pickle.py has a few doctest'ed internal functions, so run their tests.
diff --git a/Lib/test/test_pickle.py b/Lib/test/test_pickle.py
index 8870904..ac2a596 100644
--- a/Lib/test/test_pickle.py
+++ b/Lib/test/test_pickle.py
@@ -69,6 +69,7 @@
     suite.addTest(loader.loadTestsFromTestCase(PicklerTests))
     suite.addTest(loader.loadTestsFromTestCase(PersPicklerTests))
     test_support.run_suite(suite)
+    test_support.run_doctest(pickle)
 
 if __name__ == "__main__":
     test_main()