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-rw-r--r--Lib/test/test_dict.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/test/test_dict.py b/Lib/test/test_dict.py
index d1f3192370..a38895945e 100644
--- a/Lib/test/test_dict.py
+++ b/Lib/test/test_dict.py
@@ -45,6 +45,9 @@ class DictTest(unittest.TestCase):
self.assertEqual(set(d.keys()), set())
d = {'a': 1, 'b': 2}
k = d.keys()
+ self.assertEqual(set(k), {'a', 'b'})
+ self.assertIn('a', k)
+ self.assertIn('b', k)
self.assertIn('a', d)
self.assertIn('b', d)
self.assertRaises(TypeError, d.keys, None)