[PR #13980/9f992b8b backport][9.0.x] config: Add a test for -o with invalid option#13994

nicoddemus merged 2 commits into9.0.xpytest-dev/pytest:9.0.xfrom

patchback/backports/9.0.x/9f992b8b61264ef5d010783e0d31b63d859f0071/pr-13980pytest-dev/pytest:patchback/backports/9.0.x/9f992b8b61264ef5d010783e0d31b63d859f0071/pr-13980Copy head branch name to clipboard