Invoice printouts, payroll files cannot be tested with RSAT currently. This might be a long shot, but this would be a nice to have, because we can only test these manually.
If we're doing our test case recordings right, we will always have the same files each time we run the test case.
We could attach this file in devops, that RSAT would compare the exported/downloaded file to. If it's an excel file, it could compare if the same values appear in the same cells, etc.