Index: test/expression_command/formatters/TestFormatters.py
===================================================================
--- test/expression_command/formatters/TestFormatters.py
+++ test/expression_command/formatters/TestFormatters.py
@@ -26,7 +26,6 @@
         self.do_my_test()
 
     @expectedFailureFreeBSD('llvm.org/pr19011') # Newer Clang omits C1 complete object constructor
-    @expectedFailureLinux('llvm.org/pr20230')
     @dwarf_test
     def test_with_dwarf(self):
         """Test expr + formatters for good interoperability."""
Index: test/functionalities/attach_resume/TestAttachResume.py
===================================================================
--- test/functionalities/attach_resume/TestAttachResume.py
+++ test/functionalities/attach_resume/TestAttachResume.py
@@ -22,7 +22,7 @@
         self.buildDwarf()
         self.process_attach_continue_interrupt_detach()
 
-    @expectedFailureLinux('llvm.org/pr19478')
+    @expectedFailureLinux('llvm.org/pr19478') # intermittent ~2/14 runs
     @skipIfRemote
     def process_attach_continue_interrupt_detach(self):
         """Test attach/continue/interrupt/detach"""
Index: test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py
===================================================================
--- test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py
+++ test/functionalities/data-formatter/data-formatter-synthval/TestDataFormatterSynthVal.py
@@ -20,10 +20,6 @@
         self.data_formatter_commands()
 
     @skipIfFreeBSD # llvm.org/pr20545 bogus output confuses buildbot parser
-    @expectedFailureLinux # non-core functionality, need to reenable and fix
-                          # later (DES 2014.11.07). Most likely failing because
-                          # of mis-match is version of libstdc++ supported by
-                          # the data-formatters.
     @dwarf_test
     def test_with_dwarf_and_run_command(self):
         """Test using Python synthetic children provider to provide a value."""
Index: test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py
===================================================================
--- test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py
+++ test/functionalities/data-formatter/rdar-9974002/Test-rdar-9974002.py
@@ -21,7 +21,6 @@
         self.data_formatter_commands()
 
     @dwarf_test
-    @expectedFailureLinux("llvm.org/pr20232")
     def test_with_dwarf_and_run_command(self):
         """Test data formatter commands."""
         self.buildDwarf()
Index: test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py
===================================================================
--- test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py
+++ test/functionalities/dynamic_value_child_count/TestDynamicValueChildCount.py
@@ -21,7 +21,7 @@
         self.buildDsym(dictionary=self.getBuildFlags())
         self.do_get_dynamic_vals()
 
-    @expectedFailureLinux # FIXME: This needs to be root-caused.  It looks like the DWARF info is anticipating the derived class assignment.
+    @expectedFailureLinux("llvm.org/pr23039")
     @expectedFailureFreeBSD("llvm.org/pr19311") # continue at a breakpoint does not work
     @python_api_test
     @dwarf_test
Index: test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
===================================================================
--- test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
+++ test/functionalities/expr-doesnt-deadlock/TestExprDoesntBlock.py
@@ -24,7 +24,6 @@
 
     @dwarf_test
     @expectedFailureFreeBSD('llvm.org/pr17946')
-    @expectedFailureLinux('llvm.org/pr15258') # disabled due to assertion failure in ProcessMonitor::GetCrashReasonForSIGSEGV:
     def test_with_dwarf_and_run_command(self):
         """Test that expr will time out and allow other threads to run if it blocks."""
         self.buildDwarf()
Index: test/functionalities/inferior-assert/TestInferiorAssert.py
===================================================================
--- test/functionalities/inferior-assert/TestInferiorAssert.py
+++ test/functionalities/inferior-assert/TestInferiorAssert.py
@@ -38,7 +38,6 @@
 
     @expectedFailurei386("llvm.org/pr17384: lldb needs to be aware of linux-vdso.so to unwind stacks properly")
     @expectedFailureFreeBSD('llvm.org/pr18533 - PC in __assert frame is outside of function')
-    @expectedFailureLinux("PC in __GI___assert_fail frame is just after the function (this is a no-return so there is no epilogue afterwards)")
     @expectedFailureWindows("llvm.org/pr21793: need to implement support for detecting assertion / abort on Windows")
     def test_inferior_asserting_disassemble(self):
         """Test that lldb reliably disassembles frames after asserting (command)."""
Index: test/functionalities/inferior-crashing/TestInferiorCrashing.py
===================================================================
--- test/functionalities/inferior-crashing/TestInferiorCrashing.py
+++ test/functionalities/inferior-crashing/TestInferiorCrashing.py
@@ -66,7 +66,6 @@
         self.inferior_crashing_step_after_break()
 
