Since the mob spawnrate has been adjusted to match the number of players in the server, there are barely any mobs in the testing realm since nobody is there. This just defeats the point of having a testing realm if you can’t test it on anything.
bandage solution is to use a monster lure, which spawns them like crazy no matter the number of players
People using lures there causes problems for people like me, who just use nilgarf runes and the testing realm. I save millions on runes (plus a ton of painful travel).