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-rw-r--r--jsonschema/tests/test_format.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/jsonschema/tests/test_format.py b/jsonschema/tests/test_format.py
index f622265..5dd06cf 100644
--- a/jsonschema/tests/test_format.py
+++ b/jsonschema/tests/test_format.py
@@ -29,7 +29,8 @@ class TestFormatChecker(TestCase):
def test_it_can_register_cls_checkers(self):
original = dict(FormatChecker.checkers)
self.addCleanup(FormatChecker.checkers.pop, "boom")
- FormatChecker.cls_checks("boom")(boom)
+ with self.assertWarns(DeprecationWarning):
+ FormatChecker.cls_checks("boom")(boom)
self.assertEqual(
FormatChecker.checkers,
dict(original, boom=(boom, ())),