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-rw-r--r--Lib/test/test_set.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index c33461d..3203d51 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -35,6 +35,8 @@ class TestJointOps(unittest.TestCase):
for c in self.letters:
self.assertEqual(c in self.s, c in self.d)
self.assertRaises(TypeError, self.s.__contains__, [[]])
+ s = self.thetype([frozenset(self.letters)])
+ self.assert_(self.thetype(self.letters) in s)
def test_copy(self):
dup = self.s.copy()