     @skipIfFreeBSD # llvm.org/pr16684
-    @expectedFailureLinux # due to llvm.org/pr15988 -- step over misbehaves after crash
     def test_inferior_crashing_step_after_break_dwarf(self):
         """Test that lldb functions correctly after stepping through a crash."""
         self.buildDwarf()
@@ -79,7 +78,6 @@
         self.inferior_crashing_expr_step_expr()
 
     @expectedFailureFreeBSD('llvm.org/pr15989') # Couldn't allocate space for the stack frame
-    @expectedFailureLinux # due to llvm.org/pr15989 -- expression fails after crash and step
     def test_inferior_crashing_expr_step_and_expr_dwarf(self):
         """Test that lldb expressions work before and after stepping after a crash."""
         self.buildDwarf()
Index: test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py
===================================================================
--- test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py
+++ test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py
@@ -21,8 +21,7 @@
         self.setTearDownCleanup(dictionary=self.d)
         self.hello_multiple_threads()
 
-    @skipIfGcc # causes intermittent gcc debian buildbot failures, skip until we can investigate
-    @expectedFailureLinux("llvm.org/pr20233") # note due to a @skipIfGcc above, this is going to check failure on Linux if using non-GCC (most likely clang)
+    @expectedFailureGcc("llvm.org/pr20233")
     @dwarf_test
     def test_watchpoint_multiple_threads_with_dwarf(self):
         """Test that lldb watchpoint works for multiple threads."""
Index: test/lang/cpp/class_types/TestClassTypes.py
===================================================================
--- test/lang/cpp/class_types/TestClassTypes.py
+++ test/lang/cpp/class_types/TestClassTypes.py
@@ -10,7 +10,6 @@
 class ClassTypesTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
-    failing_compilers = ['clang', 'gcc']
 
     @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
     @dsym_test
@@ -74,7 +73,6 @@
     # test/class_types test failures: runCmd: expr this->m_c_int
     @dwarf_test
     @expectedFailureFreeBSD('llvm.org/pr14540')
-    @expectedFailureLinux('llvm.org/pr14540', failing_compilers)
     @expectedFailureDarwin(16362674)
     def test_with_dwarf_and_constructor_name (self):
         """Test 'frame variable this' and 'expr this' when stopped inside a constructor."""
Index: test/lang/cpp/dynamic-value/TestDynamicValue.py
===================================================================
--- test/lang/cpp/dynamic-value/TestDynamicValue.py
+++ test/lang/cpp/dynamic-value/TestDynamicValue.py
@@ -21,7 +21,6 @@
         self.do_get_dynamic_vals()
 
     @expectedFailureFreeBSD # FIXME: This needs to be root-caused.
-    @expectedFailureLinux # FIXME: This needs to be root-caused.  It looks like the DWARF info is anticipating the derived class assignment.
     @python_api_test
     @dwarf_test
     def test_get_dynamic_vals_with_dwarf(self):
Index: test/python_api/thread/TestThreadAPI.py
===================================================================
--- test/python_api/thread/TestThreadAPI.py
+++ test/python_api/thread/TestThreadAPI.py
@@ -75,7 +75,7 @@
         self.step_out_of_malloc_into_function_b(self.exe_name)
 
     @expectedFailureFreeBSD # llvm.org/pr20476
-    @expectedFailureLinux # llvm.org/pr14416
+    @expectedFailureLinux # need to 'thread step-out' twice to get out of malloc
     @python_api_test
     @dwarf_test
     def test_step_out_of_malloc_into_function_b_with_dwarf(self):
Index: test/python_api/value_var_update/TestValueVarUpdate.py
===================================================================
--- test/python_api/value_var_update/TestValueVarUpdate.py
+++ test/python_api/value_var_update/TestValueVarUpdate.py
@@ -19,7 +19,6 @@
         self.setTearDownCleanup(dictionary=self.d)
         self.do_test()
 
-    @expectedFailureLinux # non-core functionality, need to reenable and fix later (DES 2014.11.07)
     @expectedFailureFreeBSD("llvm.org/pr21620 GetValueDidChange() wrong")
     @python_api_test
     @dwarf_test