Just load up the automated test projects and take a look at the scene files in the asset window for Universal RP tests 36 and 41 (both tests that involve baked lights) and see that they're missing the "TestRunnerBake" label; if you add it and run the tests, those two tests will fail, meaning that there are regressions that the tests missed, or there were updates to the lightmapping that needed to have those reference images updated.