[[!comment format=mdwn
 username="joey"
 subject="""comment 1"""
 date="2022-08-01T15:31:40Z"
 content="""
This fix is ok, but I don't see any reason to check `INSTALLED_TESTS`,
that is not a concept that this test suite knows about,
and AFAICS the source tree will always be present when running tests.

I've applied a version of the fix without that check. Am making a release
to fix this since I suppose you hit it while updating to the previous
release.
"""]]
