No, because that would mean if something became a fatal error I'd have zero output. What I will do, as I just said, is capture build messages in the test artifacts, so I can tell what else is happening.

(For example, the testsuite does not capture or use your make script, so the sha macro y'all use in your boilerplate doesn't match. That's a fatal error! But it's also irrelevant for testing purposes, and I have plenty of macro tests elsewhere.)