The Windows buildbots are broken:
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ERROR: test_chown_uid_gid_arguments_must_be_index (test.test_os.MakedirTests)
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Traceback (most recent call last):
File "E:\Data\buildslave\cpython\3.x.snakebite-win2k3r2sp2-x86\build\lib\test\test_os.py", line 875, in test_chown_uid_gid_arguments_must_be_index
self.assertRaises(TypeError, os.chown, support.TESTFN, value, gid)
AttributeError: 'module' object has no attribute 'chown'