What can we say, "the tests hang"? That doesn't seem to be very useful.

I did try to investigate it further, and the weird thing is: if I run the hanging test (judging by the last message in the console) by itself, it runs flawlessly! So I assume it's actually the cleanup of one of the earlier tests that failed, for example a kill of a child process that didn't work because of platform differences. IIRC it was indeed in the test zone of launching child processes and stopping them again.

I'm new to POE, so I'm nowhere familiar with the internals. But I promise one of these days I'll inspect it more closely while running the (edited) tests, to see exactly where it hangs.