Hello, As we all know, USE=test is a little special, being switched by Portage FEATURES=test (and probably other PMs as well). Considering the fact that it is used widely, I think we should consider describing it in PMS or someplace else. The exact rationale for this discussion is Johan's attempt of using USE=test to decide what is installed with a package: if tests would be installed through USE=test (should they be a part of package?) we'd need to start setting other depends ( DEPEND=test? ( dev-python/subvertpy[test] ) ) Honestly, I'm not sure if this is really supposed to work. I personally wouldn't risk using it. I suppose it could even start raising mayhem and hurting puppies. But if we consider this just by looking at PMS, it is absolutely fine. Moreover, due to PMS USE=test would be just another USEflag, and src_test() could be run with or without it. If we even aren't going to describe USE=test thoroughly there, I think we should mention that src_test() can be run only with USE=test set or something like that. -- Best regards, Michał Górny