Fixes isses misses due to "invisible" tests #9

Job	Run time
integration-dummy / Run dummy	1m 15s
build-cache / Build and cache OpenMPI 5	43s
pip-install / test-pip-install	1m 8s
domain-decomp / Run domain decomposition unit tests	1m 1s
adaptivity-serial / Unit and integration tests	1m 10s
adaptivity-parallel / Integration tests	1m 22s
coverage / Run test coverage check	1m 28s
unit-tests / unit_tests	1m 54s
adaptivity-parallel / Unit tests	1m 16s
	11m 17s

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