Issue #6137: The pickle module now translates module names when loading
or dumping pickles with a 2.x-compatible protocol, in order to make data
sharing and migration easier. This behaviour can be disabled using the
new `fix_imports` optional argument.
diff --git a/Lib/test/test_pickletools.py b/Lib/test/test_pickletools.py
index 3e701b0..823b0c2 100644
--- a/Lib/test/test_pickletools.py
+++ b/Lib/test/test_pickletools.py
@@ -12,6 +12,9 @@
     def loads(self, buf):
         return pickle.loads(buf)
 
+    # Test relies on precise output of dumps()
+    test_pickle_to_2x = None
+
 
 def test_main():
     support.run_unittest(OptimizedPickleTests)