With frequent updates to RSAT, a growing test library, and local test files, it is not always clear if all test cases have been updated.

e.g. I want to run 40 cases, but get a warning that 'some' exdecution files are not up to date.

Either display the mismatch in the grid of cases or name the mismatching cases in the error msg.
Ideas Administrator

This functionality is already available. You need to turn on the option "Enable local validation rules".