I like that we're proactively printing this, but I'm wondering how it will work with different kinds of output. Did you test when running tests in parallel? I want to make sure this is part of the phpunit error output if possible, and doesn't get spontaneously printed in the middle of a row of dots while other tests are still continuing. Does that make sense?

Essentially, run with paratest and confirm for me that this shows up in a decent place :-)