I witnessed the state testing in the school I worked in last year. Lots of anxious kids coming out of class for the bathroom every half hour! The school made such a big deal of it and prepped the kids for months. Probably right after the new year started, for testing in March or April. Craziness. They even had an assembly before the test in an attempt to get the kids all pumped up about it (or put the pressure on).
DS had a page on his IEP where the school checked a box to take it the normal way, take it with modifications, or not take it at all, so I know there are options here if a kid has an IEP. I would ask about it. That page wasn't filled out for DS because he's only in first grade.