diff --git a/llvm/docs/CommandGuide/lit.rst b/llvm/docs/CommandGuide/lit.rst
index 11337696eb5d..fbe1a9ab1843 100644
--- a/llvm/docs/CommandGuide/lit.rst
+++ b/llvm/docs/CommandGuide/lit.rst
@@ -85,8 +85,6 @@ OUTPUT OPTIONS
  Echo all commands to stdout, as they are being executed.
  This can be valuable for debugging test failures, as the last echoed command
  will be the one which has failed.
- To help you find the source RUN line, :program:`lit` inserts a no-op ``:``
- command with argument ``'RUN: at line N'`` before each command pipeline.
  This option implies ``--verbose``.
 
 .. option:: -a, --show-all
diff --git a/llvm/utils/lit/lit/TestRunner.py b/llvm/utils/lit/lit/TestRunner.py
index 07cda7fa2288..a6f9276f94e3 100644
--- a/llvm/utils/lit/lit/TestRunner.py
+++ b/llvm/utils/lit/lit/TestRunner.py
@@ -789,13 +789,6 @@ def _executeShCmd(cmd, shenv, results, timeoutHelper):
         results.append(cmdResult)
         return cmdResult.exitCode
 
-    if cmd.commands[0].args[0] == ':':
-        if len(cmd.commands) != 1:
-            raise InternalShellError(cmd.commands[0], "Unsupported: ':' "
-                                     "cannot be part of a pipeline")
-        results.append(ShellCommandResult(cmd.commands[0], '', '', 0, False))
-        return 0;
-
     procs = []
     default_stdin = subprocess.PIPE
     stderrTempFiles = []
@@ -1325,8 +1318,7 @@ class IntegratedTestKeywordParser(object):
     def parseLine(self, line_number, line):
         try:
             self.parsed_lines += [(line_number, line)]
-            self.value = self.parser(line_number, line, self.value,
-                                     self.keyword)
+            self.value = self.parser(line_number, line, self.value)
         except ValueError as e:
             raise ValueError(str(e) + ("\nin %s directive on test line %d" %
                                        (self.keyword, line_number)))
@@ -1335,12 +1327,12 @@ class IntegratedTestKeywordParser(object):
         return self.value
 
     @staticmethod
-    def _handleTag(line_number, line, output, keyword):
+    def _handleTag(line_number, line, output):
         """A helper for parsing TAG type keywords"""
         return (not line.strip() or output)
 
     @staticmethod
-    def _handleCommand(line_number, line, output, keyword):
+    def _handleCommand(line_number, line, output):
         """A helper for parsing COMMAND type keywords"""
         # Trim trailing whitespace.
         line = line.rstrip()
@@ -1359,15 +1351,11 @@ class IntegratedTestKeywordParser(object):
         else:
             if output is None:
                 output = []
-            line = ": '{keyword} at line {line}'; {real_command}".format(
-                keyword=keyword,
-                line=line_number,
-                real_command=line)
             output.append(line)
         return output
 
     @staticmethod
-    def _handleList(line_number, line, output, keyword):
+    def _handleList(line_number, line, output):
         """A parser for LIST type keywords"""
         if output is None:
             output = []
@@ -1375,7 +1363,7 @@ class IntegratedTestKeywordParser(object):
         return output
 
     @staticmethod
-    def _handleBooleanExpr(line_number, line, output, keyword):
+    def _handleBooleanExpr(line_number, line, output):
         """A parser for BOOLEAN_EXPR type keywords"""
         if output is None:
             output = []
@@ -1388,18 +1376,17 @@ class IntegratedTestKeywordParser(object):
         return output
 
     @staticmethod
-    def _handleRequiresAny(line_number, line, output, keyword):
+    def _handleRequiresAny(line_number, line, output):
         """A custom parser to transform REQUIRES-ANY: into REQUIRES:"""
 
         # Extract the conditions specified in REQUIRES-ANY: as written.
         conditions = []
-        IntegratedTestKeywordParser._handleList(line_number, line, conditions,
-                                                keyword)
+        IntegratedTestKeywordParser._handleList(line_number, line, conditions)
 
