pytest doesnt like iterables while parametrizing - #3907

Why does this only show up in the nightly pipeline? Do we use an old pytest version?

Yes - the warning came in pytest 9.1.0 and we are pinned to 9.0.2 right now https://github.com/scipp/scipp/blob/main/requirements/test.txt

Is it worth running the nightly job from this branch to 'prove' that this indeed has fixed the issue?

Yes - the warning came in pytest 9.1.0 and we are pinned to 9.0.2 right now https://github.com/scipp/scipp/blob/main/requirements/test.txt

So it used to work but no longer?

Yup - https://docs.pytest.org/en/stable/deprecations.html#parametrize-iterators

Is it worth running the nightly job from this branch to 'prove' that this indeed has fixed the issue?

The wheel building works fine now https://github.com/scipp/scipp/actions/runs/27748287499/job/82091967848?pr=3907
The failure is the upload failure (as it should)