If you're using the @Ignore annotation to disable failing JUnit 4 tests, you might consider using a different technique. By adding the expects=AssertionError.class parameter to the @Test annotation, you can actually assert that the test fails as expected, instead of just ignoring it.
Why would you want to do this? First of all, a failing test will not necessarily continue to fail in the same way if it's disabled. If you've written a test to reproduce a bug, but in the course of fixing it you find yourself blocked, you'll have to disable the test (or delete it) in order to check in. But the test you wrote is useful...it reproduces a known bug! By asserting that the code is broken, rather than simply not checking, you ensure that your test remains valid while other changes are happening in the system.
You also help prevent someone else from adding a new (duplicated) test if they try and fix the bug. If they do, your test will start to fail because the bug is fixed, and the other programmer will be immediately aware of the duplication.
Give it a try!
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