Continuous Testing
devtalk.net
devtalk.net
I could see a situation where tests running against a live system would be worthwhile, this is what I though when I saw the title.
Continuous testing happens on every save. You safe a file, it gets synced with another machine, the build happens there. If the build succeeds, tests run and you get immediate feedback on whether you broke anything.
Which is great, we're using it on a 4-person jruby project right now.