Here is a link to the List discussion on the subject item:
https://lists.fedoraproject.org/archives/search?q=drive+dismount+test+cas...
I don't have a current example of this happening. It was originally
posted to the list by Alan Jenkins while F31 was still Rawhide. I had
seen the problem too; so after a few days and no replies, I picked it
up. The problem disappeared shortly after F31 branched. I didn't file a
bug report; though I would have if it had continued. It just seemed like
something important and basic that should get some attention. Especially
since it was once a test case and had been removed from the matrix.
See ya in a bit
Pat (tablepc)