http://www.perlmonks.org?node_id=287889

Once you've finally gotten it into your teammates' heads that checking in code that breaks the build is a Very Bad Thing, you can break the build yourself, and not get blamed for it. How? Very simply. When you discover that one of your teammates has checked in flakey code, add a test case that demonstrates a failure, and check in the test case. Boom, there goes the build. But is is your fault? Heh heh, no.

I'm really loving this aspect of unit testing right now.

(Cue maniacal laughter)