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-rw-r--r--Lib/test/test_deque.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 17d724c..da00c0d 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -234,7 +234,7 @@ class TestBasic(unittest.TestCase):
d = deque(data[:i])
r = d.reverse()
self.assertEqual(list(d), list(reversed(data[:i])))
- self.assert_(r is None)
+ self.assertIs(r, None)
d.reverse()
self.assertEqual(list(d), data[:i])
self.assertRaises(TypeError, d.reverse, 1) # Arity is zero