diff --git a/lldb/source/Expression/ClangASTSource.cpp b/lldb/source/Expression/ClangASTSource.cpp
index dc12501171b1..853d102c5426 100644
--- a/lldb/source/Expression/ClangASTSource.cpp
+++ b/lldb/source/Expression/ClangASTSource.cpp
@@ -974,6 +974,9 @@ ClangASTSource::FindObjCMethodDecls (NameSearchContext &context)
     }     
     ss.Flush();
     
+    if (strstr(ss.GetData(), "$__lldb"))
+        return; // we don't need any results
+    
     ConstString selector_name(ss.GetData());
     
     if (log)
diff --git a/lldb/test/lang/objc/foundation/TestObjCMethods.py b/lldb/test/lang/objc/foundation/TestObjCMethods.py
index f97b1d8506f4..91117214eaea 100644
--- a/lldb/test/lang/objc/foundation/TestObjCMethods.py
+++ b/lldb/test/lang/objc/foundation/TestObjCMethods.py
@@ -113,14 +113,12 @@ class FoundationTestCase(TestBase):
             substrs = ["Foundation`-[NSAutoreleasePool release]"])
 
     @dsym_test
-    @expectedFailureDarwin(15797390)
     def test_expression_lookups_objc_dsym(self):
         """Test running an expression detect spurious debug info lookups (dSYM)."""
         self.buildDsym()
         self.expression_lookups_objc()
 
     @dwarf_test
-    @expectedFailureDarwin(15797390)
     def test_expression_lookups_objc_dwarf(self):
         """Test running an expression detect spurious debug info lookups (DWARF)."""
         self.buildDwarf()