Fix unit tests

Oops, I broke them. To compensate, let's make GitLab run them from now on.

added 3 commits

• 3f188f67 - 1 commit from branch apertis/v2019dev0
• e273d9c5 - Fix unit tests after changing branches too eagerly
• 4c80a503 - gitlab-ci: Run unit tests

Compare with previous version

merged