Yet another excellent test module by Adrian Howard. It let's you keep you sanity when you start getting lots of tests. The ability to have blocks with separate tests really helps when you have complex setup and lots of tests.It also helps by visually separating the tests.
it's also nice to not have to update the plan miles away but instead close to the modified/added tests.
if you find your test files are cluttered, using this module is definitely the first step to take.