@ -19,7 +19,7 @@ class ExprCommandWithTimeoutsTestCase(TestBase):
         self.main_source_spec = lldb.SBFileSpec (self.main_source)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test calling std::String member function."""
diff --git a/lldb/test/expression_command/two-files/TestObjCTypeQueryFromOtherCompileUnit.py b/lldb/test/expression_command/two-files/TestObjCTypeQueryFromOtherCompileUnit.py
index 2314ad82c4ac..9f3a18d6af09 100644
--- a/lldb/test/expression_command/two-files/TestObjCTypeQueryFromOtherCompileUnit.py
+++ b/lldb/test/expression_command/two-files/TestObjCTypeQueryFromOtherCompileUnit.py
@@ -20,14 +20,14 @@ class ObjCTypeQueryTestCase(TestBase):
         self.line = line_number('main.m',
                                 "// Set breakpoint here, then do 'expr (NSArray*)array_token'.")
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """The expression parser's type search should be wider than the current compilation unit."""
         self.buildDsym()
         self.type_query_from_other_cu()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf(self):
         """The expression parser's type search should be wider than the current compilation unit."""
diff --git a/lldb/test/functionalities/abbreviation/TestAbbreviations.py b/lldb/test/functionalities/abbreviation/TestAbbreviations.py
index fbf8171c316e..6929d2374849 100644
--- a/lldb/test/functionalities/abbreviation/TestAbbreviations.py
+++ b/lldb/test/functionalities/abbreviation/TestAbbreviations.py
@@ -13,7 +13,7 @@ class AbbreviationsTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     @expectedFailureFreeBSD("llvm.org/pr22611 thread race condition breaks prompt setting")
-    @unittest2.skipIf(sys.platform.startswith("win32"), "one-shot script commands deadlock on Windows.")
+    @skipIfWindows # one-shot script commands deadlock on Windows.
     def test_nonrunning_command_abbreviations (self):
         self.expect("ap script",
                     startstr = "The following built-in commands may relate to 'script':",
@@ -78,7 +78,7 @@ class AbbreviationsTestCase(TestBase):
         self.runCmd (r'''sc print "\n\n\tHello!\n"''')
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/abbreviation/TestCommonShortSpellings.py b/lldb/test/functionalities/abbreviation/TestCommonShortSpellings.py
index ec322db1c2d1..f653e08e7375 100644
--- a/lldb/test/functionalities/abbreviation/TestCommonShortSpellings.py
+++ b/lldb/test/functionalities/abbreviation/TestCommonShortSpellings.py
@@ -13,7 +13,7 @@ class CommonShortSpellingsTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/alias/TestAliases.py b/lldb/test/functionalities/alias/TestAliases.py
index b49fe5d7f808..92251e502201 100644
--- a/lldb/test/functionalities/alias/TestAliases.py
+++ b/lldb/test/functionalities/alias/TestAliases.py
@@ -12,7 +12,7 @@ class AliasTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/asan/TestMemoryHistory.py b/lldb/test/functionalities/asan/TestMemoryHistory.py
index c63b70e3cf39..377e453809bd 100644
--- a/lldb/test/functionalities/asan/TestMemoryHistory.py
+++ b/lldb/test/functionalities/asan/TestMemoryHistory.py
@@ -19,7 +19,7 @@ class AsanTestCase(TestBase):
     @dsym_test
     @skipIfRemote
     @skipUnlessCompilerRt
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_with_dsym (self):
         compiler = self.findBuiltClang ()
         self.buildDsym (None, compiler)
diff --git a/lldb/test/functionalities/asan/TestReportData.py b/lldb/test/functionalities/asan/TestReportData.py
index 3ec992c0e87a..235ba037d695 100644
--- a/lldb/test/functionalities/asan/TestReportData.py
+++ b/lldb/test/functionalities/asan/TestReportData.py
@@ -20,7 +20,7 @@ class AsanTestReportDataCase(TestBase):
     @dsym_test
     @skipIfRemote
     @skipUnlessCompilerRt
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_with_dsym (self):
         compiler = self.findBuiltClang ()
         self.buildDsym (None, compiler)
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommand.py b/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommand.py
index 3a3156bf2035..796967802871 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommand.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommand.py
@@ -18,7 +18,7 @@ class BreakpointCommandTestCase(TestBase):
         cls.RemoveTempFile("output.txt")
         cls.RemoveTempFile("output2.txt")
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test a sequence of breakpoint command add, list, and delete."""
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommandsFromPython.py b/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommandsFromPython.py
index 164b42a2ab44..7fab045bfe52 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommandsFromPython.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_command/TestBreakpointCommandsFromPython.py
@@ -14,7 +14,7 @@ class PythonBreakpointCommandSettingTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
     my_var = 10
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_out_with_dsym_python(self):
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_command/TestRegexpBreakCommand.py b/lldb/test/functionalities/breakpoint/breakpoint_command/TestRegexpBreakCommand.py
index 055ca4cf2a14..ca95f36e8387 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_command/TestRegexpBreakCommand.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_command/TestRegexpBreakCommand.py
@@ -12,7 +12,7 @@ class RegexpBreakCommandTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test _regexp-break command."""
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_conditions/TestBreakpointConditions.py b/lldb/test/functionalities/breakpoint/breakpoint_conditions/TestBreakpointConditions.py
index ad8c295be3b8..7a6a2c158d5b 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_conditions/TestBreakpointConditions.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_conditions/TestBreakpointConditions.py
@@ -12,21 +12,21 @@ class BreakpointConditionsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_breakpoint_condition_with_dsym_and_run_command(self):
         """Exercise breakpoint condition with 'breakpoint modify -c <expr> id'."""
         self.buildDsym()
         self.breakpoint_conditions()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_breakpoint_condition_inline_with_dsym_and_run_command(self):
         """Exercise breakpoint condition inline with 'breakpoint set'."""
         self.buildDsym()
         self.breakpoint_conditions(inline=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_breakpoint_condition_with_dsym_and_python_api(self):
@@ -35,14 +35,14 @@ class BreakpointConditionsTestCase(TestBase):
         self.breakpoint_conditions_python()
 
     @dwarf_test
-    @unittest2.skipIf(sys.platform.startswith("win32"), "Requires EE to support COFF on Windows (http://llvm.org/pr22232)")
+    @skipIfWindows # Requires EE to support COFF on Windows (http://llvm.org/pr22232)
     def test_breakpoint_condition_with_dwarf_and_run_command(self):
         """Exercise breakpoint condition with 'breakpoint modify -c <expr> id'."""
         self.buildDwarf()
         self.breakpoint_conditions()
 
     @dwarf_test
-    @unittest2.skipIf(sys.platform.startswith("win32"), "Requires EE to support COFF on Windows (http://llvm.org/pr22232)")
+    @skipIfWindows # Requires EE to support COFF on Windows (http://llvm.org/pr22232)
     def test_breakpoint_condition_inline_with_dwarf_and_run_command(self):
         """Exercise breakpoint condition inline with 'breakpoint set'."""
         self.buildDwarf()
@@ -50,7 +50,7 @@ class BreakpointConditionsTestCase(TestBase):
 
