Just wanted to wish you good luck. Like others said I think you need to explain to him that there will be very easy and boring questions and they are there so everybody could answer at least a few questions. Then there will be questions he won't be able to answer but that's completely normal and he should just try and see.
Mention the break to both him and the psychologist. My son refused to take a break for his achievement test when offered. Silly kid.
Good luck. Fingers crossed that he is in good mood, does his best and everything goes smoothly.
