Autocomplete on module target in Run/Debug Configurations is not working anymore.

Hi,

I use a Run/Debug config to run my pytests for test-driven development. That means I switch individual tests quite regularly. In the past, this has worked well. But somehow the autocomplete is not working any more. It's not a big deal, but it used to be more convenient. If I just type the full name of the test myself, it is working as expected. My question here is just about the autocomplete.

It does detect my tests folder:

And, the contained test files/modules:

But it doesn't recognize the tests inside the files. I'm pretty sure this has worked in the past. I'm not sure what changed. I did have a fresh system set up. So maybe I just configured something like the “Mark directory as” wrong. But it is generally working. It's just not auto-completing my tests any more, which I'm sure it did in the past:

If I click on the three dots on the right it doesn't recognize any of my modules:

I couldn't even choose a symbol. 

Any hint would be appreciated!

Thank you :-)