Private middle schools requiring COVID test before returning in September

I am wondering if some private middle schools are either requiring, or strongly recommending, kids get COVID tests before returning in September. Would like to hear what the landscape is.

All students and staff tested before attending (5-12 grade day school) and testing is provided at school, family agreement to notify school of all travel occurring after Aug 1st and will also test during school year. Contract with private lab company - school still starting remotely - so testing will begin 2 weeks before new start date - tbd.