Is it a good idea to take 3 SAT Subject Tests in one sitting?

My mom is worried that I’ll burn out and not do as well as if I had spaced them out on different dates. I’m a Junior, so I do have time to do that, but I’d rather take care of as much testing as possible in one sitting.

I plan on taking Literature, Math 1, and U.S. History. Do you think that's a good idea?

Your question is similar to another question that we've already answered. Please see the response here. Essentially, no, it's probably not a good idea to take all three tests on the same day.