$ bin/runtests ../britney2/britney.py t /tmp/test-out
N: Using Time::HiRes to calculate run times
Running arch-all-uninstallable...ERROR: ../britney2/britney.py did not produce a HeidiResult at /tmp/test-out/arch-all-uninstallable/var/data/output/HeidiResult - perhaps a silent failure!? at bin/runtests.pl line 86.