+The driver should output TAP (Test Anything Protocol) so that tests can be run
+in a test harness such as [prove](http://search.cpan.org/perldoc?prove). The
+default Makefile template has a `prove` target (type ":make prove") that can
+run the tests in a test harness; the test harness is `prove` unless otherwise
+configured. TAP output is also very human-readable all by itself, so having
+a test harness isn't really required.
+