Test code that involve adding filters or actions gets noisy because you have to manually remove them at the end of each test, or else the hook spills over into other tests. This also makes it error prone because it's easy to forget to remove the hook.

Add helper methods to Timber_UnitTestCase for temporarily adding filters or actions. These methods should store a reference to the params they were passed. In tearDown(), loop through all the stored references of added filters/actions and remove them using the same params.