@Mathiason He could try to figure it out. Like for instance, trying to see what others do.
If you notice that nobody in your village uses magic, you can learn that maybe they don't know about magic.
Hell, he could have asked his parents if people know magic (simple as that).
He could ask what is the normal standard for a test. See what people normally do.
He has eyes and ears and he is obviously not in a rush.