The mutex module has been deprecated for removal in 3.0.
diff --git a/Lib/test/test_py3kwarn.py b/Lib/test/test_py3kwarn.py
index 0b0b92d..7e284e5 100644
--- a/Lib/test/test_py3kwarn.py
+++ b/Lib/test/test_py3kwarn.py
@@ -126,7 +126,7 @@
 
 class TestStdlibRemovals(unittest.TestCase):
 
-    all_platforms = ('audiodev', 'imputil')
+    all_platforms = ('audiodev', 'imputil', 'mutex')
 
     def check_removal(self, module_name):
         """Make sure the specified module, when imported, raises a