Hi,

To remove an autotest , as you found out, you can remove the related file, or if you want to remove on test in that class, just delete the related code.
However this is not intuitive, so we'll see how to make it easier from the IDE to remove an auto test.

Now about the issue you experienced, we were not able to reproduce it with EiffelStudio 17.01 (latest release) and 16.05 , on Windows or Linux.
Are you able to reproduce it easily ?
If yes, can you, please, provide us either with an archive of a small system that exhibits this issue, or with more details to reproduce it?