Hi @marcelubach,
I’m glad you asked! 
In fact we do have some rules specifically for tests. Unfortunately, I’m not sure many have been implemented for languages other than Java, but at one point an objective to give tests more love was on the table for next year. No idea whether it will make the cut, but if you need these types of rules for other languages, feel free to agitate for them here in new threads.
HTH,
Ann