Trial and KeyboardInterrupt have had a long and chequered history (see http://twistedmatrix.com/bugs/issue628). I'd like to try to solve the problem once, and to never have it crop up again. To try to do this, I need effective unit tests for KeyboardInterrupt. However, I've got no idea on how to do this. Raising KeyboardInterrupt isn't enough. Please, someone, write (or tell me how to write) unit tests for Control-C interrupting the Trial process. Thanks, jml