Over SciPy we have started to see the message in the title in our Azure Pipelines which started picking up 7.1.0 instead of 7.0.1 lastn ight. From the deprecation and removal list we couldn't see which item might have caused it.

One speculation we might generate is that our slow mark is not registered in our pytest.ini file explicitly and maybe registrations are now obligatory.

Here is a complete SciPy test suite example with all installation steps provided.

https://dev.azure.com/scipy-org/SciPy/_build/results?buildId=16988&view=logs&jobId=7d84eb14-5b07-5555-8e62-838a7038a2b0&j=ede89041-5e8e-5201-ce5c-f68c2cbf02dd&t=141d9d53-a127-58b4-0262-4b9693c8e91f

And our pytest.ini file lives here

https://github.com/scipy/scipy/blob/main/pytest.ini

Thank you for all the efforts.