     @python_api_test
     @dwarf_test
-    @unittest2.skipIf(sys.platform.startswith("win32"), "Requires EE to support COFF on Windows (http://llvm.org/pr22232)")
+    @skipIfWindows # Requires EE to support COFF on Windows (http://llvm.org/pr22232)
     def test_breakpoint_condition_with_dwarf_and_python_api(self):
         """Use Python APIs to set breakpoint conditions."""
         self.buildDwarf()
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_ids/TestBreakpointIDs.py b/lldb/test/functionalities/breakpoint/breakpoint_ids/TestBreakpointIDs.py
index 89d90362eabc..23d7e8a88846 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_ids/TestBreakpointIDs.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_ids/TestBreakpointIDs.py
@@ -12,7 +12,7 @@ class BreakpointIDTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_ignore_count/TestBreakpointIgnoreCount.py b/lldb/test/functionalities/breakpoint/breakpoint_ignore_count/TestBreakpointIgnoreCount.py
index 506ac167f4d1..7655af396abc 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_ignore_count/TestBreakpointIgnoreCount.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_ignore_count/TestBreakpointIgnoreCount.py
@@ -12,14 +12,14 @@ class BreakpointIgnoreCountTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Exercise breakpoint ignore count with 'breakpoint set -i <count>'."""
         self.buildDsym()
         self.breakpoint_ignore_count()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
diff --git a/lldb/test/functionalities/breakpoint/breakpoint_locations/TestBreakpointLocations.py b/lldb/test/functionalities/breakpoint/breakpoint_locations/TestBreakpointLocations.py
index 79c6a4ccdcec..7cf4e8129d6c 100644
--- a/lldb/test/functionalities/breakpoint/breakpoint_locations/TestBreakpointLocations.py
+++ b/lldb/test/functionalities/breakpoint/breakpoint_locations/TestBreakpointLocations.py
@@ -12,7 +12,7 @@ class BreakpointLocationsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test breakpoint enable/disable for a breakpoint ID with multiple locations."""
diff --git a/lldb/test/functionalities/breakpoint/cpp/TestCPPBreakpoints.py b/lldb/test/functionalities/breakpoint/cpp/TestCPPBreakpoints.py
index d3b2331412b2..c85758df97a6 100644
--- a/lldb/test/functionalities/breakpoint/cpp/TestCPPBreakpoints.py
+++ b/lldb/test/functionalities/breakpoint/cpp/TestCPPBreakpoints.py
@@ -12,7 +12,7 @@ class TestCPPBreakpoints(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/breakpoint/cpp_exception/TestCPPExceptionBreakpoint.py b/lldb/test/functionalities/breakpoint/cpp_exception/TestCPPExceptionBreakpoint.py
index 9324a59f7763..1802dceca62b 100644
--- a/lldb/test/functionalities/breakpoint/cpp_exception/TestCPPExceptionBreakpoint.py
+++ b/lldb/test/functionalities/breakpoint/cpp_exception/TestCPPExceptionBreakpoint.py
@@ -14,7 +14,7 @@ class TestCPPExceptionBreakpoint (TestBase):
     mydir = TestBase.compute_mydir(__file__)
     my_var = 10
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_cpp_exception_breakpoint (self):
diff --git a/lldb/test/functionalities/breakpoint/dummy_target_breakpoints/TestBreakpointsWithNoTargets.py b/lldb/test/functionalities/breakpoint/dummy_target_breakpoints/TestBreakpointsWithNoTargets.py
index f694b1df9e76..c162857b3926 100644
--- a/lldb/test/functionalities/breakpoint/dummy_target_breakpoints/TestBreakpointsWithNoTargets.py
+++ b/lldb/test/functionalities/breakpoint/dummy_target_breakpoints/TestBreakpointsWithNoTargets.py
@@ -12,7 +12,7 @@ class BreakpointInDummyTarget (TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test breakpoint set before we have a target. """
diff --git a/lldb/test/functionalities/breakpoint/inlined_breakpoints/TestInlinedBreakpoints.py b/lldb/test/functionalities/breakpoint/inlined_breakpoints/TestInlinedBreakpoints.py
index 8c8a92865fde..ec5e2f3e6968 100644
--- a/lldb/test/functionalities/breakpoint/inlined_breakpoints/TestInlinedBreakpoints.py
+++ b/lldb/test/functionalities/breakpoint/inlined_breakpoints/TestInlinedBreakpoints.py
@@ -14,7 +14,7 @@ class InlinedBreakpointsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test 'b basic_types.cpp:176' does break (where int.cpp includes basic_type.cpp)."""
diff --git a/lldb/test/functionalities/breakpoint/objc/TestObjCBreakpoints.py b/lldb/test/functionalities/breakpoint/objc/TestObjCBreakpoints.py
index 0b48b48d3119..1c8237991387 100644
--- a/lldb/test/functionalities/breakpoint/objc/TestObjCBreakpoints.py
+++ b/lldb/test/functionalities/breakpoint/objc/TestObjCBreakpoints.py
@@ -11,7 +11,7 @@ import lldbutil
 import shutil
 import subprocess
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class TestObjCBreakpoints(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/functionalities/command_script/TestCommandScript.py b/lldb/test/functionalities/command_script/TestCommandScript.py
index b7e466d24037..fab1cb2b683a 100644
--- a/lldb/test/functionalities/command_script/TestCommandScript.py
+++ b/lldb/test/functionalities/command_script/TestCommandScript.py
@@ -11,7 +11,7 @@ class CmdPythonTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/conditional_break/TestConditionalBreak.py b/lldb/test/functionalities/conditional_break/TestConditionalBreak.py
index 200faa0f6ec2..1031bfd766c2 100644
--- a/lldb/test/functionalities/conditional_break/TestConditionalBreak.py
+++ b/lldb/test/functionalities/conditional_break/TestConditionalBreak.py
@@ -17,7 +17,7 @@ class ConditionalBreakTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_python(self):
@@ -32,7 +32,7 @@ class ConditionalBreakTestCase(TestBase):
         self.buildDwarf()
         self.do_conditional_break()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_command(self):
         """Simulate a user using lldb commands to break on c() if called from a()."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-advanced/TestDataFormatterAdv.py b/lldb/test/functionalities/data-formatter/data-formatter-advanced/TestDataFormatterAdv.py
index 694ced9fc4b8..702563a20ae8 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-advanced/TestDataFormatterAdv.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-advanced/TestDataFormatterAdv.py
@@ -12,7 +12,7 @@ class AdvDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-categories/TestDataFormatterCategories.py b/lldb/test/functionalities/data-formatter/data-formatter-categories/TestDataFormatterCategories.py
index 5edefd0b0005..76de9a7245e9 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-categories/TestDataFormatterCategories.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-categories/TestDataFormatterCategories.py
@@ -12,7 +12,7 @@ class CategoriesDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py b/lldb/test/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py
index 2d6f888339b7..8ffbb73a6e88 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py
@@ -12,7 +12,7 @@ class CppDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-disabling/TestDataFormatterDisabling.py b/lldb/test/functionalities/data-formatter/data-formatter-disabling/TestDataFormatterDisabling.py
index 107f93d040b7..64979bb51798 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-disabling/TestDataFormatterDisabling.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-disabling/TestDataFormatterDisabling.py
@@ -12,7 +12,7 @@ class DataFormatterDisablingTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-enum-format/TestDataFormatterEnumFormat.py b/lldb/test/functionalities/data-formatter/data-formatter-enum-format/TestDataFormatterEnumFormat.py
index 69e477dfc161..98891e539c21 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-enum-format/TestDataFormatterEnumFormat.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-enum-format/TestDataFormatterEnumFormat.py
@@ -12,7 +12,7 @@ class EnumFormatTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-globals/TestDataFormatterGlobals.py b/lldb/test/functionalities/data-formatter/data-formatter-globals/TestDataFormatterGlobals.py
index b8feee71b243..0b5817fccbed 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-globals/TestDataFormatterGlobals.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-globals/TestDataFormatterGlobals.py
@@ -12,7 +12,7 @@ class GlobalsDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-named-summaries/TestDataFormatterNamedSummaries.py b/lldb/test/functionalities/data-formatter/data-formatter-named-summaries/TestDataFormatterNamedSummaries.py
index 3564f6b3f4df..64e68e5e3204 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-named-summaries/TestDataFormatterNamedSummaries.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-named-summaries/TestDataFormatterNamedSummaries.py
@@ -12,7 +12,7 @@ class NamedSummariesDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-objc/TestDataFormatterObjC.py b/lldb/test/functionalities/data-formatter/data-formatter-objc/TestDataFormatterObjC.py
index 14b3932978b5..f0aadb59ba18 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-objc/TestDataFormatterObjC.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-objc/TestDataFormatterObjC.py
@@ -14,14 +14,14 @@ class ObjCDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_plain_objc_with_dsym_and_run_command(self):
         """Test basic ObjC formatting behavior."""
         self.buildDsym()
         self.plain_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_plain_objc_with_dwarf_and_run_command(self):
         """Test basic ObjC formatting behavior."""
@@ -33,186 +33,186 @@ class ObjCDataFormatterTestCase(TestBase):
         self.appkit_common_data_formatters_command()
         commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsnumber_with_dsym_and_run_command(self):
         """Test formatters for NSNumber."""
         self.appkit_tester_impl(self.buildDsym,self.nsnumber_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsnumber_with_dwarf_and_run_command(self):
         """Test formatters for NSNumber."""
         self.appkit_tester_impl(self.buildDwarf,self.nsnumber_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsstring_with_dsym_and_run_command(self):
         """Test formatters for NSString."""
         self.appkit_tester_impl(self.buildDsym,self.nsstring_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsstring_with_dwarf_and_run_command(self):
         """Test formatters for NSString."""
         self.appkit_tester_impl(self.buildDwarf,self.nsstring_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nscontainers_with_dsym_and_run_command(self):
         """Test formatters for NS container classes."""
         self.appkit_tester_impl(self.buildDsym,self.nscontainers_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nscontainers_with_dwarf_and_run_command(self):
         """Test formatters for  NS container classes."""
         self.appkit_tester_impl(self.buildDwarf,self.nscontainers_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsdata_with_dsym_and_run_command(self):
         """Test formatters for NSData."""
         self.appkit_tester_impl(self.buildDsym,self.nsdata_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsdata_with_dwarf_and_run_command(self):
         """Test formatters for  NSData."""
         self.appkit_tester_impl(self.buildDwarf,self.nsdata_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsurl_with_dsym_and_run_command(self):
         """Test formatters for NSURL."""
         self.appkit_tester_impl(self.buildDsym,self.nsurl_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsurl_with_dwarf_and_run_command(self):
         """Test formatters for NSURL."""
         self.appkit_tester_impl(self.buildDwarf,self.nsurl_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nserror_with_dsym_and_run_command(self):
         """Test formatters for NSError."""
         self.appkit_tester_impl(self.buildDsym,self.nserror_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nserror_with_dwarf_and_run_command(self):
         """Test formatters for NSError."""
         self.appkit_tester_impl(self.buildDwarf,self.nserror_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsbundle_with_dsym_and_run_command(self):
         """Test formatters for NSBundle."""
         self.appkit_tester_impl(self.buildDsym,self.nsbundle_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsbundle_with_dwarf_and_run_command(self):
         """Test formatters for NSBundle."""
         self.appkit_tester_impl(self.buildDwarf,self.nsbundle_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsexception_with_dsym_and_run_command(self):
         """Test formatters for NSException."""
         self.appkit_tester_impl(self.buildDsym,self.nsexception_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsexception_with_dwarf_and_run_command(self):
         """Test formatters for NSException."""
         self.appkit_tester_impl(self.buildDwarf,self.nsexception_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsmisc_with_dsym_and_run_command(self):
         """Test formatters for misc NS classes."""
         self.appkit_tester_impl(self.buildDsym,self.nsmisc_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsmisc_with_dwarf_and_run_command(self):
         """Test formatters for misc NS classes."""
         self.appkit_tester_impl(self.buildDwarf,self.nsmisc_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_nsdate_with_dsym_and_run_command(self):
         """Test formatters for NSDate."""
         self.appkit_tester_impl(self.buildDsym,self.nsdate_data_formatter_commands)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_nsdate_with_dwarf_and_run_command(self):
         """Test formatters for NSDate."""
         self.appkit_tester_impl(self.buildDwarf,self.nsdate_data_formatter_commands)
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_coreframeworks_with_dsym_and_run_command(self):
         """Test formatters for Core OSX frameworks."""
         self.buildDsym()
         self.cf_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_coreframeworks_with_dwarf_and_run_command(self):
         """Test formatters for Core OSX frameworks."""
         self.buildDwarf()
         self.cf_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_kvo_with_dsym_and_run_command(self):
         """Test the behavior of formatters when KVO is in use."""
         self.buildDsym()
         self.kvo_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_kvo_with_dwarf_and_run_command(self):
         """Test the behavior of formatters when KVO is in use."""
         self.buildDwarf()
         self.kvo_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rdar11106605_with_dsym_and_run_command(self):
         """Check that Unicode characters come out of CFString summary correctly."""
         self.buildDsym()
         self.rdar11106605_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_rdar11106605_with_dwarf_and_run_command(self):
         """Check that Unicode characters come out of CFString summary correctly."""
         self.buildDwarf()
         self.rdar11106605_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr_with_dsym_and_run_command(self):
         """Test common cases of expression parser <--> formatters interaction."""
         self.buildDsym()
         self.expr_objc_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_expr_with_dwarf_and_run_command(self):
         """Test common cases of expression parser <--> formatters interaction."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py b/lldb/test/functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py
index aace8a084be8..fad6d4a05b1f 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-python-synth/TestDataFormatterPythonSynth.py
@@ -12,7 +12,7 @@ class PythonSynthDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
@@ -26,7 +26,7 @@ class PythonSynthDataFormatterTestCase(TestBase):
         self.buildDwarf()
         self.data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rdar10960550_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-script/TestDataFormatterScript.py b/lldb/test/functionalities/data-formatter/data-formatter-script/TestDataFormatterScript.py
index 213951385e08..a23fa2c9adc5 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-script/TestDataFormatterScript.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-script/TestDataFormatterScript.py
@@ -12,7 +12,7 @@ class ScriptDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py b/lldb/test/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py
index 05d0365aec8b..6a925dbb2c07 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py
@@ -12,7 +12,7 @@ class SkipSummaryDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-smart-array/TestDataFormatterSmartArray.py b/lldb/test/functionalities/data-formatter/data-formatter-smart-array/TestDataFormatterSmartArray.py
index a6c5ce95fbe9..645d316e5a5c 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-smart-array/TestDataFormatterSmartArray.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-smart-array/TestDataFormatterSmartArray.py
@@ -12,7 +12,7 @@ class SmartArrayDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/iterator/TestDataFormatterLibccIterator.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/iterator/TestDataFormatterLibccIterator.py
index 618681c1c011..c577930cd723 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/iterator/TestDataFormatterLibccIterator.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/iterator/TestDataFormatterLibccIterator.py
@@ -12,7 +12,7 @@ class LibcxxIteratorDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/list/TestDataFormatterLibcxxList.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/list/TestDataFormatterLibcxxList.py
index 9b3dd02d365a..54bb9961f879 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/list/TestDataFormatterLibcxxList.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/list/TestDataFormatterLibcxxList.py
@@ -12,7 +12,7 @@ class LibcxxListDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/map/TestDataFormatterLibccMap.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/map/TestDataFormatterLibccMap.py
index 4807cb926d80..3c8c38a10817 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/map/TestDataFormatterLibccMap.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/map/TestDataFormatterLibccMap.py
@@ -12,7 +12,7 @@ class LibcxxMapDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multimap/TestDataFormatterLibccMultiMap.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multimap/TestDataFormatterLibccMultiMap.py
index 39d948cd7312..7054fd78d18e 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multimap/TestDataFormatterLibccMultiMap.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multimap/TestDataFormatterLibccMultiMap.py
@@ -12,7 +12,7 @@ class LibcxxMultiMapDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multiset/TestDataFormatterLibcxxMultiSet.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multiset/TestDataFormatterLibcxxMultiSet.py
index ff8bd90231f5..ccbefe98f412 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multiset/TestDataFormatterLibcxxMultiSet.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/multiset/TestDataFormatterLibcxxMultiSet.py
@@ -12,7 +12,7 @@ class LibcxxMultiSetDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/set/TestDataFormatterLibcxxSet.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/set/TestDataFormatterLibcxxSet.py
index 045eb70cfe56..be64ec822022 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/set/TestDataFormatterLibcxxSet.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/set/TestDataFormatterLibcxxSet.py
@@ -12,7 +12,7 @@ class LibcxxSetDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
index cfa7cb1b5f4f..a0463e0b1f53 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/string/TestDataFormatterLibcxxString.py
@@ -13,7 +13,7 @@ class LibcxxStringDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/unordered/TestDataFormatterUnordered.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/unordered/TestDataFormatterUnordered.py
index ac03705d1050..7f2a7dd42da6 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/unordered/TestDataFormatterUnordered.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/unordered/TestDataFormatterUnordered.py
@@ -12,7 +12,7 @@ class LibcxxMultiMapDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/TestDataFormatterLibcxxVBool.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/TestDataFormatterLibcxxVBool.py
index aad75d46dcdc..8dba1ff401c5 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/TestDataFormatterLibcxxVBool.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vbool/TestDataFormatterLibcxxVBool.py
@@ -12,7 +12,7 @@ class LibcxxVBoolDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vector/TestDataFormatterLibcxxVector.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vector/TestDataFormatterLibcxxVector.py
index 84c2cf8bc8d0..edd5b02a8987 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vector/TestDataFormatterLibcxxVector.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libcxx/vector/TestDataFormatterLibcxxVector.py
@@ -12,7 +12,7 @@ class LibcxxVectorDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/iterator/TestDataFormatterStdIterator.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/iterator/TestDataFormatterStdIterator.py
index 05ae523232a0..bac3057309f1 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/iterator/TestDataFormatterStdIterator.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/iterator/TestDataFormatterStdIterator.py
@@ -12,7 +12,7 @@ class StdIteratorDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/list/TestDataFormatterStdList.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/list/TestDataFormatterStdList.py
index 2f7b763a5344..6b06581112a6 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/list/TestDataFormatterStdList.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/list/TestDataFormatterStdList.py
@@ -12,7 +12,7 @@ class StdListDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/map/TestDataFormatterStdMap.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/map/TestDataFormatterStdMap.py
index c7cc5ae2146f..d2ffa0f4b363 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/map/TestDataFormatterStdMap.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/map/TestDataFormatterStdMap.py
@@ -12,7 +12,7 @@ class StdMapDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py
index fa8b1931d279..9188efb8d557 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/string/TestDataFormatterStdString.py
@@ -13,7 +13,7 @@ class StdStringDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/TestDataFormatterStdVBool.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/TestDataFormatterStdVBool.py
index 314b5b9a17ab..7fc8a7c817c5 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/TestDataFormatterStdVBool.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vbool/TestDataFormatterStdVBool.py
@@ -12,7 +12,7 @@ class StdVBoolDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @skipIfDarwin
     def test_with_dsym_and_run_command(self):
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vector/TestDataFormatterStdVector.py b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vector/TestDataFormatterStdVector.py
index 698ceabb3833..9d4ea773eb75 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vector/TestDataFormatterStdVector.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/vector/TestDataFormatterStdVector.py
@@ -12,7 +12,7 @@ class StdVectorDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-synth/TestDataFormatterSynth.py b/lldb/test/functionalities/data-formatter/data-formatter-synth/TestDataFormatterSynth.py
index a6aad2e28807..f6aeaa9de4d2 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-synth/TestDataFormatterSynth.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-synth/TestDataFormatterSynth.py
@@ -12,7 +12,7 @@ class SynthDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py b/lldb/test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py
index 88b1db21888f..f481942248f9 100644
--- a/lldb/test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py
+++ b/lldb/test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py
@@ -12,7 +12,7 @@ class DataFormatterSynthValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test using Python synthetic children provider to provide a value."""
diff --git a/lldb/test/functionalities/data-formatter/format-propagation/TestFormatPropagation.py b/lldb/test/functionalities/data-formatter/format-propagation/TestFormatPropagation.py
index b8a7ba3a4388..cc670569d72b 100644
--- a/lldb/test/functionalities/data-formatter/format-propagation/TestFormatPropagation.py
+++ b/lldb/test/functionalities/data-formatter/format-propagation/TestFormatPropagation.py
@@ -13,7 +13,7 @@ class FormatPropagationTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     # rdar://problem/14035604
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Check if changing Format on an SBValue correctly propagates that new format to children as it should"""
diff --git a/lldb/test/functionalities/data-formatter/frameformat_smallstruct/TestFrameFormatSmallStruct.py b/lldb/test/functionalities/data-formatter/frameformat_smallstruct/TestFrameFormatSmallStruct.py
index 02b18d86c0c3..7580a5f86b76 100644
--- a/lldb/test/functionalities/data-formatter/frameformat_smallstruct/TestFrameFormatSmallStruct.py
+++ b/lldb/test/functionalities/data-formatter/frameformat_smallstruct/TestFrameFormatSmallStruct.py
@@ -12,7 +12,7 @@ class FrameFormatSmallStructTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that the user can input a format but it will not prevail over summary format's choices."""
diff --git a/lldb/test/functionalities/data-formatter/ptr_ref_typedef/TestPtrRef2Typedef.py b/lldb/test/functionalities/data-formatter/ptr_ref_typedef/TestPtrRef2Typedef.py
index 0fe21a8ae890..ad086e6e1a95 100644
--- a/lldb/test/functionalities/data-formatter/ptr_ref_typedef/TestPtrRef2Typedef.py
+++ b/lldb/test/functionalities/data-formatter/ptr_ref_typedef/TestPtrRef2Typedef.py
@@ -12,7 +12,7 @@ class PtrRef2TypedefTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-10449092/Test-rdar-10449092.py b/lldb/test/functionalities/data-formatter/rdar-10449092/Test-rdar-10449092.py
index 9ec5cb50530c..ac8757f6cfef 100644
--- a/lldb/test/functionalities/data-formatter/rdar-10449092/Test-rdar-10449092.py
+++ b/lldb/test/functionalities/data-formatter/rdar-10449092/Test-rdar-10449092.py
@@ -13,7 +13,7 @@ class Radar10449092DataFormatterTestCase(TestBase):
     # test for rdar://problem/10449092 ()
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-10642615/Test-rdar-10642615.py b/lldb/test/functionalities/data-formatter/rdar-10642615/Test-rdar-10642615.py
index 0a21af8b223d..b4f6294c11a8 100644
--- a/lldb/test/functionalities/data-formatter/rdar-10642615/Test-rdar-10642615.py
+++ b/lldb/test/functionalities/data-formatter/rdar-10642615/Test-rdar-10642615.py
@@ -13,14 +13,14 @@ class Radar10642615DataFormatterTestCase(TestBase):
     # test for rdar://problem/10642615 ()
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
         self.buildDsym()
         self.data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-10887661/TestRdar10887661.py b/lldb/test/functionalities/data-formatter/rdar-10887661/TestRdar10887661.py
index a662f142104d..67aa08de6b83 100644
--- a/lldb/test/functionalities/data-formatter/rdar-10887661/TestRdar10887661.py
+++ b/lldb/test/functionalities/data-formatter/rdar-10887661/TestRdar10887661.py
@@ -13,7 +13,7 @@ class Rdar10887661TestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     # rdar://problem/10887661
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Check for an issue where capping does not work because the Target pointer appears to be changing behind our backs."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-11086338/TestRdar11086338.py b/lldb/test/functionalities/data-formatter/rdar-11086338/TestRdar11086338.py
index 3f6dc27b6344..40bd599617fb 100644
--- a/lldb/test/functionalities/data-formatter/rdar-11086338/TestRdar11086338.py
+++ b/lldb/test/functionalities/data-formatter/rdar-11086338/TestRdar11086338.py
@@ -13,14 +13,14 @@ class DataFormatterRdar11086338TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rdar11086338_with_dsym_and_run_command(self):
         """Test that NSArray reports its synthetic children properly."""
         self.buildDsym()
         self.rdar11086338_tester()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_rdar11086338_with_dwarf_and_run_command(self):
         """Test that NSArray reports its synthetic children properly."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-11628688/TestFormattersBoolRefPtr.py b/lldb/test/functionalities/data-formatter/rdar-11628688/TestFormattersBoolRefPtr.py
index a3b908234733..f0584c89ed25 100644
--- a/lldb/test/functionalities/data-formatter/rdar-11628688/TestFormattersBoolRefPtr.py
+++ b/lldb/test/functionalities/data-formatter/rdar-11628688/TestFormattersBoolRefPtr.py
@@ -13,14 +13,14 @@ class DataFormatterOSTypeTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_ostype_with_dsym_and_run_command(self):
         """Test the formatters we use for OSType."""
         self.buildDsym()
         self.ostype_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_ostype_with_dwarf_and_run_command(self):
         """Test the formatters we use for OSType."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-11773899/TestFormattersBoolRefPtr.py b/lldb/test/functionalities/data-formatter/rdar-11773899/TestFormattersBoolRefPtr.py
index 99e6953b6baa..092737b3ac23 100644
--- a/lldb/test/functionalities/data-formatter/rdar-11773899/TestFormattersBoolRefPtr.py
+++ b/lldb/test/functionalities/data-formatter/rdar-11773899/TestFormattersBoolRefPtr.py
@@ -13,14 +13,14 @@ class DataFormatterBoolRefPtr(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_boolrefptr_with_dsym_and_run_command(self):
         """Test the formatters we use for BOOL& and BOOL* in Objective-C."""
         self.buildDsym()
         self.boolrefptr_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_boolrefptr_with_dwarf_and_run_command(self):
         """Test the formatters we use for BOOL& and BOOL* in Objective-C."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-11988289/TestRdar 11988289.py b/lldb/test/functionalities/data-formatter/rdar-11988289/TestRdar 11988289.py
index 4a8829f20799..ae1b83bd39b5 100644
--- a/lldb/test/functionalities/data-formatter/rdar-11988289/TestRdar 11988289.py	
+++ b/lldb/test/functionalities/data-formatter/rdar-11988289/TestRdar 11988289.py	
@@ -13,14 +13,14 @@ class DataFormatterRdar11988289TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rdar11988289_with_dsym_and_run_command(self):
         """Test that NSDictionary reports its synthetic children properly."""
         self.buildDsym()
         self.rdar11988289_tester()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_rdar11988289_with_dwarf_and_run_command(self):
         """Test that NSDictionary reports its synthetic children properly."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-12437442/TestRdar12437442.py b/lldb/test/functionalities/data-formatter/rdar-12437442/TestRdar12437442.py
index e08fcb2d06e9..c96f38b08036 100644
--- a/lldb/test/functionalities/data-formatter/rdar-12437442/TestRdar12437442.py
+++ b/lldb/test/functionalities/data-formatter/rdar-12437442/TestRdar12437442.py
@@ -13,14 +13,14 @@ class DataFormatterRdar12437442TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rdar12437442_with_dsym_and_run_command(self):
         """Test that we update SBValues correctly as dynamic types change."""
         self.buildDsym()
         self.rdar12437442_tester()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_rdar12437442_with_dwarf_and_run_command(self):
         """Test that we update SBValues correctly as dynamic types change."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-12529957/TestRdar12529957.py b/lldb/test/functionalities/data-formatter/rdar-12529957/TestRdar12529957.py
index 326c5d60c294..83a36ecda557 100644
--- a/lldb/test/functionalities/data-formatter/rdar-12529957/TestRdar12529957.py
+++ b/lldb/test/functionalities/data-formatter/rdar-12529957/TestRdar12529957.py
@@ -13,14 +13,14 @@ class DataFormatterRdar12529957TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rdar12529957_with_dsym_and_run_command(self):
         """Test that NSSet reports its synthetic children properly."""
         self.buildDsym()
         self.rdar12529957_tester()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_rdar12529957_with_dwarf_and_run_command(self):
         """Test that NSSet reports its synthetic children properly."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-13338477/Test-rdar-13338477.py b/lldb/test/functionalities/data-formatter/rdar-13338477/Test-rdar-13338477.py
index cc936ba03bb8..5a2acda18a3e 100644
--- a/lldb/test/functionalities/data-formatter/rdar-13338477/Test-rdar-13338477.py
+++ b/lldb/test/functionalities/data-formatter/rdar-13338477/Test-rdar-13338477.py
@@ -13,7 +13,7 @@ class Radar13338477DataFormatterTestCase(TestBase):
     # test for rdar://problem/13338477 ()
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that LLDB handles the clang typeclass Paren correctly."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-3534688/TestFormattersOneIsSingular.py b/lldb/test/functionalities/data-formatter/rdar-3534688/TestFormattersOneIsSingular.py
index 42026ef9f2b3..b3cbeb43e10c 100644
--- a/lldb/test/functionalities/data-formatter/rdar-3534688/TestFormattersOneIsSingular.py
+++ b/lldb/test/functionalities/data-formatter/rdar-3534688/TestFormattersOneIsSingular.py
@@ -13,14 +13,14 @@ class DataFormatterOneIsSingularTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_one_is_singular_with_dsym_and_run_command(self):
         """Test that 1 item is not as reported as 1 items."""
         self.buildDsym()
         self.oneness_data_formatter_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_one_is_singular_with_dwarf_and_run_command(self):
         """Test that 1 item is not as reported as 1 items."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-9973865/Test-rdar-9973865.py b/lldb/test/functionalities/data-formatter/rdar-9973865/Test-rdar-9973865.py
index aa9772b69efd..9470fbf2393d 100644
--- a/lldb/test/functionalities/data-formatter/rdar-9973865/Test-rdar-9973865.py
+++ b/lldb/test/functionalities/data-formatter/rdar-9973865/Test-rdar-9973865.py
@@ -13,7 +13,7 @@ class Radar9973865DataFormatterTestCase(TestBase):
     # test for rdar://problem/9973865 (If you use "${var}" in the summary string for an aggregate type, the summary doesn't print for a pointer to that type)
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-9973992/Test-rdar-9973992.py b/lldb/test/functionalities/data-formatter/rdar-9973992/Test-rdar-9973992.py
index 81bc93cade53..5f31904279c2 100644
--- a/lldb/test/functionalities/data-formatter/rdar-9973992/Test-rdar-9973992.py
+++ b/lldb/test/functionalities/data-formatter/rdar-9973992/Test-rdar-9973992.py
@@ -13,7 +13,7 @@ class Radar9973992DataFormatterTestCase(TestBase):
     # test for rdar://problem/9973992 (What should we do for "${var}" in summaries of aggregate types?)
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py b/lldb/test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py
index ee77e5b4f5d8..087f38059098 100644
--- a/lldb/test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py
+++ b/lldb/test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py
@@ -13,7 +13,7 @@ class Radar9974002DataFormatterTestCase(TestBase):
     # test for rdar://problem/9974002 ()
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/refpointer-recursion/TestDataFormatterRefPtrRecursion.py b/lldb/test/functionalities/data-formatter/refpointer-recursion/TestDataFormatterRefPtrRecursion.py
index e1b195570d0e..237099d7bdde 100644
--- a/lldb/test/functionalities/data-formatter/refpointer-recursion/TestDataFormatterRefPtrRecursion.py
+++ b/lldb/test/functionalities/data-formatter/refpointer-recursion/TestDataFormatterRefPtrRecursion.py
@@ -12,7 +12,7 @@ class DataFormatterRefPtrRecursionTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that ValueObjectPrinter does not cause an infinite loop when a reference to a struct that contains a pointer to itself is printed."""
diff --git a/lldb/test/functionalities/data-formatter/user-format-vs-summary/TestUserFormatVsSummary.py b/lldb/test/functionalities/data-formatter/user-format-vs-summary/TestUserFormatVsSummary.py
index eb6aeb50c45b..7650c23bb51a 100644
--- a/lldb/test/functionalities/data-formatter/user-format-vs-summary/TestUserFormatVsSummary.py
+++ b/lldb/test/functionalities/data-formatter/user-format-vs-summary/TestUserFormatVsSummary.py
@@ -12,7 +12,7 @@ class UserFormatVSSummaryTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that the user can input a format but it will not prevail over summary format's choices."""
diff --git a/lldb/test/functionalities/data-formatter/varscript_formatting/TestDataFormatterVarScriptFormatting.py b/lldb/test/functionalities/data-formatter/varscript_formatting/TestDataFormatterVarScriptFormatting.py
index 01bf12267ef0..66f597d34935 100644
--- a/lldb/test/functionalities/data-formatter/varscript_formatting/TestDataFormatterVarScriptFormatting.py
+++ b/lldb/test/functionalities/data-formatter/varscript_formatting/TestDataFormatterVarScriptFormatting.py
@@ -13,7 +13,7 @@ class PythonSynthDataFormatterTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test data formatter commands."""
diff --git a/lldb/test/functionalities/data-formatter/vector-types/TestVectorTypesFormatting.py b/lldb/test/functionalities/data-formatter/vector-types/TestVectorTypesFormatting.py
index 41a24834f88d..a006875ec969 100644
--- a/lldb/test/functionalities/data-formatter/vector-types/TestVectorTypesFormatting.py
+++ b/lldb/test/functionalities/data-formatter/vector-types/TestVectorTypesFormatting.py
@@ -13,7 +13,7 @@ class VectorTypesFormattingTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     # rdar://problem/14035604
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Check that vector types format properly"""
diff --git a/lldb/test/functionalities/dead-strip/TestDeadStrip.py b/lldb/test/functionalities/dead-strip/TestDeadStrip.py
index 1371953b32f6..1f163e9a80cc 100644
--- a/lldb/test/functionalities/dead-strip/TestDeadStrip.py
+++ b/lldb/test/functionalities/dead-strip/TestDeadStrip.py
@@ -12,7 +12,7 @@ class DeadStripTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test breakpoint works correctly with dead-code stripping."""
diff --git a/lldb/test/functionalities/disassembly/TestDisassembleBreakpoint.py b/lldb/test/functionalities/disassembly/TestDisassembleBreakpoint.py
index 9324592a1581..b6c64fce1fe6 100644
--- a/lldb/test/functionalities/disassembly/TestDisassembleBreakpoint.py
+++ b/lldb/test/functionalities/disassembly/TestDisassembleBreakpoint.py
@@ -12,7 +12,7 @@ class DisassemblyTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py b/lldb/test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py
index f96ab621c70a..6973db16adc5 100644
--- a/lldb/test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py
+++ b/lldb/test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py
@@ -12,7 +12,7 @@ class DynamicValueChildCountTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     @expectedFailurei386("to be figured out")
diff --git a/lldb/test/functionalities/embedded_interpreter/TestConvenienceVariables.py b/lldb/test/functionalities/embedded_interpreter/TestConvenienceVariables.py
index a997fbda5ee9..afd676acb31f 100644
--- a/lldb/test/functionalities/embedded_interpreter/TestConvenienceVariables.py
+++ b/lldb/test/functionalities/embedded_interpreter/TestConvenienceVariables.py
@@ -9,7 +9,7 @@ class ConvenienceVariablesCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @skipIfRemote
     def test_with_dsym_and_run_command(self):
diff --git a/lldb/test/functionalities/exec/TestExec.py b/lldb/test/functionalities/exec/TestExec.py
index 3501fd22f062..e5d19583ee3f 100644
--- a/lldb/test/functionalities/exec/TestExec.py
+++ b/lldb/test/functionalities/exec/TestExec.py
@@ -22,7 +22,7 @@ class ExecTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
         
