First of all, this is NOT a silly issue.
For some reason, a lot of people won't get tested out of fear. "What if they find something wrong with me?" <-- It's more common than you'd think...and it's easier for a lot of people to bury their head in the sand and pretend everything's okay, than to face up to the possibility that there's a slim chance they may have caught something.
Don't give up. You'll both feel better once the testing is over with. And, kudos to you for agreeing to have the testing done on yourself, too!
But, think about this:
I don't like the fact that he became angry about this, and the fact that he didn't want to talk about it. I, personally, would worry about other issues that may come up later on in the relationship. If he doesn't want to talk about, or face, this issue...what else would he not want to face or talk about? /rant
Sorry. I've been burned before, and things like this are way up there in my list of 'red flags.'
Give thanks to Mother Earth for Her greatest gift...
For without it, we would be lost.