Describe the bug, including details regarding any error messages, version, and platform.

In order to have green CI we have added a pin for pytest (issue lgpage/pytest-cython#58, see #40487) and for pytest-cython (see #40975).

Both pins (on pytest and pytest-cython) can be removed with pytest-cython 0.3.* bug fix release.
This issue is created to track this work.

Component(s)

Continuous Integration, Python