FWIW, my DD loved the SCAT testing environment, because the test space (even with multiple other testers) was silent as a tomb. People don't even breathe loud in there, in large part because the adults are usually there for high-stakes testing of their own, where an invalidated score or a report of irregularity can cost a significant amount of time and money.
At our test site, I was not allowed to leave the building (and was asked to stay in the waiting area other than to use the restroom or get a drink). The test monitor would have put DD in the waiting room if she'd come out while I'd been in the bathroom, but that's it.
