Fix pytorch_macos_10_13_py3_test (#20944)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20944
ghimport-source-id: da2dcbfaff4e0e75f6b4e836fc1af1d8aee11c56
Differential Revision: D15508912
Pulled By: ezyang
fbshipit-source-id: 6758a8a516d0a875a5f6bbbb12e43d899bcf2161
