Index: Lib/test/test_exceptions.py
===================================================================
--- Lib/test/test_exceptions.py	(revision 82327)
+++ Lib/test/test_exceptions.py	(working copy)
@@ -4,6 +4,12 @@
 import sys
 import unittest
 import pickle
+pickle_implementations = [pickle]
+if '_pickle' in sys.modules:
+    del sys.modules['pickle']
+    sys.modules['_pickle'] = None
+    pickle_implementations.append(__import__('pickle'))
+del pickle
 import weakref
 
 from test.support import (TESTFN, unlink, run_unittest, captured_output,
@@ -302,7 +308,7 @@
                                       value, expected[checkArgName]))
 
                 # test for pickling support
-                for p in [pickle]:
+                for p in pickle_implementations:
                     for protocol in range(p.HIGHEST_PROTOCOL + 1):
                         s = p.dumps(e, protocol)
                         new = p.loads(s)