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         if self.getArchitecture() == 'x86_64':
@@ -35,7 +35,7 @@ class ExecTestCase(TestBase):
         self.do_test ()
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf (self):
         if self.getArchitecture() == 'x86_64':
diff --git a/lldb/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py b/lldb/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
index 969b1c68f3a2..d9e736baf21c 100644
--- a/lldb/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
+++ b/lldb/test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
@@ -15,7 +15,7 @@ class ExprDoesntDeadlockTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that expr will time out and allow other threads to run if it blocks - with dsym."""
diff --git a/lldb/test/functionalities/fat_archives/TestFatArchives.py b/lldb/test/functionalities/fat_archives/TestFatArchives.py
index a878cc4c5d90..dc31738df2ba 100644
--- a/lldb/test/functionalities/fat_archives/TestFatArchives.py
+++ b/lldb/test/functionalities/fat_archives/TestFatArchives.py
@@ -21,7 +21,7 @@ class FatArchiveTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf (self):
         if self.getArchitecture() == 'x86_64':
diff --git a/lldb/test/functionalities/inferior-assert/TestInferiorAssert.py b/lldb/test/functionalities/inferior-assert/TestInferiorAssert.py
index 5fe235cc7959..3e4aae746a3a 100644
--- a/lldb/test/functionalities/inferior-assert/TestInferiorAssert.py
+++ b/lldb/test/functionalities/inferior-assert/TestInferiorAssert.py
@@ -9,7 +9,7 @@ class AssertingInferiorTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @unittest2.expectedFailure("rdar://15367233")
     def test_inferior_asserting_dsym(self):
         """Test that lldb reliably catches the inferior asserting (command)."""
@@ -24,7 +24,7 @@ class AssertingInferiorTestCase(TestBase):
         self.buildDwarf()
         self.inferior_asserting()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_asserting_registers_dsym(self):
         """Test that lldb reliably reads registers from the inferior after asserting (command)."""
         self.buildDsym()
@@ -52,7 +52,7 @@ class AssertingInferiorTestCase(TestBase):
         self.buildDefault()
         self.inferior_asserting_python()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @unittest2.expectedFailure("rdar://15367233")
     def test_inferior_asserting_expr_dsym(self):
         """Test that the lldb expression interpreter can read from the inferior after asserting (command)."""
@@ -67,7 +67,7 @@ class AssertingInferiorTestCase(TestBase):
         self.buildDwarf()
         self.inferior_asserting_expr()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @unittest2.expectedFailure("rdar://15367233")
     def test_inferior_asserting_step_dsym(self):
         """Test that lldb functions correctly after stepping through a call to assert()."""
diff --git a/lldb/test/functionalities/inferior-changed/TestInferiorChanged.py b/lldb/test/functionalities/inferior-changed/TestInferiorChanged.py
index ef078fbeb9ef..4e810c085bcc 100644
--- a/lldb/test/functionalities/inferior-changed/TestInferiorChanged.py
+++ b/lldb/test/functionalities/inferior-changed/TestInferiorChanged.py
@@ -10,7 +10,7 @@ class ChangedInferiorTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_dsym(self):
         """Test lldb reloads the inferior after it was changed during the session."""
         self.buildDsym()
diff --git a/lldb/test/functionalities/inferior-crashing/TestInferiorCrashing.py b/lldb/test/functionalities/inferior-crashing/TestInferiorCrashing.py
index 440b8959f215..7ce51de72f18 100644
--- a/lldb/test/functionalities/inferior-crashing/TestInferiorCrashing.py
+++ b/lldb/test/functionalities/inferior-crashing/TestInferiorCrashing.py
@@ -9,7 +9,7 @@ class CrashingInferiorTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_dsym(self):
         """Test that lldb reliably catches the inferior crashing (command)."""
         self.buildDsym()
@@ -20,7 +20,7 @@ class CrashingInferiorTestCase(TestBase):
         self.buildDwarf()
         self.inferior_crashing()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_registers_dsym(self):
         """Test that lldb reliably reads registers from the inferior after crashing (command)."""
         self.buildDsym()
@@ -37,7 +37,7 @@ class CrashingInferiorTestCase(TestBase):
         self.buildDefault()
         self.inferior_crashing_python()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_expr_dsym(self):
         """Test that the lldb expression interpreter can read from the inferior after crashing (command)."""
         self.buildDsym()
@@ -48,7 +48,7 @@ class CrashingInferiorTestCase(TestBase):
         self.buildDwarf()
         self.inferior_crashing_expr()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_step_dsym(self):
         """Test that lldb functions correctly after stepping through a crash."""
         self.buildDsym()
@@ -59,7 +59,7 @@ class CrashingInferiorTestCase(TestBase):
         self.buildDwarf()
         self.inferior_crashing_step()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_step_after_break_dsym(self):
         """Test that stepping after a crash behaves correctly."""
         self.buildDsym()
@@ -72,7 +72,7 @@ class CrashingInferiorTestCase(TestBase):
         self.buildDwarf()
         self.inferior_crashing_step_after_break()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_inferior_crashing_expr_step_and_expr_dsym(self):
         """Test that lldb expressions work before and after stepping after a crash."""
         self.buildDsym()
diff --git a/lldb/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py b/lldb/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py
index d10eab812816..e5b2ee8839e9 100644
--- a/lldb/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py
+++ b/lldb/test/functionalities/inferior-crashing/recursive-inferior/TestRecursiveInferior.py
@@ -10,7 +10,7 @@ class CrashingRecursiveInferiorTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_recursive_inferior_crashing_dsym(self):
         """Test that lldb reliably catches the inferior crashing (command)."""
         self.buildDsym()
@@ -21,7 +21,7 @@ class CrashingRecursiveInferiorTestCase(TestBase):
         self.buildDwarf()
         self.recursive_inferior_crashing()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_recursive_inferior_crashing_registers_dsym(self):
         """Test that lldb reliably reads registers from the inferior after crashing (command)."""
         self.buildDsym()
@@ -38,7 +38,7 @@ class CrashingRecursiveInferiorTestCase(TestBase):
         self.buildDefault()
         self.recursive_inferior_crashing_python()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_recursive_inferior_crashing_expr_dsym(self):
         """Test that the lldb expression interpreter can read from the inferior after crashing (command)."""
         self.buildDsym()
@@ -49,7 +49,7 @@ class CrashingRecursiveInferiorTestCase(TestBase):
         self.buildDwarf()
         self.recursive_inferior_crashing_expr()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_recursive_inferior_crashing_step_dsym(self):
         """Test that lldb functions correctly after stepping through a crash."""
         self.buildDsym()
@@ -60,7 +60,7 @@ class CrashingRecursiveInferiorTestCase(TestBase):
         self.buildDwarf()
         self.recursive_inferior_crashing_step()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_recursive_inferior_crashing_step_after_break_dsym(self):
         """Test that stepping after a crash behaves correctly."""
         self.buildDsym()
@@ -73,7 +73,7 @@ class CrashingRecursiveInferiorTestCase(TestBase):
         self.buildDwarf()
         self.recursive_inferior_crashing_step_after_break()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_recursive_inferior_crashing_expr_step_and_expr_dsym(self):
         """Test that lldb expressions work before and after stepping after a crash."""
         self.buildDsym()
diff --git a/lldb/test/functionalities/inline-stepping/TestInlineStepping.py b/lldb/test/functionalities/inline-stepping/TestInlineStepping.py
index e28aefbc532a..4a93dab4fa72 100644
--- a/lldb/test/functionalities/inline-stepping/TestInlineStepping.py
+++ b/lldb/test/functionalities/inline-stepping/TestInlineStepping.py
@@ -10,7 +10,7 @@ class TestInlineStepping(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -27,7 +27,7 @@ class TestInlineStepping(TestBase):
         self.buildDwarf()
         self.inline_stepping()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_over_with_dsym_and_python_api(self):
diff --git a/lldb/test/functionalities/launch_with_shellexpand/TestLaunchWithShellExpand.py b/lldb/test/functionalities/launch_with_shellexpand/TestLaunchWithShellExpand.py
index 784b57260588..6ef60e21af4b 100644
--- a/lldb/test/functionalities/launch_with_shellexpand/TestLaunchWithShellExpand.py
+++ b/lldb/test/functionalities/launch_with_shellexpand/TestLaunchWithShellExpand.py
@@ -14,7 +14,7 @@ class LaunchWithShellExpandTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
         
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym()
diff --git a/lldb/test/functionalities/memory/read/TestMemoryRead.py b/lldb/test/functionalities/memory/read/TestMemoryRead.py
index a9fe6c279659..4dab7140f566 100644
--- a/lldb/test/functionalities/memory/read/TestMemoryRead.py
+++ b/lldb/test/functionalities/memory/read/TestMemoryRead.py
@@ -13,7 +13,7 @@ class MemoryReadTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_memory_read_with_dsym(self):
         """Test the 'memory read' command with plain and vector formats."""
diff --git a/lldb/test/functionalities/nosucharch/TestNoSuchArch.py b/lldb/test/functionalities/nosucharch/TestNoSuchArch.py
index bba3ab632bcb..06eb0dc9db29 100644
--- a/lldb/test/functionalities/nosucharch/TestNoSuchArch.py
+++ b/lldb/test/functionalities/nosucharch/TestNoSuchArch.py
@@ -11,14 +11,14 @@ class NoSuchArchTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
         
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym()
         self.do_test ()
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf (self):
         self.buildDwarf()
diff --git a/lldb/test/functionalities/paths/TestPaths.py b/lldb/test/functionalities/paths/TestPaths.py
index a211145d57f3..bc549a64bf89 100644
--- a/lldb/test/functionalities/paths/TestPaths.py
+++ b/lldb/test/functionalities/paths/TestPaths.py
@@ -34,7 +34,7 @@ class TestPaths(TestBase):
         # file path if it doesn't exist in the current directory.
         self.assertTrue (file_only.GetDirectory() == None)
 
-    @unittest2.skipUnless(sys.platform.startswith("win32"), "Test for windows only")
+    @skipUnlessPlatform(["windows"])
     def test_windows_double_slash (self):
         '''Test to check the path with double slash is handled correctly '''
         # Create a path and see if lldb gets the directory and file right
diff --git a/lldb/test/functionalities/plugins/python_os_plugin/TestPythonOSPlugin.py b/lldb/test/functionalities/plugins/python_os_plugin/TestPythonOSPlugin.py
index 48a82e6dc0c1..fe0b4a21bf37 100644
--- a/lldb/test/functionalities/plugins/python_os_plugin/TestPythonOSPlugin.py
+++ b/lldb/test/functionalities/plugins/python_os_plugin/TestPythonOSPlugin.py
@@ -13,7 +13,7 @@ class PluginPythonOSPlugin(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_python_os_plugin_dsym(self):
         """Test that the Python operating system plugin works correctly"""
diff --git a/lldb/test/functionalities/process_attach/TestProcessAttach.py b/lldb/test/functionalities/process_attach/TestProcessAttach.py
index 27f6cb063f2a..56a94392e8d2 100644
--- a/lldb/test/functionalities/process_attach/TestProcessAttach.py
+++ b/lldb/test/functionalities/process_attach/TestProcessAttach.py
@@ -14,7 +14,7 @@ class ProcessAttachTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_attach_to_process_by_id_with_dsym(self):
         """Test attach by process id"""
@@ -27,7 +27,7 @@ class ProcessAttachTestCase(TestBase):
         self.buildDwarf()
         self.process_attach_by_id()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_attach_to_process_by_name_with_dsym(self):
         """Test attach by process name"""
diff --git a/lldb/test/functionalities/process_launch/TestProcessLaunch.py b/lldb/test/functionalities/process_launch/TestProcessLaunch.py
index 164c0c70eea0..d8c87a63c722 100644
--- a/lldb/test/functionalities/process_launch/TestProcessLaunch.py
+++ b/lldb/test/functionalities/process_launch/TestProcessLaunch.py
@@ -18,7 +18,7 @@ class ProcessLaunchTestCase(TestBase):
         self.runCmd("settings set auto-confirm true")
         self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_io_with_dsym (self):
         """Test that process launch I/O redirection flags work properly."""
@@ -117,7 +117,7 @@ class ProcessLaunchTestCase(TestBase):
 
     d = {'CXX_SOURCES' : 'print_cwd.cpp'}
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @expectedFailureDarwin("llvm.org/pr20265")
     def test_set_working_dir_with_dsym (self):
diff --git a/lldb/test/functionalities/recursion/TestValueObjectRecursion.py b/lldb/test/functionalities/recursion/TestValueObjectRecursion.py
index e20ee9bd5b64..42724d588941 100644
--- a/lldb/test/functionalities/recursion/TestValueObjectRecursion.py
+++ b/lldb/test/functionalities/recursion/TestValueObjectRecursion.py
@@ -12,7 +12,7 @@ class ValueObjectRecursionTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that deeply nested ValueObjects still work."""
diff --git a/lldb/test/functionalities/rerun/TestRerun.py b/lldb/test/functionalities/rerun/TestRerun.py
index 469f04c59cad..18b447cc563c 100644
--- a/lldb/test/functionalities/rerun/TestRerun.py
+++ b/lldb/test/functionalities/rerun/TestRerun.py
@@ -14,7 +14,7 @@ class TestRerun(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
         
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym()
diff --git a/lldb/test/functionalities/return-value/TestReturnValue.py b/lldb/test/functionalities/return-value/TestReturnValue.py
index 6fe9781ff7fe..8791b88ae6b5 100644
--- a/lldb/test/functionalities/return-value/TestReturnValue.py
+++ b/lldb/test/functionalities/return-value/TestReturnValue.py
@@ -12,7 +12,7 @@ class ReturnValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailurei386
     @python_api_test
     @dsym_test
diff --git a/lldb/test/functionalities/set-data/TestSetData.py b/lldb/test/functionalities/set-data/TestSetData.py
index d94d3e870db2..07fdc7e0d68a 100644
--- a/lldb/test/functionalities/set-data/TestSetData.py
+++ b/lldb/test/functionalities/set-data/TestSetData.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class SetDataTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/functionalities/signal/TestSendSignal.py b/lldb/test/functionalities/signal/TestSendSignal.py
index 4dac5e9000de..008a1ee05fda 100644
--- a/lldb/test/functionalities/signal/TestSendSignal.py
+++ b/lldb/test/functionalities/signal/TestSendSignal.py
@@ -10,7 +10,7 @@ class SendSignalTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that lldb command 'process signal SIGUSR1' sends a signal to the inferior process."""
diff --git a/lldb/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py b/lldb/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py
index f6c6a275c942..3b86f3b55c5d 100644
--- a/lldb/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py
+++ b/lldb/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py
@@ -13,7 +13,7 @@ class ReturnValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_out_with_dsym_python(self):
@@ -30,7 +30,7 @@ class ReturnValueTestCase(TestBase):
         self.get_to_starting_point()
         self.do_step_out_past_nodebug()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_over_with_dsym_python(self):
@@ -48,7 +48,7 @@ class ReturnValueTestCase(TestBase):
         self.get_to_starting_point()
         self.do_step_over_past_nodebug()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_in_with_dsym_python(self):
diff --git a/lldb/test/functionalities/stop-hook/TestStopHookCmd.py b/lldb/test/functionalities/stop-hook/TestStopHookCmd.py
index 0605dee7af4d..8453cc340a2e 100644
--- a/lldb/test/functionalities/stop-hook/TestStopHookCmd.py
+++ b/lldb/test/functionalities/stop-hook/TestStopHookCmd.py
@@ -18,7 +18,7 @@ class StopHookCmdTestCase(TestBase):
         """target stop-hook list should not crash if no target has been set."""
         self.runCmd("target stop-hook list", check=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test a sequence of target stop-hook commands."""
diff --git a/lldb/test/functionalities/stop-hook/TestStopHookMechanism.py b/lldb/test/functionalities/stop-hook/TestStopHookMechanism.py
index c871c15ee194..be7d5fb0b38a 100644
--- a/lldb/test/functionalities/stop-hook/TestStopHookMechanism.py
+++ b/lldb/test/functionalities/stop-hook/TestStopHookMechanism.py
@@ -11,7 +11,7 @@ class StopHookMechanismTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test the stop-hook mechanism."""
diff --git a/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py b/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py
index 60fd77db5e38..45151cd2a06e 100644
--- a/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py
+++ b/lldb/test/functionalities/stop-hook/multiple_threads/TestStopHookMultipleThreads.py
@@ -11,7 +11,7 @@ class StopHookForMultipleThreadsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_stop_hook_multiple_threads_with_dsym(self):
         """Test that lldb stop-hook works for multiple threads."""
diff --git a/lldb/test/functionalities/target_command/TestTargetCommand.py b/lldb/test/functionalities/target_command/TestTargetCommand.py
index 694f7e155e58..8cf327ae32b1 100644
--- a/lldb/test/functionalities/target_command/TestTargetCommand.py
+++ b/lldb/test/functionalities/target_command/TestTargetCommand.py
@@ -38,7 +38,7 @@ class targetCommandTestCase(TestBase):
 
     # rdar://problem/9763907
     # 'target variable' command fails if the target program has been run
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_target_variable_command_with_dsym(self):
         """Test 'target variable' command before and after starting the inferior."""
@@ -48,7 +48,7 @@ class targetCommandTestCase(TestBase):
 
         self.do_target_variable_command('globals')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_target_variable_command_with_dsym_no_fail(self):
         """Test 'target variable' command before and after starting the inferior."""
diff --git a/lldb/test/functionalities/thread/TestNumThreads.py b/lldb/test/functionalities/thread/TestNumThreads.py
index de012749a006..d2156399d61f 100644
--- a/lldb/test/functionalities/thread/TestNumThreads.py
+++ b/lldb/test/functionalities/thread/TestNumThreads.py
@@ -12,7 +12,7 @@ class NumberOfThreadsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test number of threads."""
diff --git a/lldb/test/functionalities/thread/break_after_join/TestBreakAfterJoin.py b/lldb/test/functionalities/thread/break_after_join/TestBreakAfterJoin.py
index a5e578a4510c..c230c1aad7c1 100644
--- a/lldb/test/functionalities/thread/break_after_join/TestBreakAfterJoin.py
+++ b/lldb/test/functionalities/thread/break_after_join/TestBreakAfterJoin.py
@@ -12,7 +12,7 @@ class BreakpointAfterJoinTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/functionalities/thread/create_after_attach/TestCreateAfterAttach.py b/lldb/test/functionalities/thread/create_after_attach/TestCreateAfterAttach.py
index 60ecd8c3621b..43889aee58a8 100644
--- a/lldb/test/functionalities/thread/create_after_attach/TestCreateAfterAttach.py
+++ b/lldb/test/functionalities/thread/create_after_attach/TestCreateAfterAttach.py
@@ -12,7 +12,7 @@ class CreateAfterAttachTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_create_after_attach_with_dsym(self):
         """Test thread creation after process attach."""
diff --git a/lldb/test/functionalities/thread/create_during_step/TestCreateDuringStep.py b/lldb/test/functionalities/thread/create_during_step/TestCreateDuringStep.py
index 6acd64339cf9..1a50c0739efe 100644
--- a/lldb/test/functionalities/thread/create_during_step/TestCreateDuringStep.py
+++ b/lldb/test/functionalities/thread/create_during_step/TestCreateDuringStep.py
@@ -12,7 +12,7 @@ class CreateDuringStepTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_step_inst_with_dsym(self):
@@ -20,7 +20,7 @@ class CreateDuringStepTestCase(TestBase):
         self.buildDsym(dictionary=self.getBuildFlags())
         self.create_during_step_inst_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_step_over_with_dsym(self):
@@ -28,7 +28,7 @@ class CreateDuringStepTestCase(TestBase):
         self.buildDsym(dictionary=self.getBuildFlags())
         self.create_during_step_over_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_step_in_with_dsym(self):
diff --git a/lldb/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py b/lldb/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py
index 378ad28acc50..539e7a0dbd2f 100644
--- a/lldb/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py
+++ b/lldb/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py
@@ -12,7 +12,7 @@ class ExitDuringBreakpointTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/functionalities/thread/exit_during_step/TestExitDuringStep.py b/lldb/test/functionalities/thread/exit_during_step/TestExitDuringStep.py
index 1c8e304131be..837d1a150d0c 100644
--- a/lldb/test/functionalities/thread/exit_during_step/TestExitDuringStep.py
+++ b/lldb/test/functionalities/thread/exit_during_step/TestExitDuringStep.py
@@ -12,7 +12,7 @@ class ExitDuringStepTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_thread_state_is_stopped_with_dsym(self):
@@ -29,21 +29,21 @@ class ExitDuringStepTestCase(TestBase):
         self.buildDwarf(dictionary=self.getBuildFlags())
         self.thread_state_is_stopped()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test thread exit during step handling."""
         self.buildDsym(dictionary=self.getBuildFlags())
         self.exit_during_step_inst_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_step_over_with_dsym(self):
         """Test thread exit during step-over handling."""
         self.buildDsym(dictionary=self.getBuildFlags())
         self.exit_during_step_over_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_step_in_with_dsym(self):
         """Test thread exit during step-in handling."""
diff --git a/lldb/test/functionalities/thread/jump/TestThreadJump.py b/lldb/test/functionalities/thread/jump/TestThreadJump.py
index f2122be91264..d1c279fd7d2e 100644
--- a/lldb/test/functionalities/thread/jump/TestThreadJump.py
+++ b/lldb/test/functionalities/thread/jump/TestThreadJump.py
@@ -12,7 +12,7 @@ class ThreadJumpTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test thread jump handling."""
diff --git a/lldb/test/functionalities/thread/multi_break/TestMultipleBreakpoints.py b/lldb/test/functionalities/thread/multi_break/TestMultipleBreakpoints.py
index 52cb19685d3e..b0358e6b4575 100644
--- a/lldb/test/functionalities/thread/multi_break/TestMultipleBreakpoints.py
+++ b/lldb/test/functionalities/thread/multi_break/TestMultipleBreakpoints.py
@@ -12,7 +12,7 @@ class MultipleBreakpointTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/functionalities/thread/state/TestThreadStates.py b/lldb/test/functionalities/thread/state/TestThreadStates.py
index b61d9fb7d64d..59db6037bcf9 100644
--- a/lldb/test/functionalities/thread/state/TestThreadStates.py
+++ b/lldb/test/functionalities/thread/state/TestThreadStates.py
@@ -12,7 +12,7 @@ class ThreadStateTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @expectedFailureDarwin("rdar://15367566")
     def test_state_after_breakpoint_with_dsym(self):
@@ -29,7 +29,7 @@ class ThreadStateTestCase(TestBase):
         self.buildDwarf(dictionary=self.getBuildFlags(use_cpp11=False))
         self.thread_state_after_breakpoint_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_state_after_continue_with_dsym(self):
         """Test thread state after continue."""
@@ -42,7 +42,7 @@ class ThreadStateTestCase(TestBase):
         self.buildDwarf(dictionary=self.getBuildFlags(use_cpp11=False))
         self.thread_state_after_continue_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_state_after_expression_with_dsym(self):
         """Test thread state after expression."""
@@ -55,7 +55,7 @@ class ThreadStateTestCase(TestBase):
         self.buildDwarf(dictionary=self.getBuildFlags(use_cpp11=False))
         self.thread_state_after_continue_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @unittest2.expectedFailure("llvm.org/pr16172") # thread states not properly maintained
     def test_process_interrupt_with_dsym(self):
@@ -70,7 +70,7 @@ class ThreadStateTestCase(TestBase):
         self.buildDwarf(dictionary=self.getBuildFlags(use_cpp11=False))
         self.process_interrupt_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @unittest2.expectedFailure("llvm.org/pr15824") # thread states not properly maintained
     def test_process_state_with_dsym(self):
diff --git a/lldb/test/functionalities/thread/thread_exit/TestThreadExit.py b/lldb/test/functionalities/thread/thread_exit/TestThreadExit.py
index 1e30185cbdb5..432472307f9e 100644
--- a/lldb/test/functionalities/thread/thread_exit/TestThreadExit.py
+++ b/lldb/test/functionalities/thread/thread_exit/TestThreadExit.py
@@ -12,7 +12,7 @@ class ThreadExitTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/functionalities/thread/thread_specific_break/TestThreadSpecificBreakpoint.py b/lldb/test/functionalities/thread/thread_specific_break/TestThreadSpecificBreakpoint.py
index 1d32729d1c28..c3525c37ad69 100644
--- a/lldb/test/functionalities/thread/thread_specific_break/TestThreadSpecificBreakpoint.py
+++ b/lldb/test/functionalities/thread/thread_specific_break/TestThreadSpecificBreakpoint.py
@@ -12,7 +12,7 @@ class ThreadSpecificBreakTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_python(self):
diff --git a/lldb/test/functionalities/tty/TestTerminal.py b/lldb/test/functionalities/tty/TestTerminal.py
index fb935e6e10ff..e883056bb592 100644
--- a/lldb/test/functionalities/tty/TestTerminal.py
+++ b/lldb/test/functionalities/tty/TestTerminal.py
@@ -15,7 +15,7 @@ class LaunchInTerminalTestCase(TestBase):
     # Darwin is the only platform that I know of that supports optionally launching
     # a program in a separate terminal window. It would be great if other platforms
     # added support for this.
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
 
