I appreciate the project, but unless you explain what are you trying to achieve with that, I will need to spend some time to understand your test, that contains a main class instead of assertions, so it is pretty time consume to understand what is doing.
There might be an incompatibility, so let's try to find out what it is.
Can you please explain a little bit of the context of what you are trying to achieve?
I've tried your example with 6.0.0 and it shows the same issue, so there might be something fundamentally wrong with the way that the test is executing jobs and executing them. Did you manage to get it working with 6.0.0?
No problem, don't invest time in obsolete version !
I read your all blog posts with attention, I'm really impressed by the recent improvements and progress on Activiti 7.
Concerning my enhancement, I thought it's a bad idea to instantiate threads to retrieve jobs to treats and expired jobs (timerJobAcquisitionThread,asyncJobAcquisitionThread & asyncJobAcquisitionThread). It will be better to use a java.util.concurrent.ScheduledExecutorService or org.springframework.scheduling.TaskScheduler.