Index: test/expression_command/timeout/TestCallWithTimeout.py
===================================================================
--- test/expression_command/timeout/TestCallWithTimeout.py
+++ test/expression_command/timeout/TestCallWithTimeout.py
@@ -21,6 +21,7 @@
 
     @skipUnlessDarwin
     @dsym_test
+    @expectedFailureDarwin # failed 1/134 runs, line 83, value.IsValid() 
     def test_with_dsym(self):
         """Test calling std::String member function."""
         self.buildDsym()
Index: test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py
===================================================================
--- test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py
+++ test/tools/lldb-server/TestGdbRemote_qThreadStopInfo.py
@@ -80,6 +80,7 @@
 
     @debugserver_test
     @dsym_test
+    @expectedFailureDarwin # failed 1/134 dosep runs, make MAKE_DSYM=YES ARCH=x86_64 CC="clang" failed
     def test_qThreadStopInfo_works_for_multiple_threads_debugserver_dsym(self):
         self.init_debugserver_test()
         self.buildDsym()
Index: test/tools/lldb-server/TestGdbRemote_vCont.py
===================================================================
--- test/tools/lldb-server/TestGdbRemote_vCont.py
+++ test/tools/lldb-server/TestGdbRemote_vCont.py
@@ -106,6 +106,7 @@
 
     @debugserver_test
     @dsym_test
+    @expectedFailureDarwin('http://llvm.org/pr23550') # failed 6/134 dosep runs
     def test_single_step_only_steps_one_instruction_with_vCont_s_thread_debugserver_dsym(self):
         self.init_debugserver_test()
         self.buildDsym()
Index: test/types/TestFloatTypes.py
===================================================================
--- test/types/TestFloatTypes.py
+++ test/types/TestFloatTypes.py
@@ -38,6 +38,7 @@
 
     @skipUnlessDarwin
     @dsym_test
+    @expectedFailureDarwin # failed 1/140 runs 'frame variable --show-types a_union_nonzero_ref.u.a' matches the output (from compiled code): 11001110
     def test_double_type_with_dsym(self):
         """Test that double-type variables are displayed correctly."""
         self.build_and_run('double.cpp', set(['double']))