diff --git a/Lib/test/test_dict.py b/Lib/test/test_dict.py
index d1f31923708..a38895945ed 100644
--- a/Lib/test/test_dict.py
+++ b/Lib/test/test_dict.py
@@ -45,6 +45,9 @@ def test_keys(self):
         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)