         # Output a `REQUIRES: a || b || c` expression in its place.
         expression = ' || '.join(conditions)
-        IntegratedTestKeywordParser._handleBooleanExpr(line_number, expression,
-                                                       output, keyword)
+        IntegratedTestKeywordParser._handleBooleanExpr(line_number,
+                                                       expression, output)
         return output
 
 def parseIntegratedTestScript(test, additional_parsers=[],
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/basic.txt b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/basic.txt
deleted file mode 100644
index ba2695431bd9..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/basic.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-# RUN: true
-# RUN: false
-# RUN: true
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/line-continuation.txt b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/line-continuation.txt
deleted file mode 100644
index 1e00bcb96163..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/line-continuation.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-# RUN: : first line continued \
-# RUN:   to second line
-# RUN: echo 'foo bar' \
-# RUN: | FileCheck %s
-# RUN: echo \
-# RUN: 'foo baz' \
-# RUN: | FileCheck %s
-# RUN: echo 'foo bar' \
-# RUN: | FileCheck %s
-
-# CHECK: foo bar
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/lit.local.cfg b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/lit.local.cfg
deleted file mode 100644
index 5e87c7299198..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/external-shell/lit.local.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-import lit.formats
-config.test_format = lit.formats.ShTest(execute_external=True)
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/basic.txt b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/basic.txt
deleted file mode 100644
index ba2695431bd9..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/basic.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-# RUN: true
-# RUN: false
-# RUN: true
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/line-continuation.txt b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/line-continuation.txt
deleted file mode 100644
index 1e00bcb96163..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/line-continuation.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-# RUN: : first line continued \
-# RUN:   to second line
-# RUN: echo 'foo bar' \
-# RUN: | FileCheck %s
-# RUN: echo \
-# RUN: 'foo baz' \
-# RUN: | FileCheck %s
-# RUN: echo 'foo bar' \
-# RUN: | FileCheck %s
-
-# CHECK: foo bar
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/lit.local.cfg b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/lit.local.cfg
deleted file mode 100644
index b76b7a24c99e..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/internal-shell/lit.local.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-import lit.formats
-config.test_format = lit.formats.ShTest(execute_external=False)
diff --git a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/lit.cfg b/llvm/utils/lit/tests/Inputs/shtest-run-at-line/lit.cfg
deleted file mode 100644
index b14c52a18425..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-run-at-line/lit.cfg
+++ /dev/null
@@ -1,3 +0,0 @@
-import lit.formats
-config.name = 'shtest-run-at-line'
-config.suffixes = ['.txt']
diff --git a/llvm/utils/lit/tests/Inputs/shtest-shell/colon-error.txt b/llvm/utils/lit/tests/Inputs/shtest-shell/colon-error.txt
deleted file mode 100644
index 8b84c08ce099..000000000000
--- a/llvm/utils/lit/tests/Inputs/shtest-shell/colon-error.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-# Check error on an unsupported ":". (cannot be part of a pipeline)
-#
-# RUN: : | echo "hello"
diff --git a/llvm/utils/lit/tests/max-failures.py b/llvm/utils/lit/tests/max-failures.py
index ca107bc29b9f..1613eee8b5cd 100644
--- a/llvm/utils/lit/tests/max-failures.py
+++ b/llvm/utils/lit/tests/max-failures.py
@@ -8,7 +8,7 @@
 #
 # END.
 
