#18709 implements tests that uses `tm.set_timezone` context manager. `set_timezone` begins with: ``` if is_platform_windows(): import pytest pytest.skip("timezone setting not supported on windows") ``` But that apparently isn't raising as expected: https://ci.appveyor.com/project/pandas-dev/pandas/build/1.0.7947/job/2fadgp6te7e95ysc