Just a look at the school district's annual report assessment section has indicated that they have used WRAT-4 in the past "for select students" in his grade . So, that may be it.
Thanks AEH for the info on it!

I am going to email and make sure he gets his accommodations (but I'm not going to ask which test it is) His teachers this year are fabulous so I feel pretty confident his accommodations will be in place but it'll put my mind and his mind at ease to be reassured ahead of time. Thnx polarbear!