This is guaranteed to break. minitest 5 is already different in this regard... You really shouldn't fiddle with others' internals.

Addressing this by figuring out the root cause and fixing that might be a lot more stable in the long run. Like:

* why is running via autorun a bad thing?
* who is invoking autorun if zeus is running the tests directly?
* why not let the child process (I'm assuming there) exit, so it runs the tests normally?