WAY back in the day, when I had just submitting my app, Yale contacted me suggesting I take the January sitting of the College Board “Achievement Tests” (this was the tests’ name before “SAT2” or “Subject Tests”). Testing back then was rudimentary, it seems. I took the ACT once – no real prep other than some stuff in-school. And then, at Yale’s behest, I took these tests. I think I didn’t even send the free score to any of the other Ivies I had applied.
I suppose if I tanked, they could have rejected me. Frankly, the less testing the better. IMHO.