Do you know what changed regarding 23, 25, and 35, and why it was at the time considered correct to pass them, but now considered correct to fail them?
I gave the links in https://news.ycombinator.com/item?id=18942546 . Essentially, the exception being thrown changed in 23 and 25, and 35 was actually incorrect to begin with, but no one realized it until browsers started implementing Shadow DOM.
That's not super helpful, for example 25 just says "wrong exception". The original commenter seemed to know exactly why these 3 specific tests were failing, I'm also curious what specific specs changed that are no longer true.