Hi Marcel, Tobias,
I encountered a bug, when playing a sound, the default SoundService (class inst var) was not a class (BasedSoundService) but an instance (a BasedSoundService).
Why?
Because, there is a TileMorphTest>>setUp that remember which is the default, then tries to restore it in tearDown.
It used to work.
But, in between, SoundService default and defaultOrNil have been re-defined so as to answer an instance rather than a class.
Thus, when we play the tests, we can no more play the sounds...