@kcooney while I was thinking about how to accomplish that (and thinking whether or not I need to add a mocking library for that purpose, and if that were allowed), I finally found out why I am kind of hesitating or thinking that may not be fully sufficient or so => Can you please have a look at the recent changes which actually address my previous comment:

> (Please note I am not fully happy about `CustomFailOnTimeout.createTimeoutException()` yet: while I have full flexibility in my custom timeout exception creation, it feels a bit awkward.)