[self-tests] tests fail against Pytest 9 #1030

______________________ ERROR collecting tests/benchmarks _______________________
/usr/lib/python3/site-packages/pluggy/_manager.py:168: in register
    self._verify_hook(hook, hookimpl)
/usr/lib/python3/site-packages/pluggy/_manager.py:355: in _verify_hook
    _warn_for_function(argname_warning, hookimpl.function)
/usr/lib/python3/site-packages/pluggy/_manager.py:41: in _warn_for_function
    warnings.warn_explicit(
E   pytest.PytestRemovedIn9Warning: The (path: py.path.local) argument is deprecated, please use (collection_path: pathlib.Path)
E   see https://docs.pytest.org/en/latest/deprecations.html#py-path-local-arguments-for-hooks-replaced-with-pathlib-path