in this case the message
is misleading in most cases. Your process is likely to wait somewhere in between, before the end event.
A good way to visualize this is enableing the process test coverage: GitHub - camunda-community-hub/camunda-process-test-coverage: Community Extension Helper library to visualize which parts of a BPMN process have been covered by a process test..
With this tool you can see which tasks are already covered by your test and where your process instance is stuck.
My guess is that you checked some service task with Async Before and you have to execute the job explicitly to contine the process instance.
Hope this helps, Ingo