Lastgenre tests new

Hmmm I expected these commits to appear below the previous ones on the #728 page.
So it is a PR to edit another PR :stuck_out_tongue_closed_eyes: ... That's the first time I want to add commits to a PR whose I'm not the author, must have done something wrong but what?!

Good news is : except the form of the PR, it looks good (imo) !
I think authorizing no whitelist makes a lot of sense, I added some more tests and they all pass now.