test_stars currently tries to avoid test duplication by abstracting a lot away in fixtures and parametrizing the tests. The intention behind this certainly was good!
Unfortunately, it leads to the tests being very convoluted, hard to navigate and it being easy to forget updating everything on changes.

I strongly suggest that we instead use the boilerplate approach. It's more manuel, sure, but GitHub Copilot will take care of most of that and the result will be that we now again what we're testing :D