Migration group issue

:/ Doesn't work either, command line or scripts. It it still trying to target my main db and never the "tests" one. I also tried  to setup db config in the according file in App\Config with no success. The groups seems totay ignored.

ps: Thanks your for the code example  as i was going to need it..by the way, do you have any idea how to use the rollback() method from a script ? it seems not present in the migrations service.