Is there a way to opt out of PytestReturnNotNoneWarning ?

[pllim]

As of pytest 7.2.0 , any test function that returns something not a None now gets a PytestReturnNotNoneWarning. Looking at its memo in https://github.com/pytest-dev/pytest/blob/main/doc/en/deprecations.rst , I do not see a way to tell pytest, "It's okay, this return is intentional, just let it return stuff and not emit the warning."

How do I opt out of this warning?

What's the problem this feature will solve?

This will let me keep using https://github.com/matplotlib/pytest-mpl plugin because it requires returning the Matplotlib figure object for image comparison.

Describe the solution you'd like

Let me opt out.

Alternative Solutions

Tell https://github.com/matplotlib/pytest-mpl devs how to rework their plugin to not return stuff.

Additional context

astropy/astropy#13892 (we do not want to pin maxversion of pytest if we can help it)

[nicoddemus]

@pllim you can configure filterwarnings to ignore that warning.

But this brings to attention that pytest-mpl probably needs to be updated, as we plan to make this a hard error in the future (following unittest, which is going in the same direction).

[pllim]

@nicoddemus , ignoring warning won't solve the problem when you turn it into exception though.

[nicoddemus]

Nope it won't, that's why I said "pytest-mpl probably needs to be updated".

[pllim]

Okay. I also asked at matplotlib/pytest-mpl#183 🤞

[The-Compiler]

Also see #10421