 
     # If the test is being run under sudo, the spawned terminal won't retain that elevated
diff --git a/lldb/test/functionalities/type_completion/TestTypeCompletion.py b/lldb/test/functionalities/type_completion/TestTypeCompletion.py
index eddb6cd5a430..361aa4a7867d 100644
--- a/lldb/test/functionalities/type_completion/TestTypeCompletion.py
+++ b/lldb/test/functionalities/type_completion/TestTypeCompletion.py
@@ -12,7 +12,7 @@ class TypeCompletionTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Check that types only get completed when necessary."""
diff --git a/lldb/test/functionalities/unwind/noreturn/TestNoreturnUnwind.py b/lldb/test/functionalities/unwind/noreturn/TestNoreturnUnwind.py
index 2250ebfcb452..edc154dbb953 100644
--- a/lldb/test/functionalities/unwind/noreturn/TestNoreturnUnwind.py
+++ b/lldb/test/functionalities/unwind/noreturn/TestNoreturnUnwind.py
@@ -11,7 +11,7 @@ import lldbutil
 class NoreturnUnwind(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         """Test that we can backtrace correctly with 'noreturn' functions on the stack"""
diff --git a/lldb/test/functionalities/unwind/sigtramp/TestSigtrampUnwind.py b/lldb/test/functionalities/unwind/sigtramp/TestSigtrampUnwind.py
index 1c2e8edbc481..541fe51e939a 100644
--- a/lldb/test/functionalities/unwind/sigtramp/TestSigtrampUnwind.py
+++ b/lldb/test/functionalities/unwind/sigtramp/TestSigtrampUnwind.py
@@ -13,7 +13,7 @@ class SigtrampUnwind(TestBase):
 
     # On different platforms the "_sigtramp" and "__kill" frames are likely to be different.
     # This test could probably be adapted to run on linux/*bsd easily enough.
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         """Test that we can backtrace correctly with _sigtramp on the stack"""
@@ -21,7 +21,7 @@ class SigtrampUnwind(TestBase):
         self.setTearDownCleanup()
         self.sigtramp_unwind_tests()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf (self):
         """Test that we can backtrace correctly with _sigtramp on the stack"""
diff --git a/lldb/test/functionalities/value_md5_crash/TestValueMD5Crash.py b/lldb/test/functionalities/value_md5_crash/TestValueMD5Crash.py
index ad0e309dd7ca..fa1a290c9891 100644
--- a/lldb/test/functionalities/value_md5_crash/TestValueMD5Crash.py
+++ b/lldb/test/functionalities/value_md5_crash/TestValueMD5Crash.py
@@ -12,7 +12,7 @@ class ValueMD5CrashTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Verify that the hash computing logic for ValueObject's values can't crash us."""
diff --git a/lldb/test/functionalities/watchpoint/hello_watchlocation/TestWatchLocation.py b/lldb/test/functionalities/watchpoint/hello_watchlocation/TestWatchLocation.py
index 3cced4e081b7..302bb2f540ca 100644
--- a/lldb/test/functionalities/watchpoint/hello_watchlocation/TestWatchLocation.py
+++ b/lldb/test/functionalities/watchpoint/hello_watchlocation/TestWatchLocation.py
@@ -13,7 +13,7 @@ class HelloWatchLocationTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_hello_watchlocation_with_dsym(self):
         """Test watching a location with '-s size' option."""
diff --git a/lldb/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py b/lldb/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py
index 09936c8febbd..fbe2d4798bf0 100644
--- a/lldb/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py
+++ b/lldb/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py
@@ -13,7 +13,7 @@ class WatchpointForMultipleThreadsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_multiple_threads_with_dsym(self):
         """Test that lldb watchpoint works for multiple threads."""
@@ -30,7 +30,7 @@ class WatchpointForMultipleThreadsTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d)
         self.hello_multiple_threads()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_multiple_threads_wp_set_and_then_delete_with_dsym(self):
         """Test that lldb watchpoint works for multiple threads, and after the watchpoint is deleted, the watchpoint event should no longer fires."""
diff --git a/lldb/test/functionalities/watchpoint/step_over_watchpoint/TestStepOverWatchpoint.py b/lldb/test/functionalities/watchpoint/step_over_watchpoint/TestStepOverWatchpoint.py
index 30947f4a3f93..d4bccf9e8520 100644
--- a/lldb/test/functionalities/watchpoint/step_over_watchpoint/TestStepOverWatchpoint.py
+++ b/lldb/test/functionalities/watchpoint/step_over_watchpoint/TestStepOverWatchpoint.py
@@ -13,7 +13,7 @@ class TestStepOverWatchpoint(TestBase):
     def getCategories(self):
         return ['basic_process']
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test stepping over watchpoints."""
diff --git a/lldb/test/functionalities/watchpoint/watchpoint_commands/TestWatchpointCommands.py b/lldb/test/functionalities/watchpoint/watchpoint_commands/TestWatchpointCommands.py
index fa32b37bd387..74c5d11d73db 100644
--- a/lldb/test/functionalities/watchpoint/watchpoint_commands/TestWatchpointCommands.py
+++ b/lldb/test/functionalities/watchpoint/watchpoint_commands/TestWatchpointCommands.py
@@ -26,7 +26,7 @@ class WatchpointCommandsTestCase(TestBase):
         self.exe_name = self.testMethodName
         self.d = {'C_SOURCES': self.source, 'EXE': self.exe_name}
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rw_watchpoint_with_dsym(self):
         """Test read_write watchpoint and expect to stop two times."""
@@ -41,7 +41,7 @@ class WatchpointCommandsTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d)
         self.normal_read_write_watchpoint()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rw_watchpoint_delete_with_dsym(self):
         """Test delete watchpoint and expect not to stop for watchpoint."""
@@ -56,7 +56,7 @@ class WatchpointCommandsTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d)
         self.delete_read_write_watchpoint()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rw_watchpoint_set_ignore_count_with_dsym(self):
         """Test watchpoint ignore count and expect to not to stop at all."""
@@ -71,7 +71,7 @@ class WatchpointCommandsTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d)
         self.ignore_read_write_watchpoint()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rw_disable_after_first_stop_with_dsym(self):
         """Test read_write watchpoint but disable it after the first stop."""
@@ -86,7 +86,7 @@ class WatchpointCommandsTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d)
         self.read_write_watchpoint_disable_after_first_stop()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_rw_disable_then_enable_with_dsym(self):
         """Test read_write watchpoint, disable initially, then enable it."""
diff --git a/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandLLDB.py b/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandLLDB.py
index ac04cd9b1682..025d1f40bcca 100644
--- a/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandLLDB.py
+++ b/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandLLDB.py
@@ -25,7 +25,7 @@ class WatchpointLLDBCommandTestCase(TestBase):
         self.exe_name = 'a%d.out' % self.test_number
         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_command_with_dsym(self):
         """Test 'watchpoint command'."""
@@ -40,7 +40,7 @@ class WatchpointLLDBCommandTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d)
         self.watchpoint_command()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_command_can_disable_a_watchpoint_with_dsym(self):
         """Test that 'watchpoint command' action can disable a watchpoint after it is triggered."""
diff --git a/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandPython.py b/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandPython.py
index 4b09b9fc181c..64695ab72b9e 100644
--- a/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandPython.py
+++ b/lldb/test/functionalities/watchpoint/watchpoint_commands/command/TestWatchpointCommandPython.py
@@ -25,7 +25,7 @@ class WatchpointPythonCommandTestCase(TestBase):
         self.exe_name = self.testMethodName
         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_command_with_dsym(self):
         """Test 'watchpoint command'."""
diff --git a/lldb/test/functionalities/watchpoint/watchpoint_commands/condition/TestWatchpointConditionCmd.py b/lldb/test/functionalities/watchpoint/watchpoint_commands/condition/TestWatchpointConditionCmd.py
index 193b6f1f5f74..21e1d992d264 100644
--- a/lldb/test/functionalities/watchpoint/watchpoint_commands/condition/TestWatchpointConditionCmd.py
+++ b/lldb/test/functionalities/watchpoint/watchpoint_commands/condition/TestWatchpointConditionCmd.py
@@ -25,7 +25,7 @@ class WatchpointConditionCmdTestCase(TestBase):
         self.exe_name = self.testMethodName
         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_cond_with_dsym(self):
         """Test watchpoint condition."""
diff --git a/lldb/test/functionalities/watchpoint/watchpoint_events/TestWatchpointEvents.py b/lldb/test/functionalities/watchpoint/watchpoint_events/TestWatchpointEvents.py
index 7dd86f25d51b..25f10a9d8047 100644
--- a/lldb/test/functionalities/watchpoint/watchpoint_events/TestWatchpointEvents.py
+++ b/lldb/test/functionalities/watchpoint/watchpoint_events/TestWatchpointEvents.py
@@ -10,7 +10,7 @@ class TestWatchpointEvents (TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
diff --git a/lldb/test/functionalities/watchpoint/watchpoint_set_command/TestWatchLocationWithWatchSet.py b/lldb/test/functionalities/watchpoint/watchpoint_set_command/TestWatchLocationWithWatchSet.py
index 0b8d1d6a45c6..a711e7c04576 100644
--- a/lldb/test/functionalities/watchpoint/watchpoint_set_command/TestWatchLocationWithWatchSet.py
+++ b/lldb/test/functionalities/watchpoint/watchpoint_set_command/TestWatchLocationWithWatchSet.py
@@ -12,7 +12,7 @@ class WatchLocationUsingWatchpointSetTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchlocation_with_dsym_using_watchpoint_set(self):
         """Test watching a location with 'watchpoint set expression -w write -s size' option."""
diff --git a/lldb/test/lang/c/array_types/TestArrayTypes.py b/lldb/test/lang/c/array_types/TestArrayTypes.py
index 3e814bdd313d..5be2da1517e5 100644
--- a/lldb/test/lang/c/array_types/TestArrayTypes.py
+++ b/lldb/test/lang/c/array_types/TestArrayTypes.py
@@ -10,14 +10,14 @@ class ArrayTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test 'frame variable var_name' on some variables with array types."""
         self.buildDsym()
         self.array_types()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test    
     @dsym_test
     def test_with_dsym_and_python_api(self):
diff --git a/lldb/test/lang/c/bitfields/TestBitfields.py b/lldb/test/lang/c/bitfields/TestBitfields.py
index 573d161ff756..2597d6af7ac3 100644
--- a/lldb/test/lang/c/bitfields/TestBitfields.py
+++ b/lldb/test/lang/c/bitfields/TestBitfields.py
@@ -10,14 +10,14 @@ class BitfieldsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test 'frame variable ...' on a variable with bitfields."""
         self.buildDsym()
         self.bitfields_variable()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -26,7 +26,7 @@ class BitfieldsTestCase(TestBase):
         self.bitfields_variable_python()
 
     @dwarf_test
-    @unittest2.skipIf(sys.platform.startswith("win32"), "BitFields exhibit crashes in record layout on Windows (http://llvm.org/pr21800)")
+    @skipIfWindows # BitFields exhibit crashes in record layout on Windows (http://llvm.org/pr21800)
     def test_with_dwarf_and_run_command(self):
         """Test 'frame variable ...' on a variable with bitfields."""
         self.buildDwarf()
@@ -34,7 +34,7 @@ class BitfieldsTestCase(TestBase):
 
     @python_api_test
     @dwarf_test
-    @unittest2.skipIf(sys.platform.startswith("win32"), "BitFields exhibit crashes in record layout on Windows (http://llvm.org/pr21800)")
+    @skipIfWindows # BitFields exhibit crashes in record layout on Windows (http://llvm.org/pr21800)
     @expectedFailureGcc # GCC (4.6/4.7) generates incorrect code with unnamed bitfields.
     def test_with_dwarf_and_python_api(self):
         """Use Python APIs to inspect a bitfields variable."""
diff --git a/lldb/test/lang/c/enum_types/TestEnumTypes.py b/lldb/test/lang/c/enum_types/TestEnumTypes.py
index a0f8217a05b6..7ca36e1c236a 100644
--- a/lldb/test/lang/c/enum_types/TestEnumTypes.py
+++ b/lldb/test/lang/c/enum_types/TestEnumTypes.py
@@ -10,7 +10,7 @@ class EnumTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test 'image lookup -t days' and check for correct display and enum value printing."""
diff --git a/lldb/test/lang/c/forward/TestForwardDeclaration.py b/lldb/test/lang/c/forward/TestForwardDeclaration.py
index db088ab7d0de..6fb0eb9645a7 100644
--- a/lldb/test/lang/c/forward/TestForwardDeclaration.py
+++ b/lldb/test/lang/c/forward/TestForwardDeclaration.py
@@ -10,7 +10,7 @@ class ForwardDeclarationTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Display *bar_ptr when stopped on a function with forward declaration of struct bar."""
diff --git a/lldb/test/lang/c/function_types/TestFunctionTypes.py b/lldb/test/lang/c/function_types/TestFunctionTypes.py
index 9b4241cdf364..82c5036327c3 100644
--- a/lldb/test/lang/c/function_types/TestFunctionTypes.py
+++ b/lldb/test/lang/c/function_types/TestFunctionTypes.py
@@ -10,7 +10,7 @@ class FunctionTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test 'callback' has function ptr type, then break on the function."""
@@ -23,7 +23,7 @@ class FunctionTypesTestCase(TestBase):
         self.buildDwarf()
         self.function_types()
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_pointers_with_dsym(self):
         """Test that a function pointer to 'printf' works and can be called."""
diff --git a/lldb/test/lang/c/global_variables/TestGlobalVariables.py b/lldb/test/lang/c/global_variables/TestGlobalVariables.py
index 0cc78dccebdd..ab93bf6741b5 100644
--- a/lldb/test/lang/c/global_variables/TestGlobalVariables.py
+++ b/lldb/test/lang/c/global_variables/TestGlobalVariables.py
@@ -10,7 +10,7 @@ class GlobalVariablesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test 'frame variable --scope --no-args' which omits args and shows scopes."""
diff --git a/lldb/test/lang/c/set_values/TestSetValues.py b/lldb/test/lang/c/set_values/TestSetValues.py
index da12f6e37d6f..f914cfae8c36 100644
--- a/lldb/test/lang/c/set_values/TestSetValues.py
+++ b/lldb/test/lang/c/set_values/TestSetValues.py
@@ -10,7 +10,7 @@ class SetValuesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test settings and readings of program variables."""
diff --git a/lldb/test/lang/c/stepping/TestStepAndBreakpoints.py b/lldb/test/lang/c/stepping/TestStepAndBreakpoints.py
index 9d3b3c6bd296..903b2fe7f492 100644
--- a/lldb/test/lang/c/stepping/TestStepAndBreakpoints.py
+++ b/lldb/test/lang/c/stepping/TestStepAndBreakpoints.py
@@ -13,7 +13,7 @@ class TestCStepping(TestBase):
     def getCategories(self):
         return ['basic_process']
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
diff --git a/lldb/test/lang/c/stepping/TestThreadStepping.py b/lldb/test/lang/c/stepping/TestThreadStepping.py
index 747ef4af3149..13c8ce88ddcd 100644
--- a/lldb/test/lang/c/stepping/TestThreadStepping.py
+++ b/lldb/test/lang/c/stepping/TestThreadStepping.py
@@ -13,7 +13,7 @@ class ThreadSteppingTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_step_out_with_dsym_and_run_command(self):
         """Exercise thread step-out and frame select followed by thread step-out."""
diff --git a/lldb/test/lang/c/strings/TestCStrings.py b/lldb/test/lang/c/strings/TestCStrings.py
index 636777e50775..ee6348160f9a 100644
--- a/lldb/test/lang/c/strings/TestCStrings.py
+++ b/lldb/test/lang/c/strings/TestCStrings.py
@@ -9,7 +9,7 @@ class CStringsTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Tests that C strings work as expected in expressions"""
diff --git a/lldb/test/lang/c/tls_globals/TestTlsGlobals.py b/lldb/test/lang/c/tls_globals/TestTlsGlobals.py
index 1141962d844d..b450bfc5d1c7 100644
--- a/lldb/test/lang/c/tls_globals/TestTlsGlobals.py
+++ b/lldb/test/lang/c/tls_globals/TestTlsGlobals.py
@@ -10,7 +10,7 @@ class TlsGlobalTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     @unittest2.expectedFailure("rdar://7796742")
     def test_with_dsym(self):
diff --git a/lldb/test/lang/cpp/bool/TestCPPBool.py b/lldb/test/lang/cpp/bool/TestCPPBool.py
index a8ee86e5010b..fc1c57416e93 100644
--- a/lldb/test/lang/cpp/bool/TestCPPBool.py
+++ b/lldb/test/lang/cpp/bool/TestCPPBool.py
@@ -9,7 +9,7 @@ class CPPBoolTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that bool types work in the expression parser"""
diff --git a/lldb/test/lang/cpp/breakpoints/TestCPPBreakpoints.py b/lldb/test/lang/cpp/breakpoints/TestCPPBreakpoints.py
index 675e5b42c3f9..a85652310f89 100644
--- a/lldb/test/lang/cpp/breakpoints/TestCPPBreakpoints.py
+++ b/lldb/test/lang/cpp/breakpoints/TestCPPBreakpoints.py
@@ -11,7 +11,7 @@ class CPPBreakpointTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test a sequence of breakpoint command add, list, and delete."""
diff --git a/lldb/test/lang/cpp/call-function/TestCallCPPFunction.py b/lldb/test/lang/cpp/call-function/TestCallCPPFunction.py
index a026f14de121..cb0725a952c3 100644
--- a/lldb/test/lang/cpp/call-function/TestCallCPPFunction.py
+++ b/lldb/test/lang/cpp/call-function/TestCallCPPFunction.py
@@ -10,7 +10,7 @@ class CallCPPFunctionTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test calling a function by basename"""
diff --git a/lldb/test/lang/cpp/char1632_t/TestChar1632T.py b/lldb/test/lang/cpp/char1632_t/TestChar1632T.py
index b6995fd0345b..75156958ed36 100644
--- a/lldb/test/lang/cpp/char1632_t/TestChar1632T.py
+++ b/lldb/test/lang/cpp/char1632_t/TestChar1632T.py
@@ -13,7 +13,7 @@ class Char1632TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test that the C++11 support for char16_t and char32_t works correctly."""
diff --git a/lldb/test/lang/cpp/class_static/TestStaticVariables.py b/lldb/test/lang/cpp/class_static/TestStaticVariables.py
index fad69a2d13c5..c2d2024ef8e1 100644
--- a/lldb/test/lang/cpp/class_static/TestStaticVariables.py
+++ b/lldb/test/lang/cpp/class_static/TestStaticVariables.py
@@ -13,7 +13,7 @@ class StaticVariableTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
     failing_compilers = ['clang', 'gcc']
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that file and class static variables display correctly."""
@@ -26,7 +26,7 @@ class StaticVariableTestCase(TestBase):
         self.buildDwarf()
         self.static_variable_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureClang(9980907)
     @expectedFailureGcc(9980907)
     @python_api_test
diff --git a/lldb/test/lang/cpp/class_types/TestClassTypes.py b/lldb/test/lang/cpp/class_types/TestClassTypes.py
index f988845599eb..41313df9e37d 100644
--- a/lldb/test/lang/cpp/class_types/TestClassTypes.py
+++ b/lldb/test/lang/cpp/class_types/TestClassTypes.py
@@ -12,14 +12,14 @@ class ClassTypesTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
     failing_compilers = ['clang', 'gcc']
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test 'frame variable this' when stopped on a class constructor."""
         self.buildDsym()
         self.class_types()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -43,7 +43,7 @@ class ClassTypesTestCase(TestBase):
         self.buildDwarf()
         self.breakpoint_creation_by_filespec_python()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     # rdar://problem/8557478
     # test/class_types test failures: runCmd: expr this->m_c_int
     @dsym_test
@@ -60,7 +60,7 @@ class ClassTypesTestCase(TestBase):
         self.buildDwarf()
         self.class_types_expr_parser()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     # rdar://problem/8557478
     # test/class_types test failures: runCmd: expr this->m_c_int
     @dsym_test
diff --git a/lldb/test/lang/cpp/class_types/TestClassTypesDisassembly.py b/lldb/test/lang/cpp/class_types/TestClassTypesDisassembly.py
index 38452f1410ba..2e4011475917 100644
--- a/lldb/test/lang/cpp/class_types/TestClassTypesDisassembly.py
+++ b/lldb/test/lang/cpp/class_types/TestClassTypesDisassembly.py
@@ -13,7 +13,7 @@ class IterateFrameAndDisassembleTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
     failing_compilers = ['clang', 'gcc']
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Disassemble each call frame when stopped on C's constructor."""
@@ -26,7 +26,7 @@ class IterateFrameAndDisassembleTestCase(TestBase):
         self.buildDwarf()
         self.disassemble_call_stack()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
diff --git a/lldb/test/lang/cpp/diamond/TestDiamond.py b/lldb/test/lang/cpp/diamond/TestDiamond.py
index 247da482a195..fd1ca36b607a 100644
--- a/lldb/test/lang/cpp/diamond/TestDiamond.py
+++ b/lldb/test/lang/cpp/diamond/TestDiamond.py
@@ -9,7 +9,7 @@ class CPPTestDiamondInheritance(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that virtual base classes work in when SBValue objects are used to explore the variable value"""
diff --git a/lldb/test/lang/cpp/dynamic-value/TestCppValueCast.py b/lldb/test/lang/cpp/dynamic-value/TestCppValueCast.py
index e3fbcfc21240..23a9fc503b87 100644
--- a/lldb/test/lang/cpp/dynamic-value/TestCppValueCast.py
+++ b/lldb/test/lang/cpp/dynamic-value/TestCppValueCast.py
@@ -13,7 +13,7 @@ class CppValueCastTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     @unittest2.expectedFailure("rdar://problem/10808472 SBValue::Cast test case is failing (virtual inheritance)")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_value_cast_with_dsym_and_virtual_inheritance(self):
@@ -31,7 +31,7 @@ class CppValueCastTestCase(TestBase):
         self.setTearDownCleanup(dictionary=self.d_virtual)
         self.do_sbvalue_cast(self.exe_name)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_value_cast_with_dsym_and_regular_inheritance(self):
diff --git a/lldb/test/lang/cpp/dynamic-value/TestDynamicValue.py b/lldb/test/lang/cpp/dynamic-value/TestDynamicValue.py
index 576d9642ebc5..1de0a7b917fd 100644
--- a/lldb/test/lang/cpp/dynamic-value/TestDynamicValue.py
+++ b/lldb/test/lang/cpp/dynamic-value/TestDynamicValue.py
@@ -12,7 +12,7 @@ class DynamicValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_dynamic_vals_with_dsym(self):
diff --git a/lldb/test/lang/cpp/enum_types/TestCPP11EnumTypes.py b/lldb/test/lang/cpp/enum_types/TestCPP11EnumTypes.py
index 77dbaea56d4c..014a441625d8 100644
--- a/lldb/test/lang/cpp/enum_types/TestCPP11EnumTypes.py
+++ b/lldb/test/lang/cpp/enum_types/TestCPP11EnumTypes.py
@@ -10,56 +10,56 @@ class CPP11EnumTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_int8_t(self):
         """Test C++11 enumeration class types as int8_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=int8_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_int16_t(self):
         """Test C++11 enumeration class types as int16_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=int16_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_int32_t(self):
         """Test C++11 enumeration class types as int32_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=int32_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_int64_t(self):
         """Test C++11 enumeration class types as int64_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=int64_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_uint8_t(self):
         """Test C++11 enumeration class types as uint8_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=uint8_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_uint16_t(self):
         """Test C++11 enumeration class types as uint16_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=uint16_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_uint32_t(self):
         """Test C++11 enumeration class types as uint32_t types."""
         self.buildDsym(dictionary={'CFLAGS_EXTRAS': '"-DTEST_BLOCK_CAPTURED_VARS=uint32_t"'})
         self.image_lookup_for_enum_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_uint64_t(self):
         """Test C++11 enumeration class types as uint64_t types."""
diff --git a/lldb/test/lang/cpp/exceptions/TestCPPExceptionBreakpoints.py b/lldb/test/lang/cpp/exceptions/TestCPPExceptionBreakpoints.py
index bb81d6d0d351..3a896d44b5ee 100644
--- a/lldb/test/lang/cpp/exceptions/TestCPPExceptionBreakpoints.py
+++ b/lldb/test/lang/cpp/exceptions/TestCPPExceptionBreakpoints.py
@@ -12,7 +12,7 @@ class CPPBreakpointTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test lldb exception breakpoint command for CPP."""
diff --git a/lldb/test/lang/cpp/namespace/TestNamespace.py b/lldb/test/lang/cpp/namespace/TestNamespace.py
index 4e249264b1cd..d50490fe87d2 100644
--- a/lldb/test/lang/cpp/namespace/TestNamespace.py
+++ b/lldb/test/lang/cpp/namespace/TestNamespace.py
@@ -13,7 +13,7 @@ class NamespaceTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     # rdar://problem/8668674
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that anonymous and named namespace variables display correctly."""
diff --git a/lldb/test/lang/cpp/overloaded-functions/TestOverloadedFunctions.py b/lldb/test/lang/cpp/overloaded-functions/TestOverloadedFunctions.py
index 987b15f3b202..0ae186ff2864 100644
--- a/lldb/test/lang/cpp/overloaded-functions/TestOverloadedFunctions.py
+++ b/lldb/test/lang/cpp/overloaded-functions/TestOverloadedFunctions.py
@@ -10,7 +10,7 @@ class CPPStaticMethodsTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that functions with the same name are resolved correctly"""
diff --git a/lldb/test/lang/cpp/rdar12991846/TestRdar12991846.py b/lldb/test/lang/cpp/rdar12991846/TestRdar12991846.py
index 35217c17d79f..9e48b3d26b09 100644
--- a/lldb/test/lang/cpp/rdar12991846/TestRdar12991846.py
+++ b/lldb/test/lang/cpp/rdar12991846/TestRdar12991846.py
@@ -27,7 +27,7 @@ class Rdar12991846TestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     @unittest2.expectedFailure("rdar://18684408")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr1_with_dsym(self):
         """Test that the expression parser returns proper Unicode strings."""
@@ -42,7 +42,7 @@ class Rdar12991846TestCase(TestBase):
         self.rdar12991846(expr=1)
 
