diff --git a/test/test_son.py b/test/test_son.py
index 18d171621..78b928427 100644
--- a/test/test_son.py
+++ b/test/test_son.py
@@ -169,7 +169,7 @@ class TestSON(unittest.TestCase):
         has_key and __contains__
         """
         test_son = SON([(1, 100), (2, 200), (3, 300)])
-        self.assertIn(1, test_son)
+        self.assertTrue(1 in test_son)
         self.assertTrue(2 in test_son, "in failed")
         self.assertFalse(22 in test_son, "in succeeded when it shouldn't")
         self.assertTrue(test_son.has_key(2), "has_key failed")
@@ -181,7 +181,7 @@ class TestSON(unittest.TestCase):
         """
         test_son = SON([(1, 100), (2, 200), (3, 300)])
         test_son.clear()
-        self.assertNotIn(1, test_son)
+        self.assertFalse(1 in test_son)
         self.assertEqual(0, len(test_son))
         self.assertEqual(0, len(test_son.keys()))
         self.assertEqual({}, test_son.to_dict())