I save time via my Do Now today and ask students to clear their desks of all materials except a writing utensil and the approved notes chart from our previous lesson. This gives students a reminder of what we are about to do, and they are able to sharpen pencils and clean up while I take attendance.
I begin the test with the usual reminders:
It's a quiet hour, full of pencil scribbling, eraser fluff, and my stealthy meandering to deter unwanted behavior and be near at hand for questions.