     @unittest2.expectedFailure("rdar://18684408")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr2_with_dsym(self):
         """Test that the expression parser returns proper Unicode strings."""
@@ -57,7 +57,7 @@ class Rdar12991846TestCase(TestBase):
         self.rdar12991846(expr=2)
 
     @unittest2.expectedFailure("rdar://18684408")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr3_with_dsym(self):
         """Test that the expression parser returns proper Unicode strings."""
diff --git a/lldb/test/lang/cpp/rvalue-references/TestRvalueReferences.py b/lldb/test/lang/cpp/rvalue-references/TestRvalueReferences.py
index 9b00f903c51f..3a855bdcfa8e 100644
--- a/lldb/test/lang/cpp/rvalue-references/TestRvalueReferences.py
+++ b/lldb/test/lang/cpp/rvalue-references/TestRvalueReferences.py
@@ -10,7 +10,7 @@ class RvalueReferencesTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailureClang("rdar://problem/11479676")
     @dsym_test
     def test_with_dsym_and_run_command(self):
diff --git a/lldb/test/lang/cpp/signed_types/TestSignedTypes.py b/lldb/test/lang/cpp/signed_types/TestSignedTypes.py
index f4d333321c8a..36c2b6d414ec 100644
--- a/lldb/test/lang/cpp/signed_types/TestSignedTypes.py
+++ b/lldb/test/lang/cpp/signed_types/TestSignedTypes.py
@@ -13,7 +13,7 @@ class UnsignedTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test that variables with signed types display correctly."""
diff --git a/lldb/test/lang/cpp/static_members/TestCPPStaticMembers.py b/lldb/test/lang/cpp/static_members/TestCPPStaticMembers.py
index d49b86a06a6d..83516b724836 100644
--- a/lldb/test/lang/cpp/static_members/TestCPPStaticMembers.py
+++ b/lldb/test/lang/cpp/static_members/TestCPPStaticMembers.py
@@ -9,7 +9,7 @@ class CPPStaticMembersTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @unittest2.expectedFailure # llvm.org/pr15401
     @dsym_test
     def test_with_dsym_and_run_command(self):
diff --git a/lldb/test/lang/cpp/static_methods/TestCPPStaticMethods.py b/lldb/test/lang/cpp/static_methods/TestCPPStaticMethods.py
index 25dec6f465bc..8fa358c7b513 100644
--- a/lldb/test/lang/cpp/static_methods/TestCPPStaticMethods.py
+++ b/lldb/test/lang/cpp/static_methods/TestCPPStaticMethods.py
@@ -10,7 +10,7 @@ class CPPStaticMethodsTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that static methods are properly distinguished from regular methods"""
diff --git a/lldb/test/lang/cpp/stl/TestSTL.py b/lldb/test/lang/cpp/stl/TestSTL.py
index 309d169eca15..0b7d8d3fedbe 100644
--- a/lldb/test/lang/cpp/stl/TestSTL.py
+++ b/lldb/test/lang/cpp/stl/TestSTL.py
@@ -14,7 +14,7 @@ class STLTestCase(TestBase):
 
     # rdar://problem/10400981
     @unittest2.expectedFailure
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test some expressions involving STL data types."""
diff --git a/lldb/test/lang/cpp/this/TestCPPThis.py b/lldb/test/lang/cpp/this/TestCPPThis.py
index 0d059c510732..1e5731e05c7f 100644
--- a/lldb/test/lang/cpp/this/TestCPPThis.py
+++ b/lldb/test/lang/cpp/this/TestCPPThis.py
@@ -9,7 +9,7 @@ class CPPThisTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     #rdar://problem/9962849
     #@expectedFailureClang
     @dsym_test
diff --git a/lldb/test/lang/cpp/unique-types/TestUniqueTypes.py b/lldb/test/lang/cpp/unique-types/TestUniqueTypes.py
index e07c02e0cd0d..799e2fdf23b8 100644
--- a/lldb/test/lang/cpp/unique-types/TestUniqueTypes.py
+++ b/lldb/test/lang/cpp/unique-types/TestUniqueTypes.py
@@ -11,7 +11,7 @@ class UniqueTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test for unique types of std::vector<long> and std::vector<short>."""
diff --git a/lldb/test/lang/cpp/unsigned_types/TestUnsignedTypes.py b/lldb/test/lang/cpp/unsigned_types/TestUnsignedTypes.py
index 66b4a5493a0b..5959d863500c 100644
--- a/lldb/test/lang/cpp/unsigned_types/TestUnsignedTypes.py
+++ b/lldb/test/lang/cpp/unsigned_types/TestUnsignedTypes.py
@@ -13,7 +13,7 @@ class UnsignedTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test that variables with unsigned types display correctly."""
diff --git a/lldb/test/lang/cpp/virtual/TestVirtual.py b/lldb/test/lang/cpp/virtual/TestVirtual.py
index e2c09cd338a1..797afaf8c608 100644
--- a/lldb/test/lang/cpp/virtual/TestVirtual.py
+++ b/lldb/test/lang/cpp/virtual/TestVirtual.py
@@ -22,8 +22,8 @@ class CppVirtualMadness(TestBase):
     # Assert message.
     PRINTF_OUTPUT_GROKKED = "The printf output from compiled code is parsed correctly"
 
-    @unittest2.skipIf(sys.platform.startswith("win32"), "Process::GetSTDOUT unsupported on Windows.  This test should be re-written to use stdout re-direction")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipIfWindows # Process::GetSTDOUT unsupported on Windows.  This test should be re-written to use stdout re-direction
+    @skipUnlessDarwin
     def test_virtual_madness_dsym(self):
         """Test that expression works correctly with virtual inheritance as well as virtual function."""
         self.buildDsym()
diff --git a/lldb/test/lang/cpp/wchar_t/TestCxxWCharT.py b/lldb/test/lang/cpp/wchar_t/TestCxxWCharT.py
index 10804c1eca24..80e11303b33a 100644
--- a/lldb/test/lang/cpp/wchar_t/TestCxxWCharT.py
+++ b/lldb/test/lang/cpp/wchar_t/TestCxxWCharT.py
@@ -13,7 +13,7 @@ class CxxWCharTTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test that C++ supports wchar_t correctly."""
diff --git a/lldb/test/lang/objc/blocks/TestObjCIvarsInBlocks.py b/lldb/test/lang/objc/blocks/TestObjCIvarsInBlocks.py
index dfb6431d79cd..844f98119062 100644
--- a/lldb/test/lang/objc/blocks/TestObjCIvarsInBlocks.py
+++ b/lldb/test/lang/objc/blocks/TestObjCIvarsInBlocks.py
@@ -10,7 +10,7 @@ class TestObjCIvarsInBlocks(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     # This test requires the 2.0 runtime, so it will fail on i386.
     @expectedFailurei386
     @python_api_test
@@ -20,7 +20,7 @@ class TestObjCIvarsInBlocks(TestBase):
         self.buildDsym()
         self.ivars_in_blocks()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     # This test requires the 2.0 runtime, so it will fail on i386.
     @expectedFailurei386
diff --git a/lldb/test/lang/objc/forward-decl/TestForwardDecl.py b/lldb/test/lang/objc/forward-decl/TestForwardDecl.py
index 0a21399e0f85..89ee9741f7f5 100644
--- a/lldb/test/lang/objc/forward-decl/TestForwardDecl.py
+++ b/lldb/test/lang/objc/forward-decl/TestForwardDecl.py
@@ -10,13 +10,13 @@ class ForwardDeclTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr_with_dsym(self):
         self.buildDsym()
         self.expr()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_expr_with_dwarf(self):
         self.buildDwarf()
diff --git a/lldb/test/lang/objc/foundation/TestConstStrings.py b/lldb/test/lang/objc/foundation/TestConstStrings.py
index cafea53402c7..ca644ba54558 100644
--- a/lldb/test/lang/objc/foundation/TestConstStrings.py
+++ b/lldb/test/lang/objc/foundation/TestConstStrings.py
@@ -9,7 +9,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class ConstStringTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/foundation/TestFoundationDisassembly.py b/lldb/test/lang/objc/foundation/TestFoundationDisassembly.py
index 63b64ab3cec1..4fa78d86cbdc 100644
--- a/lldb/test/lang/objc/foundation/TestFoundationDisassembly.py
+++ b/lldb/test/lang/objc/foundation/TestFoundationDisassembly.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class FoundationDisassembleTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/foundation/TestObjCMethods.py b/lldb/test/lang/objc/foundation/TestObjCMethods.py
index 7f9ecafcd516..a9ae40865c4b 100644
--- a/lldb/test/lang/objc/foundation/TestObjCMethods.py
+++ b/lldb/test/lang/objc/foundation/TestObjCMethods.py
@@ -11,7 +11,7 @@ from lldbtest import *
 import lldbutil
 
 file_index = 0
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class FoundationTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/foundation/TestObjCMethods2.py b/lldb/test/lang/objc/foundation/TestObjCMethods2.py
index fb74e60f0c9a..9f17730ce3fd 100644
--- a/lldb/test/lang/objc/foundation/TestObjCMethods2.py
+++ b/lldb/test/lang/objc/foundation/TestObjCMethods2.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class FoundationTestCase2(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/foundation/TestObjectDescriptionAPI.py b/lldb/test/lang/objc/foundation/TestObjectDescriptionAPI.py
index e2409584600e..39d69b8bffb7 100644
--- a/lldb/test/lang/objc/foundation/TestObjectDescriptionAPI.py
+++ b/lldb/test/lang/objc/foundation/TestObjectDescriptionAPI.py
@@ -13,7 +13,7 @@ class ObjectDescriptionAPITestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     # rdar://problem/10857337
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_find_global_variables_then_object_description_with_dsym(self):
@@ -24,7 +24,7 @@ class ObjectDescriptionAPITestCase(TestBase):
         self.find_global_variables_then_object_description('a.out')
 
     # rdar://problem/10857337
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_find_global_variables_then_object_description_with_dwarf(self):
diff --git a/lldb/test/lang/objc/foundation/TestRuntimeTypes.py b/lldb/test/lang/objc/foundation/TestRuntimeTypes.py
index bcf96b111b18..20e38a62479e 100644
--- a/lldb/test/lang/objc/foundation/TestRuntimeTypes.py
+++ b/lldb/test/lang/objc/foundation/TestRuntimeTypes.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class RuntimeTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/foundation/TestSymbolTable.py b/lldb/test/lang/objc/foundation/TestSymbolTable.py
index 77bb538ee05b..70ca088d2942 100644
--- a/lldb/test/lang/objc/foundation/TestSymbolTable.py
+++ b/lldb/test/lang/objc/foundation/TestSymbolTable.py
@@ -7,7 +7,7 @@ import unittest2
 import lldb
 from lldbtest import *
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class FoundationSymtabTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/hidden-ivars/TestHiddenIvars.py b/lldb/test/lang/objc/hidden-ivars/TestHiddenIvars.py
index 136467f7353a..a7d52b0a2982 100644
--- a/lldb/test/lang/objc/hidden-ivars/TestHiddenIvars.py
+++ b/lldb/test/lang/objc/hidden-ivars/TestHiddenIvars.py
@@ -11,7 +11,7 @@ class HiddenIvarsTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr_with_dsym(self):
         if self.getArchitecture() == 'i386':
@@ -20,7 +20,7 @@ class HiddenIvarsTestCase(TestBase):
             self.buildDsym()
             self.expr(False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr_stripped_with_dsym(self):
         if self.getArchitecture() == 'i386':
@@ -29,7 +29,7 @@ class HiddenIvarsTestCase(TestBase):
             self.buildDsym()
             self.expr(True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_expr_with_dwarf(self):
         if self.getArchitecture() == 'i386':
@@ -38,7 +38,7 @@ class HiddenIvarsTestCase(TestBase):
             self.buildDwarf()
             self.expr(False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_frame_variable_with_dsym(self):
         if self.getArchitecture() == 'i386':
@@ -47,7 +47,7 @@ class HiddenIvarsTestCase(TestBase):
             self.buildDsym()
             self.frame_var(False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_frame_variable_stripped_with_dsym(self):
         if self.getArchitecture() == 'i386':
@@ -56,7 +56,7 @@ class HiddenIvarsTestCase(TestBase):
             self.buildDsym()
             self.frame_var(True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_frame_variable_with_dwarf(self):
         if self.getArchitecture() == 'i386':
@@ -66,7 +66,7 @@ class HiddenIvarsTestCase(TestBase):
             self.frame_var(False)
 
     @unittest2.expectedFailure("rdar://18683637")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_frame_variable_across_modules_with_dsym(self):
         if self.getArchitecture() == 'i386':
@@ -76,7 +76,7 @@ class HiddenIvarsTestCase(TestBase):
             self.frame_var_type_access_across_module()
 
     @unittest2.expectedFailure("rdar://18683637")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_frame_variable_across_modules_with_dwarf(self):
         if self.getArchitecture() == 'i386':
diff --git a/lldb/test/lang/objc/objc++/TestObjCXX.py b/lldb/test/lang/objc/objc++/TestObjCXX.py
index 0658b8498763..eeb2bc8bf02e 100644
--- a/lldb/test/lang/objc/objc++/TestObjCXX.py
+++ b/lldb/test/lang/objc/objc++/TestObjCXX.py
@@ -20,7 +20,7 @@ class ObjCXXTestCase(TestBase):
         self.buildDsym()
         self.do_testObjCXXClasses()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_break_with_dwarf(self):
         """Test ivars of Objective-C++ classes"""
diff --git a/lldb/test/lang/objc/objc-baseclass-sbtype/TestObjCBaseClassSBType.py b/lldb/test/lang/objc/objc-baseclass-sbtype/TestObjCBaseClassSBType.py
index 46cd3cd7a313..d732f6773881 100644
--- a/lldb/test/lang/objc/objc-baseclass-sbtype/TestObjCBaseClassSBType.py
+++ b/lldb/test/lang/objc/objc-baseclass-sbtype/TestObjCBaseClassSBType.py
@@ -12,7 +12,7 @@ class ObjCDynamicValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_baseclass_with_dsym(self):
@@ -23,7 +23,7 @@ class ObjCDynamicValueTestCase(TestBase):
         self.buildDsym()
         self.do_get_baseclass_info()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_get_baseclass_with_dwarf(self):
diff --git a/lldb/test/lang/objc/objc-builtin-types/TestObjCBuiltinTypes.py b/lldb/test/lang/objc/objc-builtin-types/TestObjCBuiltinTypes.py
index 6082ac88a0ac..ad48156384a3 100644
--- a/lldb/test/lang/objc/objc-builtin-types/TestObjCBuiltinTypes.py
+++ b/lldb/test/lang/objc/objc-builtin-types/TestObjCBuiltinTypes.py
@@ -10,7 +10,7 @@ class TestObjCBuiltinTypes(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
 
     @dsym_test
diff --git a/lldb/test/lang/objc/objc-checker/TestObjCCheckers.py b/lldb/test/lang/objc/objc-checker/TestObjCCheckers.py
index b6739cfff067..550ce0e50ddc 100644
--- a/lldb/test/lang/objc/objc-checker/TestObjCCheckers.py
+++ b/lldb/test/lang/objc/objc-checker/TestObjCCheckers.py
@@ -12,7 +12,7 @@ class ObjCCheckerTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_objc_checker_with_dsym(self):
@@ -22,7 +22,7 @@ class ObjCCheckerTestCase(TestBase):
         self.buildDsym()
         self.do_test_checkers()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_objc_checker_with_dwarf(self):
diff --git a/lldb/test/lang/objc/objc-class-method/TestObjCClassMethod.py b/lldb/test/lang/objc/objc-class-method/TestObjCClassMethod.py
index d230391e0245..b3929b97a5e5 100644
--- a/lldb/test/lang/objc/objc-class-method/TestObjCClassMethod.py
+++ b/lldb/test/lang/objc/objc-class-method/TestObjCClassMethod.py
@@ -10,7 +10,7 @@ class TestObjCClassMethod(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
 
