A quick check before I report, you used to be able to run individual JUnit tests, right? When I press the run button it just runs the entire class instead:

It does work most of the time. There were some complaints higher up with some suggestions. Sometimes deleting Test run configurations, and allowing IntelliJ to create them again works.

That does work, thanks a lot!

It's this bug: https://youtrack.jetbrains.com/issue/KT-33787

Thanks, upvoted.