I think I once wrote this here before, but I’ll post it again.
My wife was living in Israel, but had come to the US to date. We started going out, and we hit it off pretty quickly. Then I discovered she’d never had the Dor Yesharim testing done. We didn’t know what to do. We liked each other and knew it was heading towards our getting engaged – should we wait for her to get tested? She called her father in Israel, and he went to ask R’ Chaim Kanievsky. R’ Chaim answered him, “You know, I never got tested by Dor Yesharim either!” My FIL replied, “Ok, but what should they do? Should they wait?” R’ Chaim said, “No, she shouldn’t get tested. I give them a bracha that all their children should be healthy!”