     @expectedFailurei386
@@ -20,7 +20,7 @@ class TestObjCClassMethod(TestBase):
         self.buildDsym()
         self.objc_class_method()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailurei386
     @python_api_test
     @dwarf_test
diff --git a/lldb/test/lang/objc/objc-dyn-sbtype/TestObjCDynamicSBType.py b/lldb/test/lang/objc/objc-dyn-sbtype/TestObjCDynamicSBType.py
index 7962b0fe1d55..fd3ae8455e8f 100644
--- a/lldb/test/lang/objc/objc-dyn-sbtype/TestObjCDynamicSBType.py
+++ b/lldb/test/lang/objc/objc-dyn-sbtype/TestObjCDynamicSBType.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class ObjCDynamicSBTypeTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/objc-dynamic-value/TestObjCDynamicValue.py b/lldb/test/lang/objc/objc-dynamic-value/TestObjCDynamicValue.py
index ae5a06a4b727..61a69cbc9936 100644
--- a/lldb/test/lang/objc/objc-dynamic-value/TestObjCDynamicValue.py
+++ b/lldb/test/lang/objc/objc-dynamic-value/TestObjCDynamicValue.py
@@ -12,7 +12,7 @@ class ObjCDynamicValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     @expectedFailureDarwin("llvm.org/pr20271 rdar://18684107")
@@ -24,7 +24,7 @@ class ObjCDynamicValueTestCase(TestBase):
         self.buildDsym()
         self.do_get_dynamic_vals()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     @expectedFailureDarwin("llvm.org/pr20271 rdar://18684107")
diff --git a/lldb/test/lang/objc/objc-ivar-offsets/TestObjCIvarOffsets.py b/lldb/test/lang/objc/objc-ivar-offsets/TestObjCIvarOffsets.py
index 601dddea35d3..d03176bfc6a3 100644
--- a/lldb/test/lang/objc/objc-ivar-offsets/TestObjCIvarOffsets.py
+++ b/lldb/test/lang/objc/objc-ivar-offsets/TestObjCIvarOffsets.py
@@ -10,7 +10,7 @@ class TestObjCIvarOffsets(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -18,7 +18,7 @@ class TestObjCIvarOffsets(TestBase):
         self.buildDsym()
         self.objc_ivar_offsets()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf_and_python_api(self):
diff --git a/lldb/test/lang/objc/objc-ivar-stripped/TestObjCIvarStripped.py b/lldb/test/lang/objc/objc-ivar-stripped/TestObjCIvarStripped.py
index 948bb378a635..56d9eb97d720 100644
--- a/lldb/test/lang/objc/objc-ivar-stripped/TestObjCIvarStripped.py
+++ b/lldb/test/lang/objc/objc-ivar-stripped/TestObjCIvarStripped.py
@@ -10,7 +10,7 @@ class TestObjCIvarStripped(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
diff --git a/lldb/test/lang/objc/objc-new-syntax/TestObjCNewSyntax.py b/lldb/test/lang/objc/objc-new-syntax/TestObjCNewSyntax.py
index 06d6a15f714f..38797904283a 100644
--- a/lldb/test/lang/objc/objc-new-syntax/TestObjCNewSyntax.py
+++ b/lldb/test/lang/objc/objc-new-syntax/TestObjCNewSyntax.py
@@ -14,7 +14,7 @@ class ObjCNewSyntaxTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_expr_with_dsym(self):
         self.buildDsym()
diff --git a/lldb/test/lang/objc/objc-optimized/TestObjcOptimized.py b/lldb/test/lang/objc/objc-optimized/TestObjcOptimized.py
index 55127c392fd7..507e29e67735 100644
--- a/lldb/test/lang/objc/objc-optimized/TestObjcOptimized.py
+++ b/lldb/test/lang/objc/objc-optimized/TestObjcOptimized.py
@@ -16,7 +16,7 @@ import re
 
 # rdar://problem/9087739
 # test failure: objc_optimized does not work for "-C clang -A i386"
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class ObjcOptimizedTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/objc-property/TestObjCProperty.py b/lldb/test/lang/objc/objc-property/TestObjCProperty.py
index 636d7d7f709d..842ada1c2d7f 100644
--- a/lldb/test/lang/objc/objc-property/TestObjCProperty.py
+++ b/lldb/test/lang/objc/objc-property/TestObjCProperty.py
@@ -12,7 +12,7 @@ class ObjCPropertyTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_objc_properties_with_dsym(self):
@@ -22,7 +22,7 @@ class ObjCPropertyTestCase(TestBase):
         self.buildDsym()
         self.do_test_properties()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_objc_properties_with_dwarf(self):
diff --git a/lldb/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py b/lldb/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py
index 5416476031ad..894fa2278e13 100644
--- a/lldb/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py
+++ b/lldb/test/lang/objc/objc-static-method-stripped/TestObjCStaticMethodStripped.py
@@ -10,7 +10,7 @@ class TestObjCStaticMethodStripped(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     #<rdar://problem/12042992>
     @dsym_test
diff --git a/lldb/test/lang/objc/objc-static-method/TestObjCStaticMethod.py b/lldb/test/lang/objc/objc-static-method/TestObjCStaticMethod.py
index dc78b888a511..84f5210336f7 100644
--- a/lldb/test/lang/objc/objc-static-method/TestObjCStaticMethod.py
+++ b/lldb/test/lang/objc/objc-static-method/TestObjCStaticMethod.py
@@ -10,7 +10,7 @@ class TestObjCStaticMethod(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     #<rdar://problem/9745789> "expression" can't call functions in class methods
     @dsym_test
@@ -19,7 +19,7 @@ class TestObjCStaticMethod(TestBase):
         self.buildDsym()
         self.objc_static_method()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     #<rdar://problem/9745789> "expression" can't call functions in class methods
     @dwarf_test
diff --git a/lldb/test/lang/objc/objc-stepping/TestObjCStepping.py b/lldb/test/lang/objc/objc-stepping/TestObjCStepping.py
index 92aa3ec56295..d93bae682f20 100644
--- a/lldb/test/lang/objc/objc-stepping/TestObjCStepping.py
+++ b/lldb/test/lang/objc/objc-stepping/TestObjCStepping.py
@@ -13,7 +13,7 @@ class TestObjCStepping(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -21,7 +21,7 @@ class TestObjCStepping(TestBase):
         self.buildDsym()
         self.objc_stepping()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf_and_python_api(self):
diff --git a/lldb/test/lang/objc/objc-struct-return/TestObjCStructReturn.py b/lldb/test/lang/objc/objc-struct-return/TestObjCStructReturn.py
index 8ea9c1afe46f..c884fe9486b3 100644
--- a/lldb/test/lang/objc/objc-struct-return/TestObjCStructReturn.py
+++ b/lldb/test/lang/objc/objc-struct-return/TestObjCStructReturn.py
@@ -10,7 +10,7 @@ class TestObjCClassMethod(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -18,7 +18,7 @@ class TestObjCClassMethod(TestBase):
         self.buildDsym()
         self.objc_class_method()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf_and_python_api(self):
diff --git a/lldb/test/lang/objc/objc-super/TestObjCSuper.py b/lldb/test/lang/objc/objc-super/TestObjCSuper.py
index a9db9b5b9116..faa97c200b1c 100644
--- a/lldb/test/lang/objc/objc-super/TestObjCSuper.py
+++ b/lldb/test/lang/objc/objc-super/TestObjCSuper.py
@@ -10,7 +10,7 @@ class TestObjCSuperMethod(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailurei386
     @python_api_test
     @dsym_test
@@ -19,7 +19,7 @@ class TestObjCSuperMethod(TestBase):
         self.buildDsym()
         self.objc_super()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @expectedFailurei386
     @python_api_test
     @dwarf_test
diff --git a/lldb/test/lang/objc/print-obj/TestPrintObj.py b/lldb/test/lang/objc/print-obj/TestPrintObj.py
index 88d8188cf21c..c3386bf930d7 100644
--- a/lldb/test/lang/objc/print-obj/TestPrintObj.py
+++ b/lldb/test/lang/objc/print-obj/TestPrintObj.py
@@ -7,7 +7,7 @@ import unittest2
 import lldb
 from lldbtest import *
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class PrintObjTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/radar-9691614/TestObjCMethodReturningBOOL.py b/lldb/test/lang/objc/radar-9691614/TestObjCMethodReturningBOOL.py
index 20aecdec3c8f..ff860e1ef3e8 100644
--- a/lldb/test/lang/objc/radar-9691614/TestObjCMethodReturningBOOL.py
+++ b/lldb/test/lang/objc/radar-9691614/TestObjCMethodReturningBOOL.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class MethodReturningBOOLTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/rdar-10967107/TestRdar10967107.py b/lldb/test/lang/objc/rdar-10967107/TestRdar10967107.py
index ecc80ebc4029..c8f4c1fd2cae 100644
--- a/lldb/test/lang/objc/rdar-10967107/TestRdar10967107.py
+++ b/lldb/test/lang/objc/rdar-10967107/TestRdar10967107.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class Rdar10967107TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/rdar-11355592/TestRdar11355592.py b/lldb/test/lang/objc/rdar-11355592/TestRdar11355592.py
index 165948d16e0e..0cbb7388711e 100644
--- a/lldb/test/lang/objc/rdar-11355592/TestRdar11355592.py
+++ b/lldb/test/lang/objc/rdar-11355592/TestRdar11355592.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class Rdar10967107TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/rdar-12408181/TestRdar12408181.py b/lldb/test/lang/objc/rdar-12408181/TestRdar12408181.py
index caae8963ee73..ddc94efca533 100644
--- a/lldb/test/lang/objc/rdar-12408181/TestRdar12408181.py
+++ b/lldb/test/lang/objc/rdar-12408181/TestRdar12408181.py
@@ -8,7 +8,7 @@ import lldb
 from lldbtest import *
 import lldbutil
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class Rdar12408181TestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/lang/objc/real-definition/TestRealDefinition.py b/lldb/test/lang/objc/real-definition/TestRealDefinition.py
index dd476fc37d38..41f0b27db1d5 100644
--- a/lldb/test/lang/objc/real-definition/TestRealDefinition.py
+++ b/lldb/test/lang/objc/real-definition/TestRealDefinition.py
@@ -10,7 +10,7 @@ class TestRealDefinition(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_frame_var_after_stop_at_interface_with_dsym(self):
         """Test that we can find the implementation for an objective C type"""
@@ -19,7 +19,7 @@ class TestRealDefinition(TestBase):
         self.buildDsym()
         self.stop_at_interface()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_frame_var_after_stop_at_interface_with_dwarf(self):
         """Test that we can find the implementation for an objective C type"""
@@ -28,7 +28,7 @@ class TestRealDefinition(TestBase):
         self.buildDwarf()
         self.stop_at_interface()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_frame_var_after_stop_at_implementation_with_dsym(self):
         """Test that we can find the implementation for an objective C type"""
@@ -37,7 +37,7 @@ class TestRealDefinition(TestBase):
         self.buildDsym()
         self.stop_at_implementation()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_frame_var_after_stop_at_implementation_with_dwarf(self):
         """Test that we can find the implementation for an objective C type"""
diff --git a/lldb/test/lang/objc/self/TestObjCSelf.py b/lldb/test/lang/objc/self/TestObjCSelf.py
index cc58bf2185f5..1ed2283292ee 100644
--- a/lldb/test/lang/objc/self/TestObjCSelf.py
+++ b/lldb/test/lang/objc/self/TestObjCSelf.py
@@ -9,14 +9,14 @@ class ObjCSelfTestCase(TestBase):
     
     mydir = TestBase.compute_mydir(__file__)
     
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that the appropriate member variables are available when stopped in Objective-C class and instance methods"""
         self.buildDsym()
         self.self_commands()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf_and_run_command(self):
         """Test that the appropriate member variables are available when stopped in Objective-C class and instance methods"""
diff --git a/lldb/test/linux/builtin_trap/TestBuiltinTrap.py b/lldb/test/linux/builtin_trap/TestBuiltinTrap.py
index 85c934d6f119..426833939076 100644
--- a/lldb/test/linux/builtin_trap/TestBuiltinTrap.py
+++ b/lldb/test/linux/builtin_trap/TestBuiltinTrap.py
@@ -13,7 +13,7 @@ class BuiltinTrapTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Test that LLDB handles a function with __builtin_trap correctly."""
diff --git a/lldb/test/lldbinline.py b/lldb/test/lldbinline.py
index 9e982e4ad1fb..20eb5a0d00a4 100644
--- a/lldb/test/lldbinline.py
+++ b/lldb/test/lldbinline.py
@@ -114,7 +114,7 @@ class InlineTest(TestBase):
         makefile.close()
 
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def __test_with_dsym(self):
         self.using_dsym = True
         self.BuildMakefile()
diff --git a/lldb/test/lldbtest.py b/lldb/test/lldbtest.py
index f1d12f157f63..a39be843cb92 100644
--- a/lldb/test/lldbtest.py
+++ b/lldb/test/lldbtest.py
@@ -587,7 +587,7 @@ def expectedFailurex86_64(bugnumber=None):
 
 def expectedFailureOS(oslist, bugnumber=None, compilers=None):
     def fn(self):
-        return (lldb.DBG.GetSelectedPlatform().GetTriple().split('-')[2] in oslist and
+        return (self.getPlatform() in oslist and
                 self.expectedCompiler(compilers))
     return expectedFailure(fn, bugnumber)
 
@@ -641,36 +641,6 @@ def skipIfRemoteDueToDeadlock(func):
             func(*args, **kwargs)
     return wrapper
 
-def skipIfFreeBSD(func):
-    """Decorate the item to skip tests that should be skipped on FreeBSD."""
-    if isinstance(func, type) and issubclass(func, unittest2.TestCase):
-        raise Exception("@skipIfFreeBSD can only be used to decorate a test method")
-    @wraps(func)
-    def wrapper(*args, **kwargs):
-        from unittest2 import case
-        self = args[0]
-        platform = lldb.DBG.GetSelectedPlatform().GetTriple().split('-')[2]
-        if "freebsd" in platform:
-            self.skipTest("skip on FreeBSD")
-        else:
-            func(*args, **kwargs)
-    return wrapper
-
-def skipIfLinux(func):
-    """Decorate the item to skip tests that should be skipped on Linux."""
-    if isinstance(func, type) and issubclass(func, unittest2.TestCase):
-        raise Exception("@skipIfLinux can only be used to decorate a test method")
-    @wraps(func)
-    def wrapper(*args, **kwargs):
-        from unittest2 import case
-        self = args[0]
-        platform = lldb.DBG.GetSelectedPlatform().GetTriple().split('-')[2]
-        if "linux" in platform:
-            self.skipTest("skip on linux")
-        else:
-            func(*args, **kwargs)
-    return wrapper
-
 def skipIfNoSBHeaders(func):
     """Decorate the item to mark tests that should be skipped when LLDB is built with no SB API headers."""
     if isinstance(func, type) and issubclass(func, unittest2.TestCase):
@@ -690,36 +660,53 @@ def skipIfNoSBHeaders(func):
             func(*args, **kwargs)
     return wrapper
 
-def skipIfWindows(func):
-    """Decorate the item to skip tests that should be skipped on Windows."""
-    if isinstance(func, type) and issubclass(func, unittest2.TestCase):
-        raise Exception("@skipIfWindows can only be used to decorate a test method")
-    @wraps(func)
-    def wrapper(*args, **kwargs):
-        from unittest2 import case
-        self = args[0]
-        platform = lldb.DBG.GetSelectedPlatform().GetTriple().split('-')[2]
-        if "windows" in platform:
-            self.skipTest("skip on Windows")
-        else:
-            func(*args, **kwargs)
-    return wrapper
+def skipIfFreeBSD(func):
+    """Decorate the item to skip tests that should be skipped on FreeBSD."""
+    return skipIfPlatform(["freebsd"])(func)
 
 def skipIfDarwin(func):
     """Decorate the item to skip tests that should be skipped on Darwin."""
-    if isinstance(func, type) and issubclass(func, unittest2.TestCase):
-        raise Exception("@skipIfDarwin can only be used to decorate a test method")
-    @wraps(func)
-    def wrapper(*args, **kwargs):
-        from unittest2 import case
-        self = args[0]
-        platform = lldb.DBG.GetSelectedPlatform().GetTriple().split('-')[2]
-        if "darwin" in platform or "macosx" in platform:
-            self.skipTest("skip on darwin")
-        else:
-            func(*args, **kwargs)
-    return wrapper
+    return skipIfPlatform(["darwin", "macosx"])(func)
 
+def skipIfLinux(func):
+    """Decorate the item to skip tests that should be skipped on Linux."""
+    return skipIfPlatform(["linux"])(func)
+
+def skipIfWindows(func):
+    """Decorate the item to skip tests that should be skipped on Windows."""
+    return skipIfPlatform(["windows"])(func)
+
+def skipUnlessDarwin(func):
+    """Decorate the item to skip tests that should be skipped on any non Darwin platform."""
+    return skipUnlessPlatform(["darwin", "macosx"])(func)
+
+def skipIfPlatform(oslist):
+    """Decorate the item to skip tests if running on one of the listed platforms."""
+    def decorator(func):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            from unittest2 import case
+            self = args[0]
+            if self.getPlatform() in oslist:
+                self.skipTest("skip on %s" % (", ".join(oslist)))
+            else:
+                func(*args, **kwargs)
+        return wrapper
+    return decorator
+
+def skipUnlessPlatform(oslist):
+    """Decorate the item to skip tests unless running on one of the listed platforms."""
+    def decorator(func):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            from unittest2 import case
+            self = args[0]
+            if not (self.getPlatform() in oslist):
+                self.skipTest("requires one of %s" % (", ".join(oslist)))
+            else:
+                func(*args, **kwargs)
+        return wrapper
+    return decorator
 
 def skipIfLinuxClang(func):
     """Decorate the item to skip tests that should be skipped if building on 
@@ -1400,6 +1387,10 @@ class Base(unittest2.TestCase):
                 version = m.group(1)
         return version
 
+    def getPlatform(self):
+        """Returns the platform the test suite is running on."""
+        return lldb.DBG.GetSelectedPlatform().GetTriple().split('-')[2]
+
     def isIntelCompiler(self):
         """ Returns true if using an Intel (ICC) compiler, false otherwise. """
         return any([x in self.getCompiler() for x in ["icc", "icpc", "icl"]])
diff --git a/lldb/test/logging/TestLogging.py b/lldb/test/logging/TestLogging.py
index aea077d0b9d5..f8e995cd5705 100644
--- a/lldb/test/logging/TestLogging.py
+++ b/lldb/test/logging/TestLogging.py
@@ -20,7 +20,7 @@ class LogTestCase(TestBase):
         cls.RemoveTempFile(cls.truncate_log_file)
         cls.RemoveTempFile(cls.append_log_file)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym (self):
         self.buildDsym ()
diff --git a/lldb/test/macosx/add-dsym/TestAddDsymMidExecutionCommand.py b/lldb/test/macosx/add-dsym/TestAddDsymMidExecutionCommand.py
index 22108f51fca5..29ab55e6199d 100644
--- a/lldb/test/macosx/add-dsym/TestAddDsymMidExecutionCommand.py
+++ b/lldb/test/macosx/add-dsym/TestAddDsymMidExecutionCommand.py
@@ -6,7 +6,7 @@ import lldb
 import sys
 from lldbtest import *
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class AddDsymMidExecutionCommandCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
diff --git a/lldb/test/macosx/debug-info/apple_types/TestAppleTypesIsProduced.py b/lldb/test/macosx/debug-info/apple_types/TestAppleTypesIsProduced.py
index 34556a774049..f2a21c6311ff 100644
--- a/lldb/test/macosx/debug-info/apple_types/TestAppleTypesIsProduced.py
+++ b/lldb/test/macosx/debug-info/apple_types/TestAppleTypesIsProduced.py
@@ -13,7 +13,7 @@ class AppleTypesTestCase(TestBase):
     mydir = TestBase.compute_mydir(__file__)
 
     #rdar://problem/11166975
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_debug_info_for_apple_types(self):
         """Test that __apple_types section does get produced by clang."""
 
