The current method for grouping tests, which currently only consist of functional tests, simple groups them per module (or similarly). Once we add 150 unit tests it will be unclear how to group them since 53 of them will be related to include files not modules. The other 97 will be related to the individual files of each core module.
Creating groups for each of the include files or related systems coupled with the complete functional test coverage will overload the administration page. I think we need to come up with a better way to group the files, maybe only for unit testing include files.
Another helpful addition might be to create tabs for "Unit" and "Functional" testing on the page with the list of tests.