http://www.python.org/dev/buildbot/3.x/builders/x86 Tiger 3.x/builds/6/steps/test/logs/stdio test test_ntpath failed -- Traceback (most recent call last): File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/test_genericpath.py", line 288, in test_abspath_issue3426 with support.temp_cwd(b'\xe7w\xf0'): File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/contextlib.py", line 17, in __enter__ return next(self.gen) File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/support.py", line 392, in temp_cwd os.mkdir(name) OSError: [Errno 22] Invalid argument As discussed on IRC: Mac OS X deny the creation of a directory with an invalid utf8 name. The test should be skipped on Mac OS X (sys.platform == 'darwin').