@@ -23,7 +23,7 @@ class AppleTypesTestCase(TestBase):
         self.buildDefault()
         self.apple_types(dot_o=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_debug_info_for_apple_types_dsym(self):
         """Test that __apple_types section does get produced by dsymutil.
            This is supposed to succeed even with rdar://problem/11166975."""
diff --git a/lldb/test/macosx/indirect_symbol/TestIndirectSymbols.py b/lldb/test/macosx/indirect_symbol/TestIndirectSymbols.py
index b272e6c12402..e92b3c43f0bd 100644
--- a/lldb/test/macosx/indirect_symbol/TestIndirectSymbols.py
+++ b/lldb/test/macosx/indirect_symbol/TestIndirectSymbols.py
@@ -10,7 +10,7 @@ class TestIndirectFunctions(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -18,7 +18,7 @@ class TestIndirectFunctions(TestBase):
         self.buildDsym()
         self.indirect_stepping()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf_and_python_api(self):
diff --git a/lldb/test/macosx/order/TestOrderFile.py b/lldb/test/macosx/order/TestOrderFile.py
index 5ee92421b936..1e25e03c16a5 100644
--- a/lldb/test/macosx/order/TestOrderFile.py
+++ b/lldb/test/macosx/order/TestOrderFile.py
@@ -12,14 +12,14 @@ class OrderFileTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym(self):
         """Test debug symbols follow the correct order by the order file."""
         self.buildDsym()
         self.order_file()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dwarf_test
     def test_with_dwarf(self):
         """Test debug symbols follow the correct order by the order file."""
diff --git a/lldb/test/macosx/queues/TestQueues.py b/lldb/test/macosx/queues/TestQueues.py
index dcd880772177..c6c7db6bc1c3 100644
--- a/lldb/test/macosx/queues/TestQueues.py
+++ b/lldb/test/macosx/queues/TestQueues.py
@@ -10,7 +10,7 @@ class TestQueues(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -19,7 +19,7 @@ class TestQueues(TestBase):
         self.queues()
         self.queues_with_libBacktraceRecording()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf_and_python_api(self):
diff --git a/lldb/test/macosx/safe-to-func-call/TestSafeFuncCalls.py b/lldb/test/macosx/safe-to-func-call/TestSafeFuncCalls.py
index be303d8697d7..73ae892dc757 100644
--- a/lldb/test/macosx/safe-to-func-call/TestSafeFuncCalls.py
+++ b/lldb/test/macosx/safe-to-func-call/TestSafeFuncCalls.py
@@ -10,7 +10,7 @@ class TestSafeFuncCalls(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_python_api(self):
@@ -18,7 +18,7 @@ class TestSafeFuncCalls(TestBase):
         self.buildDsym()
         self.function_call_safety_check()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf_and_python_api(self):
diff --git a/lldb/test/macosx/universal/TestUniversal.py b/lldb/test/macosx/universal/TestUniversal.py
index 1a83104ec059..342c1a9f8332 100644
--- a/lldb/test/macosx/universal/TestUniversal.py
+++ b/lldb/test/macosx/universal/TestUniversal.py
@@ -17,8 +17,8 @@ class UniversalTestCase(TestBase):
         self.line = line_number('main.c', '// Set break point at this line.')
 
     @python_api_test
-    @unittest2.skipUnless(sys.platform.startswith("darwin") and os.uname()[4] in ['i386', 'x86_64'],
-                          "requires Darwin & i386")
+    @skipUnlessDarwin
+    @unittest2.skipUnless(os.uname()[4] in ['i386', 'x86_64'], "requires i386 or x86_64")
     def test_sbdebugger_create_target_with_file_and_target_triple(self):
         """Test the SBDebugger.CreateTargetWithFileAndTargetTriple() API."""
         # Invoke the default build rule.
@@ -35,8 +35,8 @@ class UniversalTestCase(TestBase):
         process = target.LaunchSimple (None, None, self.get_process_working_directory())
         self.assertTrue(process, PROCESS_IS_VALID)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin") and os.uname()[4] in ['i386', 'x86_64'],
-                          "requires Darwin & i386")
+    @skipUnlessDarwin
+    @unittest2.skipUnless(os.uname()[4] in ['i386', 'x86_64'], "requires i386 or x86_64")
     def test_process_launch_for_universal(self):
         """Test process launch of a universal binary."""
         from lldbutil import print_registers
diff --git a/lldb/test/python_api/breakpoint/TestBreakpointAPI.py b/lldb/test/python_api/breakpoint/TestBreakpointAPI.py
index ed3402d3d2ec..0a4e7fa5a791 100644
--- a/lldb/test/python_api/breakpoint/TestBreakpointAPI.py
+++ b/lldb/test/python_api/breakpoint/TestBreakpointAPI.py
@@ -12,7 +12,7 @@ class BreakpointAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_breakpoint_is_valid_with_dsym(self):
diff --git a/lldb/test/python_api/class_members/TestSBTypeClassMembers.py b/lldb/test/python_api/class_members/TestSBTypeClassMembers.py
index 554cc3150a87..c3af671572ac 100644
--- a/lldb/test/python_api/class_members/TestSBTypeClassMembers.py
+++ b/lldb/test/python_api/class_members/TestSBTypeClassMembers.py
@@ -12,7 +12,7 @@ class SBTypeMemberFunctionsTest(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
@@ -22,7 +22,7 @@ class SBTypeMemberFunctionsTest(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.type_api(self.exe_name)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf(self):
diff --git a/lldb/test/python_api/event/TestEvents.py b/lldb/test/python_api/event/TestEvents.py
index 62c1f503dfc2..d79ba333bb5d 100644
--- a/lldb/test/python_api/event/TestEvents.py
+++ b/lldb/test/python_api/event/TestEvents.py
@@ -12,7 +12,7 @@ class EventAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_listen_for_and_print_event_with_dsym(self):
@@ -20,9 +20,7 @@ class EventAPITestCase(TestBase):
         self.buildDsym()
         self.do_listen_for_and_print_event()
 
-    @unittest2.skipUnless((sys.platform.startswith("darwin") or
-                           sys.platform.startswith("freebsd")),
-                          "requires Darwin or FreeBSD")
+    @skipUnlessPlatform(["darwin", "macosx", "freebsd"])
     @python_api_test
     @dwarf_test
     def test_listen_for_and_print_event_with_dwarf(self):
@@ -30,7 +28,7 @@ class EventAPITestCase(TestBase):
         self.buildDwarf()
         self.do_listen_for_and_print_event()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_wait_for_event_with_dsym(self):
@@ -46,7 +44,7 @@ class EventAPITestCase(TestBase):
         self.buildDwarf()
         self.do_wait_for_event()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_add_listener_to_broadcaster_with_dsym(self):
diff --git a/lldb/test/python_api/findvalue_duplist/TestSBFrameFindValue.py b/lldb/test/python_api/findvalue_duplist/TestSBFrameFindValue.py
index 6a3b2b0b43f6..41d782ea93a2 100644
--- a/lldb/test/python_api/findvalue_duplist/TestSBFrameFindValue.py
+++ b/lldb/test/python_api/findvalue_duplist/TestSBFrameFindValue.py
@@ -10,7 +10,7 @@ class SBFrameFindValueTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_formatters_api(self):
diff --git a/lldb/test/python_api/formatters/TestFormattersSBAPI.py b/lldb/test/python_api/formatters/TestFormattersSBAPI.py
index 67aa639fd7b8..c8604735f628 100644
--- a/lldb/test/python_api/formatters/TestFormattersSBAPI.py
+++ b/lldb/test/python_api/formatters/TestFormattersSBAPI.py
@@ -10,7 +10,7 @@ class SBFormattersAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_formatters_api(self):
diff --git a/lldb/test/python_api/frame/TestFrames.py b/lldb/test/python_api/frame/TestFrames.py
index c820e1b90c9b..068aa4c59092 100644
--- a/lldb/test/python_api/frame/TestFrames.py
+++ b/lldb/test/python_api/frame/TestFrames.py
@@ -13,7 +13,7 @@ class FrameAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_arg_vals_for_call_stack_with_dsym(self):
diff --git a/lldb/test/python_api/frame/inlines/TestInlinedFrame.py b/lldb/test/python_api/frame/inlines/TestInlinedFrame.py
index 25e9b350e271..217b87e89269 100644
--- a/lldb/test/python_api/frame/inlines/TestInlinedFrame.py
+++ b/lldb/test/python_api/frame/inlines/TestInlinedFrame.py
@@ -12,7 +12,7 @@ class InlinedFrameAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_stop_at_outer_inline_with_dsym(self):
diff --git a/lldb/test/python_api/function_symbol/TestDisasmAPI.py b/lldb/test/python_api/function_symbol/TestDisasmAPI.py
index 6ec69ab6e70b..d7270ba72d50 100644
--- a/lldb/test/python_api/function_symbol/TestDisasmAPI.py
+++ b/lldb/test/python_api/function_symbol/TestDisasmAPI.py
@@ -12,7 +12,7 @@ class DisasmAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/function_symbol/TestSymbolAPI.py b/lldb/test/python_api/function_symbol/TestSymbolAPI.py
index dfb8fad23cbc..6a315f288a65 100644
--- a/lldb/test/python_api/function_symbol/TestSymbolAPI.py
+++ b/lldb/test/python_api/function_symbol/TestSymbolAPI.py
@@ -12,7 +12,7 @@ class SymbolAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/hello_world/TestHelloWorld.py b/lldb/test/python_api/hello_world/TestHelloWorld.py
index cf24889260da..a94ceee486d9 100644
--- a/lldb/test/python_api/hello_world/TestHelloWorld.py
+++ b/lldb/test/python_api/hello_world/TestHelloWorld.py
@@ -10,7 +10,7 @@ class HelloWorldTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_process_launch_api(self):
@@ -34,7 +34,7 @@ class HelloWorldTestCase(TestBase):
         self.hello_world_python()
 
     @not_remote_testsuite_ready
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_attach_to_process_with_id_api(self):
@@ -59,7 +59,7 @@ class HelloWorldTestCase(TestBase):
         self.hello_world_attach_with_id_api()
 
     @not_remote_testsuite_ready
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_attach_to_process_with_name_api(self):
diff --git a/lldb/test/python_api/interpreter/TestCommandInterpreterAPI.py b/lldb/test/python_api/interpreter/TestCommandInterpreterAPI.py
index 2eeb34f5ced8..c57535c77c0f 100644
--- a/lldb/test/python_api/interpreter/TestCommandInterpreterAPI.py
+++ b/lldb/test/python_api/interpreter/TestCommandInterpreterAPI.py
@@ -9,7 +9,7 @@ class CommandInterpreterAPICase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_process_launch_api(self):
diff --git a/lldb/test/python_api/objc_type/TestObjCType.py b/lldb/test/python_api/objc_type/TestObjCType.py
index ff26ae86e64d..ba3687a6508d 100644
--- a/lldb/test/python_api/objc_type/TestObjCType.py
+++ b/lldb/test/python_api/objc_type/TestObjCType.py
@@ -12,7 +12,7 @@ class ObjCSBTypeTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
@@ -20,7 +20,7 @@ class ObjCSBTypeTestCase(TestBase):
         self.buildDsym()
         self.objc_sbtype_test()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dwarf_test
     def test_with_dwarf(self):
diff --git a/lldb/test/python_api/process/TestProcessAPI.py b/lldb/test/python_api/process/TestProcessAPI.py
index 6ce4d0b7852c..6bc255abfa6d 100644
--- a/lldb/test/python_api/process/TestProcessAPI.py
+++ b/lldb/test/python_api/process/TestProcessAPI.py
@@ -12,7 +12,7 @@ class ProcessAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_read_memory_with_dsym(self):
@@ -27,7 +27,7 @@ class ProcessAPITestCase(TestBase):
         self.buildDwarf()
         self.read_memory()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_write_memory_with_dsym(self):
@@ -42,7 +42,7 @@ class ProcessAPITestCase(TestBase):
         self.buildDwarf()
         self.write_memory()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_access_my_int_with_dsym(self):
diff --git a/lldb/test/python_api/process/io/TestProcessIO.py b/lldb/test/python_api/process/io/TestProcessIO.py
index 8181a94cfc22..66ac0bdb0d86 100644
--- a/lldb/test/python_api/process/io/TestProcessIO.py
+++ b/lldb/test/python_api/process/io/TestProcessIO.py
@@ -10,7 +10,7 @@ class ProcessIOTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "dsym requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_stdin_by_api_with_dsym(self):
@@ -18,7 +18,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDsym()
         self.do_stdin_by_api()
 
-    @unittest2.skipIf(sys.platform.startswith("win32"), "stdio manipulation unsupported on Windows")
+    @skipIfWindows # stdio manipulation unsupported on Windows
     @python_api_test
     @dwarf_test
     def test_stdin_by_api_with_dwarf(self):
@@ -26,7 +26,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDwarf()
         self.do_stdin_by_api()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "dsym requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_stdin_redirection_with_dsym(self):
@@ -34,7 +34,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDsym()
         self.do_stdin_redirection()
 
-    @unittest2.skipIf(sys.platform.startswith("win32"), "stdio manipulation unsupported on Windows")
+    @skipIfWindows # stdio manipulation unsupported on Windows
     @python_api_test
     @dwarf_test
     def test_stdin_redirection_with_dwarf(self):
@@ -42,7 +42,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDwarf()
         self.do_stdin_redirection()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "dsym requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_stdout_redirection_with_dsym(self):
@@ -50,7 +50,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDsym()
         self.do_stdout_redirection()
 
-    @unittest2.skipIf(sys.platform.startswith("win32"), "stdio manipulation unsupported on Windows")
+    @skipIfWindows # stdio manipulation unsupported on Windows
     @python_api_test
     @dwarf_test
     def test_stdout_redirection_with_dwarf(self):
@@ -58,7 +58,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDwarf()
         self.do_stdout_redirection()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "dsym requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_stderr_redirection_with_dsym(self):
@@ -66,7 +66,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDsym()
         self.do_stderr_redirection()
 
-    @unittest2.skipIf(sys.platform.startswith("win32"), "stdio manipulation unsupported on Windows")
+    @skipIfWindows # stdio manipulation unsupported on Windows
     @python_api_test
     @dwarf_test
     def test_stderr_redirection_with_dwarf(self):
@@ -74,7 +74,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDwarf()
         self.do_stderr_redirection()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "dsym requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_stdout_stderr_redirection_with_dsym(self):
@@ -82,7 +82,7 @@ class ProcessIOTestCase(TestBase):
         self.buildDsym()
         self.do_stdout_stderr_redirection()
 
-    @unittest2.skipIf(sys.platform.startswith("win32"), "stdio manipulation unsupported on Windows")
+    @skipIfWindows # stdio manipulation unsupported on Windows
     @python_api_test
     @dwarf_test
     def test_stdout_stderr_redirection_with_dwarf(self):
diff --git a/lldb/test/python_api/rdar-12481949/Test-rdar-12481949.py b/lldb/test/python_api/rdar-12481949/Test-rdar-12481949.py
index 808e64be7f5b..49057851c960 100644
--- a/lldb/test/python_api/rdar-12481949/Test-rdar-12481949.py
+++ b/lldb/test/python_api/rdar-12481949/Test-rdar-12481949.py
@@ -13,7 +13,7 @@ class Radar12481949DataFormatterTestCase(TestBase):
     # test for rdar://problem/12481949
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_with_dsym_and_run_command(self):
         """Check that SBValue.GetValueAsSigned() does the right thing for a 32-bit -1."""
diff --git a/lldb/test/python_api/sbdata/TestSBData.py b/lldb/test/python_api/sbdata/TestSBData.py
index 82a7d05a5f9c..4429da5cdd56 100644
--- a/lldb/test/python_api/sbdata/TestSBData.py
+++ b/lldb/test/python_api/sbdata/TestSBData.py
@@ -11,7 +11,7 @@ class SBDataAPICase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_run_command(self):
diff --git a/lldb/test/python_api/sbvalue_persist/TestSBValuePersist.py b/lldb/test/python_api/sbvalue_persist/TestSBValuePersist.py
index d05274f56b6d..407d417133c0 100644
--- a/lldb/test/python_api/sbvalue_persist/TestSBValuePersist.py
+++ b/lldb/test/python_api/sbvalue_persist/TestSBValuePersist.py
@@ -10,7 +10,7 @@ class SBValuePersistTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/section/TestSectionAPI.py b/lldb/test/python_api/section/TestSectionAPI.py
index de13717f56cc..6c7b4f53ea77 100755
--- a/lldb/test/python_api/section/TestSectionAPI.py
+++ b/lldb/test/python_api/section/TestSectionAPI.py
@@ -9,7 +9,7 @@ class SectionAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_target_byte_size_with_dsym(self):
diff --git a/lldb/test/python_api/symbol-context/TestSymbolContext.py b/lldb/test/python_api/symbol-context/TestSymbolContext.py
index 88fc71546aa3..c7a49bb3eb0a 100644
--- a/lldb/test/python_api/symbol-context/TestSymbolContext.py
+++ b/lldb/test/python_api/symbol-context/TestSymbolContext.py
@@ -12,7 +12,7 @@ class SymbolContextAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/target/TestTargetAPI.py b/lldb/test/python_api/target/TestTargetAPI.py
index 37c019228f16..2494c0f0c236 100644
--- a/lldb/test/python_api/target/TestTargetAPI.py
+++ b/lldb/test/python_api/target/TestTargetAPI.py
@@ -12,7 +12,7 @@ class TargetAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_find_global_variables_with_dsym(self):
@@ -38,7 +38,7 @@ class TargetAPITestCase(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.find_global_variables('b.out')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_find_functions_with_dsym(self):
@@ -57,7 +57,7 @@ class TargetAPITestCase(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.find_functions('b.out')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_description_with_dsym(self):
@@ -72,7 +72,7 @@ class TargetAPITestCase(TestBase):
         self.buildDwarf()
         self.get_description()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     @expectedFailureDarwin("llvm.org/pr20273")
@@ -89,7 +89,7 @@ class TargetAPITestCase(TestBase):
         self.buildDwarf()
         self.launch_new_process_and_redirect_stdout()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_resolve_symbol_context_with_address_with_dsym(self):
@@ -104,7 +104,7 @@ class TargetAPITestCase(TestBase):
         self.buildDwarf()
         self.resolve_symbol_context_with_address()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_platform_with_dsym(self):
@@ -125,7 +125,7 @@ class TargetAPITestCase(TestBase):
         platform = target.platform
         self.assertTrue(platform, VALID_PLATFORM)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_data_byte_size_with_dsym(self):
@@ -144,7 +144,7 @@ class TargetAPITestCase(TestBase):
         target = self.create_simple_target('b.out')
         self.assertEquals(target.data_byte_size, 1)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_code_byte_size_with_dsym(self):
@@ -163,7 +163,7 @@ class TargetAPITestCase(TestBase):
         target = self.create_simple_target('b.out')
         self.assertEquals(target.code_byte_size, 1)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_resolve_file_address_with_dsym(self):
@@ -182,7 +182,7 @@ class TargetAPITestCase(TestBase):
         target = self.create_simple_target('b.out')
         self.resolve_file_address(target)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_read_memory_with_dsym(self):
diff --git a/lldb/test/python_api/thread/TestThreadAPI.py b/lldb/test/python_api/thread/TestThreadAPI.py
index 875273ab3923..cd82faaa3385 100644
--- a/lldb/test/python_api/thread/TestThreadAPI.py
+++ b/lldb/test/python_api/thread/TestThreadAPI.py
@@ -12,7 +12,7 @@ class ThreadAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_process_with_dsym(self):
@@ -27,7 +27,7 @@ class ThreadAPITestCase(TestBase):
         self.buildDwarf()
         self.get_process()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_get_stop_description_with_dsym(self):
@@ -42,7 +42,7 @@ class ThreadAPITestCase(TestBase):
         self.buildDwarf()
         self.get_stop_description()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_run_to_address_with_dsym(self):
@@ -63,7 +63,7 @@ class ThreadAPITestCase(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.run_to_address(self.exe_name)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_out_of_malloc_into_function_b_with_dsym(self):
@@ -86,7 +86,7 @@ class ThreadAPITestCase(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.step_out_of_malloc_into_function_b(self.exe_name)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_step_over_3_times_with_dsym(self):
diff --git a/lldb/test/python_api/type/TestTypeList.py b/lldb/test/python_api/type/TestTypeList.py
index 71d1f4593cad..19f178e0f05c 100644
--- a/lldb/test/python_api/type/TestTypeList.py
+++ b/lldb/test/python_api/type/TestTypeList.py
@@ -12,7 +12,7 @@ class TypeAndTypeListTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/value/TestValueAPI.py b/lldb/test/python_api/value/TestValueAPI.py
index a170692468df..60239762a7f4 100644
--- a/lldb/test/python_api/value/TestValueAPI.py
+++ b/lldb/test/python_api/value/TestValueAPI.py
@@ -12,7 +12,7 @@ class ValueAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/value/change_values/TestChangeValueAPI.py b/lldb/test/python_api/value/change_values/TestChangeValueAPI.py
index 22aa49c0fc7b..5e8e08113d67 100644
--- a/lldb/test/python_api/value/change_values/TestChangeValueAPI.py
+++ b/lldb/test/python_api/value/change_values/TestChangeValueAPI.py
@@ -12,7 +12,7 @@ class ChangeValueAPITestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_change_value_with_dsym(self):
diff --git a/lldb/test/python_api/value/linked_list/TestValueAPILinkedList.py b/lldb/test/python_api/value/linked_list/TestValueAPILinkedList.py
index 68905f3ec4a7..6a1224bc106e 100644
--- a/lldb/test/python_api/value/linked_list/TestValueAPILinkedList.py
+++ b/lldb/test/python_api/value/linked_list/TestValueAPILinkedList.py
@@ -13,7 +13,7 @@ class ValueAsLinkedListTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym(self):
diff --git a/lldb/test/python_api/value_var_update/TestValueVarUpdate.py b/lldb/test/python_api/value_var_update/TestValueVarUpdate.py
index 395982374d24..5fb6893aec75 100644
--- a/lldb/test/python_api/value_var_update/TestValueVarUpdate.py
+++ b/lldb/test/python_api/value_var_update/TestValueVarUpdate.py
@@ -10,7 +10,7 @@ class HelloWorldTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_with_dsym_and_process_launch_api(self):
diff --git a/lldb/test/python_api/watchpoint/TestSetWatchpoint.py b/lldb/test/python_api/watchpoint/TestSetWatchpoint.py
index f4dd7ab780fb..8c567c196a2b 100644
--- a/lldb/test/python_api/watchpoint/TestSetWatchpoint.py
+++ b/lldb/test/python_api/watchpoint/TestSetWatchpoint.py
@@ -20,7 +20,7 @@ class SetWatchpointAPITestCase(TestBase):
         # Find the line number to break inside main().
         self.line = line_number(self.source, '// Set break point at this line.')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_watch_val_with_dsym(self):
diff --git a/lldb/test/python_api/watchpoint/TestWatchpointIgnoreCount.py b/lldb/test/python_api/watchpoint/TestWatchpointIgnoreCount.py
index 512f1c210955..1412b9ed2681 100644
--- a/lldb/test/python_api/watchpoint/TestWatchpointIgnoreCount.py
+++ b/lldb/test/python_api/watchpoint/TestWatchpointIgnoreCount.py
@@ -20,7 +20,7 @@ class WatchpointIgnoreCountTestCase(TestBase):
         # Find the line number to break inside main().
         self.line = line_number(self.source, '// Set break point at this line.')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_set_watch_ignore_count_with_dsym(self):
diff --git a/lldb/test/python_api/watchpoint/TestWatchpointIter.py b/lldb/test/python_api/watchpoint/TestWatchpointIter.py
index 76514ee42777..592c040ea692 100644
--- a/lldb/test/python_api/watchpoint/TestWatchpointIter.py
+++ b/lldb/test/python_api/watchpoint/TestWatchpointIter.py
@@ -20,7 +20,7 @@ class WatchpointIteratorTestCase(TestBase):
         # Find the line number to break inside main().
         self.line = line_number(self.source, '// Set break point at this line.')
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_watch_iter_with_dsym(self):
diff --git a/lldb/test/python_api/watchpoint/condition/TestWatchpointConditionAPI.py b/lldb/test/python_api/watchpoint/condition/TestWatchpointConditionAPI.py
index 3c164c5635f5..ae48e843fd1f 100644
--- a/lldb/test/python_api/watchpoint/condition/TestWatchpointConditionAPI.py
+++ b/lldb/test/python_api/watchpoint/condition/TestWatchpointConditionAPI.py
@@ -25,7 +25,7 @@ class WatchpointConditionAPITestCase(TestBase):
         self.exe_name = self.testMethodName
         self.d = {'CXX_SOURCES': self.source, 'EXE': self.exe_name}
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_watchpoint_cond_api_with_dsym(self):
         """Test watchpoint condition API."""
diff --git a/lldb/test/python_api/watchpoint/watchlocation/TestSetWatchlocation.py b/lldb/test/python_api/watchpoint/watchlocation/TestSetWatchlocation.py
index 98ff4a8535d6..4a02179fd934 100644
--- a/lldb/test/python_api/watchpoint/watchlocation/TestSetWatchlocation.py
+++ b/lldb/test/python_api/watchpoint/watchlocation/TestSetWatchlocation.py
@@ -22,7 +22,7 @@ class SetWatchlocationAPITestCase(TestBase):
         # This is for verifying that watch location works.
         self.violating_func = "do_bad_thing_with_location";
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_watch_location_with_dsym(self):
diff --git a/lldb/test/python_api/watchpoint/watchlocation/TestTargetWatchAddress.py b/lldb/test/python_api/watchpoint/watchlocation/TestTargetWatchAddress.py
index 2b62e0e45628..83ac795d9da4 100644
--- a/lldb/test/python_api/watchpoint/watchlocation/TestTargetWatchAddress.py
+++ b/lldb/test/python_api/watchpoint/watchlocation/TestTargetWatchAddress.py
@@ -22,7 +22,7 @@ class TargetWatchAddressAPITestCase(TestBase):
         # This is for verifying that watch location works.
         self.violating_func = "do_bad_thing_with_location";
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_watch_address_with_dsym(self):
@@ -38,7 +38,7 @@ class TargetWatchAddressAPITestCase(TestBase):
         self.buildDwarf()
         self.do_set_watchaddress()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @python_api_test
     @dsym_test
     def test_watch_address_with_invalid_watch_size_with_dsym(self):
diff --git a/lldb/test/settings/TestSettings.py b/lldb/test/settings/TestSettings.py
index c7cfe6c71376..2cb9afb81bbc 100644
--- a/lldb/test/settings/TestSettings.py
+++ b/lldb/test/settings/TestSettings.py
@@ -199,7 +199,7 @@ class SettingsCommandTestCase(TestBase):
         self.expect("disassemble -n numberfn",
             substrs = ["5ah"])
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_run_args_and_env_vars_with_dsym(self):
         """Test that run-args and env-vars are passed to the launched process."""
diff --git a/lldb/test/tools/lldb-mi/signal/TestMiSignal.py b/lldb/test/tools/lldb-mi/signal/TestMiSignal.py
index ef2c6e32d006..cbdd9602341a 100644
--- a/lldb/test/tools/lldb-mi/signal/TestMiSignal.py
+++ b/lldb/test/tools/lldb-mi/signal/TestMiSignal.py
@@ -80,7 +80,7 @@ class MiSignalTestCase(lldbmi_testcase.MiTestCaseBase):
 
