The test you could easily cheat on is the only one that really measures who you are.

When the rules are enforced, behaving well tells you nothing about a person, only about the enforcement. Remove the supervision and the choice becomes real, because now the only thing holding the line is whatever you have decided to be. Those situations are rarer than they used to be and much more informative when they arrive.

Notice the next time you could take something and nobody would know. Treat it as information rather than temptation. Whatever you do there is a more accurate picture of you than anything done while being watched.