Current test_shutil is apparently trying to do something that can't work on Windows, so it fails: test_shutil test test_shutil failed -- Traceback (most recent call last): File "C:\Code\python\lib\test\test_shutil.py", line 28, in test_on_error shutil.rmtree(TESTFN, onerror=self.check_args_to_onerror) File "C:\Code\python\lib\shutil.py", line 168, in rmtree onerror(os.rmdir, path, sys.exc_info()) File "C:\Code\python\lib\test\test_shutil.py", line 36, in check_args_to_onerror self.assertEqual(func, os.remove) AssertionError: <built-in function rmdir> != <built-in function remove> 1 test failed: test_shutil After that, it leaves behind temp directories that cause other tests to fail. Sorry, I've got other problems on my stack, and can't make time for this one.