The test appears to be occasionally failing. It uses systemd-run to echo
'hello world' into a namespaced journal and then uses journalctl to look for it,
but it doesn't wait.
In the failed runs it can't find it, but the automated journal dump shows
the message at the end.
Use --wait to avoid races.
We were grepping for 'hello world', and in the namespace we would
match on 'hello world', and outside, on 'echo "hello world"'. When
the condition check was fixed, the test gave a false positive.