Very often I have to switch doing build over a test / diagnostic branch and then switch back to trunk. However, the worst part is that the test run results are stored in periodic (trunk) run results, effectively making it harder to look for trunk builds that were broken (there's no way to distinguish at first sight between test bran run result and normal polling run of trunk).

It would be nice to have Test Build button similar to Build Now button, which would ask for branch repo url (and save the old one if used previously) and then run this test the same as normal build except used Repo urls would be different and this run's result would not litter trunk run build results.