Since some weeks I have the curious behaviour of IntelliJ Idea that when a Junit test (or a whole class with several tests) has finished running the debug/run window that shows the test results minimizes. This forces me to open the window again. Since I am starting hundreds of those tests per day this way I am totally annoyed by this. My colleges do not have that issue.
Any idea what configuration causes this and how I can disable that feature?
I think you might have selected this Intellij configuration setting:
Settings > Build, Execution, Deployment > Debugger > Hide debug window on process termination
Just untick that and the Debug window/pane will remain open after the process completes.