@Son of Hobbes here are a few things I think should go into an application for testers:
-Number of documented grows on AFN or completed journals in the case of not getting to harvest for whatever reason
-Set up: Lights, Tent/Room dimensions, pots, nutrients, medium, etc
-Growing climate: Avg Temps and Humidity
-Personal statement - Why this person wants to test? If applications are breeder specific, why does the person want to be a tester for those genetics?
If I think of anything else I'll be sure to come back and add more.