-# CHECK: Failing Tests (27)
+# CHECK: Failing Tests (26)
 # CHECK: Failing Tests (1)
 # CHECK: Failing Tests (2)
 # CHECK: error: Setting --max-failures to 0 does not have any effect.
diff --git a/llvm/utils/lit/tests/shtest-format.py b/llvm/utils/lit/tests/shtest-format.py
index 33ed2fe44d61..94d74e3a9200 100644
--- a/llvm/utils/lit/tests/shtest-format.py
+++ b/llvm/utils/lit/tests/shtest-format.py
@@ -39,7 +39,6 @@
 #
 # CHECK: Command Output (stdout):
 # CHECK-NEXT: --
-# CHECK-NEXT: $ ":" "RUN: at line 1"
 # CHECK-NEXT: $ "printf"
 # CHECK-NEXT: # command output:
 # CHECK-NEXT: line 1: failed test output on stdout
diff --git a/llvm/utils/lit/tests/shtest-output-printing.py b/llvm/utils/lit/tests/shtest-output-printing.py
index 2344ef200367..2a85cf975c9a 100644
--- a/llvm/utils/lit/tests/shtest-output-printing.py
+++ b/llvm/utils/lit/tests/shtest-output-printing.py
@@ -16,15 +16,12 @@
 #
 # CHECK:      Command Output
 # CHECK-NEXT: --
-# CHECK-NEXT: $ ":" "RUN: at line 1"
 # CHECK-NEXT: $ "true"
-# CHECK-NEXT: $ ":" "RUN: at line 2"
 # CHECK-NEXT: $ "echo" "hi"
 # CHECK-NEXT: # command output:
 # CHECK-NEXT: hi
 #
-# CHECK:      $ ":" "RUN: at line 3"
-# CHECK-NEXT: $ "wc" "missing-file"
+# CHECK:      $ "wc" "missing-file"
 # CHECK-NEXT: # redirected output from '{{.*(/|\\\\)}}basic.txt.tmp.out':
 # CHECK-NEXT: missing-file{{.*}} No such file or directory
 # CHECK:      note: command had no output on stdout or stderr
diff --git a/llvm/utils/lit/tests/shtest-run-at-line.py b/llvm/utils/lit/tests/shtest-run-at-line.py
deleted file mode 100644
index 03a516eed85f..000000000000
--- a/llvm/utils/lit/tests/shtest-run-at-line.py
+++ /dev/null
@@ -1,74 +0,0 @@
-# Check that -vv makes the line number of the failing RUN command clear.
-# (-v is actually sufficient in the case of the internal shell.)
-#
-# RUN: not %{lit} -j 1 -vv %{inputs}/shtest-run-at-line > %t.out
-# RUN: FileCheck --input-file %t.out %s
-#
-# END.
-
-
-# CHECK: Testing: 4 tests
-
-
-# In the case of the external shell, we check for only RUN lines in stderr in
-# case some shell implementations format "set -x" output differently.
-
-# CHECK-LABEL: FAIL: shtest-run-at-line :: external-shell/basic.txt
-
-# CHECK:      Script:
-# CHECK:      : 'RUN: at line 1';  true
-# CHECK-NEXT: : 'RUN: at line 2';  false
-# CHECK-NEXT: : 'RUN: at line 3';  true
-
-# CHECK:     Command Output (stderr)
-# CHECK:     RUN: at line 1
-# CHECK:     RUN: at line 2
-# CHECK-NOT: RUN
-
-# CHECK-LABEL: FAIL: shtest-run-at-line :: external-shell/line-continuation.txt
-
-# CHECK:      Script:
-# CHECK:      : 'RUN: at line 1';  : first line continued    to second line
-# CHECK-NEXT: : 'RUN: at line 3';  echo 'foo bar'  | FileCheck
-# CHECK-NEXT: : 'RUN: at line 5';  echo  'foo baz'  | FileCheck
-# CHECK-NEXT: : 'RUN: at line 8';  echo 'foo bar'  | FileCheck
-
-# CHECK:     Command Output (stderr)
-# CHECK:     RUN: at line 1
-# CHECK:     RUN: at line 3
-# CHECK:     RUN: at line 5
-# CHECK-NOT: RUN
-
-
-# CHECK-LABEL: FAIL: shtest-run-at-line :: internal-shell/basic.txt
-
-# CHECK:      Script:
-# CHECK:      : 'RUN: at line 1';  true
-# CHECK-NEXT: : 'RUN: at line 2';  false
-# CHECK-NEXT: : 'RUN: at line 3';  true
-
-# CHECK:      Command Output (stdout)
-# CHECK:      $ ":" "RUN: at line 1"
-# CHECK-NEXT: $ "true"
-# CHECK-NEXT: $ ":" "RUN: at line 2"
-# CHECK-NEXT: $ "false"
-# CHECK-NOT:  RUN
-
-# CHECK-LABEL: FAIL: shtest-run-at-line :: internal-shell/line-continuation.txt
-
-# CHECK:      Script:
-# CHECK:      : 'RUN: at line 1';  : first line continued to second line
-# CHECK-NEXT: : 'RUN: at line 3';  echo 'foo bar'  | FileCheck
-# CHECK-NEXT: : 'RUN: at line 5';  echo  'foo baz'  | FileCheck
-# CHECK-NEXT: : 'RUN: at line 8';  echo 'foo bar'  | FileCheck
-
-# CHECK:      Command Output (stdout)
-# CHECK:      $ ":" "RUN: at line 1"
-# CHECK-NEXT: $ ":" "first" "line" "continued" "to" "second" "line"
-# CHECK-NEXT: $ ":" "RUN: at line 3"
-# CHECK-NEXT: $ "echo" "foo bar"
-# CHECK-NEXT: $ "FileCheck" "{{.*}}"
-# CHECK-NEXT: $ ":" "RUN: at line 5"
-# CHECK-NEXT: $ "echo" "foo baz"
-# CHECK-NEXT: $ "FileCheck" "{{.*}}"
-# CHECK-NOT:  RUN
diff --git a/llvm/utils/lit/tests/shtest-shell.py b/llvm/utils/lit/tests/shtest-shell.py
index ed0bdf35fe11..b3d55a0c6a91 100644
--- a/llvm/utils/lit/tests/shtest-shell.py
+++ b/llvm/utils/lit/tests/shtest-shell.py
@@ -26,14 +26,6 @@
 # CHECK: error: command failed with exit status: 1
 # CHECK: ***
 
