Yes, but I can run unit tests while I'm coding. Waiting for a check-in is far too late. If I've broken something, it's more helpful to let me know about it ten

Yes, but I can run unit tests while I'm coding. Waiting for a check-in is far too late. If I've broken something, it's more helpful to let me know about it ten seconds later, rather than hours later, when I've pushed my change and broken the build.