Added test about error filterwarnings

        output = force_text(self.outputs[0].getvalue())

        self.assertFalse('Foo Deprecated' in output)

    @override_settings(DEBUG=True)

    def test_error_filter_still_raises(self):

        with warnings.catch_warnings():

            warnings.filterwarnings(

                'error',

                category=RemovedInNextVersionWarning

            )

            with self.assertRaises(RemovedInNextVersionWarning):

                warnings.warn('Foo Deprecated', RemovedInNextVersionWarning)

class CallbackFilterTest(TestCase):

    def test_sense(self):