-# CHECK: FAIL: shtest-shell :: colon-error.txt
-# CHECK: *** TEST 'shtest-shell :: colon-error.txt' FAILED ***
-# CHECK: $ ":"
-# CHECK: # command stderr:
-# CHECK: Unsupported: ':' cannot be part of a pipeline
-# CHECK: error: command failed with exit status: 127
-# CHECK: ***
-
 # CHECK: FAIL: shtest-shell :: diff-error-0.txt
 # CHECK: *** TEST 'shtest-shell :: diff-error-0.txt' FAILED ***
 # CHECK: $ "diff" "diff-error-0.txt" "diff-error-0.txt"
@@ -161,7 +153,7 @@
 #
 # CHECK: FAIL: shtest-shell :: error-1.txt
 # CHECK: *** TEST 'shtest-shell :: error-1.txt' FAILED ***
-# CHECK: shell parser error on: ': \'RUN: at line 3\'; echo "missing quote'
+# CHECK: shell parser error on: 'echo "missing quote'
 # CHECK: ***
 
 # CHECK: FAIL: shtest-shell :: error-2.txt
@@ -227,4 +219,4 @@
 # CHECK: PASS: shtest-shell :: sequencing-0.txt
 # CHECK: XFAIL: shtest-shell :: sequencing-1.txt
 # CHECK: PASS: shtest-shell :: valid-shell.txt
-# CHECK: Failing Tests (27)
+# CHECK: Failing Tests (26)
diff --git a/llvm/utils/lit/tests/unit/TestRunner.py b/llvm/utils/lit/tests/unit/TestRunner.py
index b3988b0c1970..874bf275d4ea 100644
--- a/llvm/utils/lit/tests/unit/TestRunner.py
+++ b/llvm/utils/lit/tests/unit/TestRunner.py
@@ -47,7 +47,7 @@ class TestIntegratedTestKeywordParser(unittest.TestCase):
 
     @staticmethod
     def make_parsers():
-        def custom_parse(line_number, line, output, keyword):
+        def custom_parse(line_number, line, output):
             if output is None:
                 output = []
             output += [part for part in line.split(' ') if part.strip()]
@@ -99,8 +99,8 @@ class TestIntegratedTestKeywordParser(unittest.TestCase):
         cmd_parser = self.get_parser(parsers, 'MY_RUN:')
         value = cmd_parser.getValue()
         self.assertEqual(len(value), 2)  # there are only two run lines
-        self.assertEqual(value[0].strip(), ": 'MY_RUN: at line 4';  baz")
-        self.assertEqual(value[1].strip(), ": 'MY_RUN: at line 7';  foo  bar")
+        self.assertEqual(value[0].strip(), 'baz')
+        self.assertEqual(value[1].strip(), 'foo  bar')
 
     def test_custom(self):
         parsers = self.make_parsers()