As u might know u can get an extra re-test by reaching another level or buying one for 200 points (the points go to the tester who agreed to test u for them).
Never posted lvl list:
u reach lvl at:
1. 0 exp
2. 100 exp
3. 250 exp
4. 325 exp
5. 500 exp (here u can buy a vesta dorm test, if I still haven't invited u there)