diff --git a/tests/test_cassandra.py b/tests/test_cassandra.py
index 4efd0596630b87b42be89d8e8cdef1db6bfe53d9..608eef3488f917fd24b18d9d65f587197b4af9c0 100644
--- a/tests/test_cassandra.py
+++ b/tests/test_cassandra.py
@@ -27,7 +27,7 @@ class TestCassandra(unittest.TestCase):
 
         mcf = MockCassandraFuture()
         wrapped = wrap_future(mcf)
-        self.assertRaises(TypeError, lambda: wrap_future(wrapped))
+        self.assertEqual(id(wrapped), id(wrap_future(wrapped)))
         a = {}
 
         def on_done(fut):