CI Workflow fails since 2 weeks in my fork of home-assistant/core

Does anyone have an idea, why my fork of home-assistant/core fails still 2 weeks?

The fork can be found here: https://github.com/dstrigl/core

It always fails with the following error

...
ModuleNotFoundError: No module named '_pytest.resultlog'
Error: Process completed with exit code 1.

in “Run tests Python 3.x” of the CI Workflow.

Regards,
Daniel.