     @lldbmi_test
     @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_lldbmi_stopped_when_stopatentry_remote(self):
         """Test that 'lldb-mi --interpreter' notifies after it was stopped on entry (remote)."""
 
@@ -156,7 +156,7 @@ class MiSignalTestCase(lldbmi_testcase.MiTestCaseBase):
 
     @lldbmi_test
     @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_lldbmi_stopped_when_segfault_remote(self):
         """Test that 'lldb-mi --interpreter' notifies after it was stopped when segfault occurred (remote)."""
 
diff --git a/lldb/test/tools/lldb-mi/stack/TestMiStack.py b/lldb/test/tools/lldb-mi/stack/TestMiStack.py
index 714709c37ae8..f4a5b131fe02 100644
--- a/lldb/test/tools/lldb-mi/stack/TestMiStack.py
+++ b/lldb/test/tools/lldb-mi/stack/TestMiStack.py
@@ -238,7 +238,7 @@ class MiStackTestCase(lldbmi_testcase.MiTestCaseBase):
     @lldbmi_test
     @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
     @skipIfFreeBSD # llvm.org/pr22411: Failure presumably due to known thread races
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_lldbmi_stack_info_frame(self):
         """Test that 'lldb-mi --interpreter' can show information about current frame."""
 
diff --git a/lldb/test/tools/lldb-server/TestGdbRemoteProcessInfo.py b/lldb/test/tools/lldb-server/TestGdbRemoteProcessInfo.py
index 17209e2092ad..8c481a4feb17 100644
--- a/lldb/test/tools/lldb-server/TestGdbRemoteProcessInfo.py
+++ b/lldb/test/tools/lldb-server/TestGdbRemoteProcessInfo.py
@@ -148,7 +148,7 @@ class TestGdbRemoteProcessInfo(gdbremote_testcase.GdbRemoteTestCaseBase):
 
         self.assertEquals(unexpected_key_set, set(), "the listed keys were present but unexpected in qProcessInfo result")
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @debugserver_test
     @dsym_test
     def test_qProcessInfo_contains_cputype_cpusubtype_debugserver_darwin(self):
@@ -156,7 +156,7 @@ class TestGdbRemoteProcessInfo(gdbremote_testcase.GdbRemoteTestCaseBase):
         self.buildDsym()
         self.qProcessInfo_contains_keys(set(['cputype', 'cpusubtype']))
 
-    @unittest2.skipUnless(sys.platform.startswith("linux"), "requires Linux")
+    @skipUnlessPlatform(["linux"])
     @llgs_test
     @dwarf_test
     def test_qProcessInfo_contains_triple_llgs_linux(self):
@@ -164,7 +164,7 @@ class TestGdbRemoteProcessInfo(gdbremote_testcase.GdbRemoteTestCaseBase):
         self.buildDwarf()
         self.qProcessInfo_contains_keys(set(['triple']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @debugserver_test
     @dsym_test
     def test_qProcessInfo_does_not_contain_triple_debugserver_darwin(self):
@@ -175,7 +175,7 @@ class TestGdbRemoteProcessInfo(gdbremote_testcase.GdbRemoteTestCaseBase):
         # for the remote Host and Process.
         self.qProcessInfo_does_not_contain_keys(set(['triple']))
 
-    @unittest2.skipUnless(sys.platform.startswith("linux"), "requires Linux")
+    @skipUnlessPlatform(["linux"])
     @llgs_test
     @dwarf_test
     def test_qProcessInfo_does_not_contain_cputype_cpusubtype_llgs_linux(self):
diff --git a/lldb/test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py b/lldb/test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py
index 182750304445..c8ecb174f027 100644
--- a/lldb/test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py
+++ b/lldb/test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py
@@ -141,7 +141,7 @@ class TestGdbRemote_qThreadStopInfo(gdbremote_testcase.GdbRemoteTestCaseBase):
         self.set_inferior_startup_launch()
         self.qThreadStopInfo_has_valid_thread_names(self.THREAD_COUNT, "a.out")
 
-    @unittest2.skipUnless(sys.platform.startswith("linux"), "test requires OS with set, equal thread names by default")
+    @skipUnlessPlatform(["linux"]) # test requires OS with set, equal thread names by default.
     @llgs_test
     @dwarf_test
     def test_qThreadStopInfo_has_valid_thread_names_llgs_dwarf(self):
diff --git a/lldb/test/types/HideTestFailures.py b/lldb/test/types/HideTestFailures.py
index f7b0dd59e5cf..63facdfcc2d7 100644
--- a/lldb/test/types/HideTestFailures.py
+++ b/lldb/test/types/HideTestFailures.py
@@ -39,7 +39,7 @@ class DebugIntegerTypesFailures(TestBase):
         # Call super's tearDown().
         TestBase.tearDown(self)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_char_type_with_dsym(self):
         """Test that char-type variables are displayed correctly."""
         d = {'CXX_SOURCES': 'char.cpp'}
@@ -54,7 +54,7 @@ class DebugIntegerTypesFailures(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.char_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_short_type_with_dsym(self):
         """Test that short-type variables are displayed correctly."""
         d = {'CXX_SOURCES': 'short.cpp'}
@@ -69,7 +69,7 @@ class DebugIntegerTypesFailures(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.short_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_int_type_with_dsym(self):
         """Test that int-type variables are displayed correctly."""
         d = {'CXX_SOURCES': 'int.cpp'}
@@ -84,7 +84,7 @@ class DebugIntegerTypesFailures(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.int_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_long_type_with_dsym(self):
         """Test that long-type variables are displayed correctly."""
         d = {'CXX_SOURCES': 'long.cpp'}
@@ -100,7 +100,7 @@ class DebugIntegerTypesFailures(TestBase):
         self.setTearDownCleanup(dictionary=d)
         self.long_type()
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     def test_long_long_type_with_dsym(self):
         """Test that 'long long'-type variables are displayed correctly."""
         d = {'CXX_SOURCES': 'long_long.cpp'}
diff --git a/lldb/test/types/TestFloatTypes.py b/lldb/test/types/TestFloatTypes.py
index 1e17bd6906bd..45ee804f5b5e 100644
--- a/lldb/test/types/TestFloatTypes.py
+++ b/lldb/test/types/TestFloatTypes.py
@@ -6,7 +6,7 @@ import AbstractBase
 import unittest2
 import lldb
 import sys
-from lldbtest import dsym_test, dwarf_test
+from lldbtest import *
 
 class FloatTypesTestCase(AbstractBase.GenericTester):
 
@@ -19,13 +19,13 @@ class FloatTypesTestCase(AbstractBase.GenericTester):
         self.runCmd("settings set auto-confirm true")
         self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_float_type_with_dsym(self):
         """Test that float-type variables are displayed correctly."""
         self.build_and_run('float.cpp', set(['float']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_float_type_from_block_with_dsym(self):
         """Test that float-type variables are displayed correctly from a block."""
@@ -36,13 +36,13 @@ class FloatTypesTestCase(AbstractBase.GenericTester):
         """Test that float-type variables are displayed correctly."""
         self.build_and_run('float.cpp', set(['float']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_double_type_with_dsym(self):
         """Test that double-type variables are displayed correctly."""
         self.build_and_run('double.cpp', set(['double']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_double_type_from_block_with_dsym(self):
         """Test that double-type variables are displayed correctly from a block."""
diff --git a/lldb/test/types/TestFloatTypesExpr.py b/lldb/test/types/TestFloatTypesExpr.py
index f09f88aeb429..33ff0c5c3931 100644
--- a/lldb/test/types/TestFloatTypesExpr.py
+++ b/lldb/test/types/TestFloatTypesExpr.py
@@ -6,7 +6,7 @@ import AbstractBase
 import unittest2
 import lldb
 import sys
-from lldbtest import dsym_test, dwarf_test
+from lldbtest import *
 
 class FloatTypesExprTestCase(AbstractBase.GenericTester):
 
@@ -22,13 +22,13 @@ class FloatTypesExprTestCase(AbstractBase.GenericTester):
         self.runCmd("settings set auto-confirm true")
         self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_float_type_with_dsym(self):
         """Test that float-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('float.cpp', set(['float']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_float_type_from_block_with_dsym(self):
         """Test that float-type variables are displayed correctly from a block."""
@@ -39,13 +39,13 @@ class FloatTypesExprTestCase(AbstractBase.GenericTester):
         """Test that float-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('float.cpp', set(['float']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_double_type_with_dsym(self):
         """Test that double-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('double.cpp', set(['double']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_double_type_from_block_with_dsym(self):
         """Test that double-type variables are displayed correctly from a block."""
diff --git a/lldb/test/types/TestIntegerTypes.py b/lldb/test/types/TestIntegerTypes.py
index 60c75433231b..58e851330618 100644
--- a/lldb/test/types/TestIntegerTypes.py
+++ b/lldb/test/types/TestIntegerTypes.py
@@ -6,7 +6,7 @@ import AbstractBase
 import unittest2
 import lldb
 import sys
-from lldbtest import dsym_test, dwarf_test
+from lldbtest import *
 
 class IntegerTypesTestCase(AbstractBase.GenericTester):
 
@@ -19,13 +19,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         self.runCmd("settings set auto-confirm true")
         self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_char_type_with_dsym(self):
         """Test that char-type variables are displayed correctly."""
         self.build_and_run('char.cpp', set(['char']), qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_char_type_from_block_with_dsym(self):
         """Test that char-type variables are displayed correctly from a block."""
@@ -36,13 +36,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that char-type variables are displayed correctly."""
         self.build_and_run('char.cpp', set(['char']), dsym=False, qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_char_type_with_dsym(self):
         """Test that 'unsigned_char'-type variables are displayed correctly."""
         self.build_and_run('unsigned_char.cpp', set(['unsigned', 'char']), qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_char_type_from_block_with_dsym(self):
         """Test that 'unsigned char'-type variables are displayed correctly from a block."""
@@ -53,13 +53,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that 'unsigned char'-type variables are displayed correctly."""
         self.build_and_run('unsigned_char.cpp', set(['unsigned', 'char']), dsym=False, qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_short_type_with_dsym(self):
         """Test that short-type variables are displayed correctly."""
         self.build_and_run('short.cpp', set(['short']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_short_type_from_block_with_dsym(self):
         """Test that short-type variables are displayed correctly from a block."""
@@ -70,13 +70,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that short-type variables are displayed correctly."""
         self.build_and_run('short.cpp', set(['short']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_short_type_with_dsym(self):
         """Test that 'unsigned_short'-type variables are displayed correctly."""
         self.build_and_run('unsigned_short.cpp', set(['unsigned', 'short']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_short_type_from_block_with_dsym(self):
         """Test that 'unsigned short'-type variables are displayed correctly from a block."""
@@ -87,13 +87,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that 'unsigned short'-type variables are displayed correctly."""
         self.build_and_run('unsigned_short.cpp', set(['unsigned', 'short']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_int_type_with_dsym(self):
         """Test that int-type variables are displayed correctly."""
         self.build_and_run('int.cpp', set(['int']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_int_type_from_block_with_dsym(self):
         """Test that int-type variables are displayed correctly from a block."""
@@ -104,13 +104,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that int-type variables are displayed correctly."""
         self.build_and_run('int.cpp', set(['int']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_int_type_with_dsym(self):
         """Test that 'unsigned_int'-type variables are displayed correctly."""
         self.build_and_run('unsigned_int.cpp', set(['unsigned', 'int']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_int_type_from_block_with_dsym(self):
         """Test that 'unsigned int'-type variables are displayed correctly from a block."""
@@ -121,13 +121,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that 'unsigned int'-type variables are displayed correctly."""
         self.build_and_run('unsigned_int.cpp', set(['unsigned', 'int']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_type_with_dsym(self):
         """Test that long-type variables are displayed correctly."""
         self.build_and_run('long.cpp', set(['long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_type_from_block_with_dsym(self):
         """Test that long-type variables are displayed correctly from a block."""
@@ -138,13 +138,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that long-type variables are displayed correctly."""
         self.build_and_run('long.cpp', set(['long']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_type_with_dsym(self):
         """Test that 'unsigned long'-type variables are displayed correctly."""
         self.build_and_run('unsigned_long.cpp', set(['unsigned', 'long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_type_from_block_with_dsym(self):
         """Test that 'unsigned_long'-type variables are displayed correctly from a block."""
@@ -158,13 +158,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
     # rdar://problem/8482903
     # test suite failure for types dir -- "long long" and "unsigned long long"
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_long_type_with_dsym(self):
         """Test that 'long long'-type variables are displayed correctly."""
         self.build_and_run('long_long.cpp', set(['long long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_long_type_from_block_with_dsym(self):
         """Test that 'long_long'-type variables are displayed correctly from a block."""
@@ -175,13 +175,13 @@ class IntegerTypesTestCase(AbstractBase.GenericTester):
         """Test that 'long long'-type variables are displayed correctly."""
         self.build_and_run('long_long.cpp', set(['long long']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_long_type_with_dsym(self):
         """Test that 'unsigned long long'-type variables are displayed correctly."""
         self.build_and_run('unsigned_long_long.cpp', set(['unsigned', 'long long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_long_type_from_block_with_dsym(self):
         """Test that 'unsigned_long_long'-type variables are displayed correctly from a block."""
diff --git a/lldb/test/types/TestIntegerTypesExpr.py b/lldb/test/types/TestIntegerTypesExpr.py
index 6a0322f75114..4cada92b42ab 100644
--- a/lldb/test/types/TestIntegerTypesExpr.py
+++ b/lldb/test/types/TestIntegerTypesExpr.py
@@ -6,7 +6,7 @@ import AbstractBase
 import unittest2
 import lldb
 import sys
-from lldbtest import dsym_test, dwarf_test
+from lldbtest import *
 
 class IntegerTypesExprTestCase(AbstractBase.GenericTester):
 
@@ -19,13 +19,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         self.runCmd("settings set auto-confirm true")
         self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_char_type_with_dsym(self):
         """Test that char-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('char.cpp', set(['char']), qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_char_type_from_block_with_dsym(self):
         """Test that char-type variables are displayed correctly from a block."""
@@ -36,13 +36,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that char-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('char.cpp', set(['char']), dsym=False, qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_char_type_with_dsym(self):
         """Test that 'unsigned_char'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_char.cpp', set(['unsigned', 'char']), qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_char_type_from_block_with_dsym(self):
         """Test that 'unsigned char'-type variables are displayed correctly from a block."""
@@ -53,13 +53,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that 'unsigned char'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_char.cpp', set(['unsigned', 'char']), dsym=False, qd=True)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_short_type_with_dsym(self):
         """Test that short-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('short.cpp', set(['short']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_short_type_from_block_with_dsym(self):
         """Test that short-type variables are displayed correctly from a block."""
@@ -70,13 +70,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that short-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('short.cpp', set(['short']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_short_type_with_dsym(self):
         """Test that 'unsigned_short'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_short.cpp', set(['unsigned', 'short']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_short_type_from_block_with_dsym(self):
         """Test that 'unsigned short'-type variables are displayed correctly from a block."""
@@ -87,13 +87,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that 'unsigned short'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_short.cpp', set(['unsigned', 'short']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_int_type_with_dsym(self):
         """Test that int-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('int.cpp', set(['int']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_int_type_from_block_with_dsym(self):
         """Test that int-type variables are displayed correctly from a block."""
@@ -104,13 +104,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that int-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('int.cpp', set(['int']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_int_type_with_dsym(self):
         """Test that 'unsigned_int'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_int.cpp', set(['unsigned', 'int']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_int_type_from_block_with_dsym(self):
         """Test that 'unsigned int'-type variables are displayed correctly from a block."""
@@ -121,13 +121,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that 'unsigned int'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_int.cpp', set(['unsigned', 'int']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_type_with_dsym(self):
         """Test that long-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('long.cpp', set(['long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_type_from_block_with_dsym(self):
         """Test that long-type variables are displayed correctly from a block."""
@@ -138,13 +138,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that long-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('long.cpp', set(['long']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_type_with_dsym(self):
         """Test that 'unsigned long'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_long.cpp', set(['unsigned', 'long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_type_from_block_with_dsym(self):
         """Test that 'unsigned_long'-type variables are displayed correctly from a block."""
@@ -158,13 +158,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
     # rdar://problem/8482903
     # test suite failure for types dir -- "long long" and "unsigned long long"
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_long_type_with_dsym(self):
         """Test that 'long long'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('long_long.cpp', set(['long long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_long_long_type_from_block_with_dsym(self):
         """Test that 'long_long'-type variables are displayed correctly from a block."""
@@ -175,13 +175,13 @@ class IntegerTypesExprTestCase(AbstractBase.GenericTester):
         """Test that 'long long'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('long_long.cpp', set(['long long']), dsym=False)
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_long_type_with_dsym(self):
         """Test that 'unsigned long long'-type variable expressions are evaluated correctly."""
         self.build_and_run_expr('unsigned_long_long.cpp', set(['unsigned', 'long long']))
 
-    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @skipUnlessDarwin
     @dsym_test
     def test_unsigned_long_long_type_from_block_with_dsym(self):
         """Test that 'unsigned_long_long'-type variables are displayed correctly from a block."""
diff --git a/lldb/test/warnings/uuid/TestAddDsymCommand.py b/lldb/test/warnings/uuid/TestAddDsymCommand.py
index f6c1565285e3..9b94d8cfc747 100644
--- a/lldb/test/warnings/uuid/TestAddDsymCommand.py
+++ b/lldb/test/warnings/uuid/TestAddDsymCommand.py
@@ -5,7 +5,7 @@ import unittest2
 import lldb
 from lldbtest import *
 
-@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+@skipUnlessDarwin
 class AddDsymCommandCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)