I have.mypy.ini file that I use for my projects, in my home directory, and it's pretty strict.
It took me some time to find out that all thetypeshed test failures I see are due to the fact thatmypy finds that config file and uses it to run tests.

Besides this confusion, that can lead to a more serious problem when someone has a relaxed.mypy.ini in one's home, and that could cause the tests to pass while in fact they should not.

Suggestion: having a correctmypy.ini inside thetypeshed and configuring all the test scripts to use it explicitly.

Probably something similar should be done forpytype.cfg and.flake8.