`TestingDirAuthVoteGuard` is examined before `rs->nickname` is populated in `set_routerstatus_from_routerinfo()`, so nickname routersets won't work. In my case, all relays in my testing network were marked as guards, but I'm not sure why. Moving the `TestingDirAuthVoteGuard` examination further down the function might fix the problem, but we should also maek sure that it supports all other routerset types. This is just a testing network issue btw.