> @support.requires_resource('audio')?

The point is that the noise is extraneous and should be optional.  I want the tests to run (quietly) when I run them with unittest (which is most of the time) and anytime -ugui is true (too few of the buildbots).  It was not too hard fix and has bonuses both for normal running and for tests.  The parenmatch module has an option to turn off noise, and I might generalize that option, while still providing visual signals.