Ok, spent a day trying to figure out wtf is with routing in the mocked tests.
Eventually, after 8pm, came to a conclusion that I can just mock one last thing that was not mocked, and that will be it. But will do it tomorrow.
Two other test suites will need more attention.
Fck.
Nothing else there, except that I skipped two (non-obligatory) meetings.
I guess normal people don't use Scala Play, neither version.