Given that it's so easy to generate better than test stubs with a model and manually review what it thinks covers, I think it's fair to expect a manager to run and add to the tests.

If devops has done their job, it should be trivial for a manager to contribute to the tests and run the build on git push (or manually re-run the build with the web UI).

If a manager has deploy rights, they should be able to run the tests.