diff --git a/tests/test_normalize.py b/tests/test_normalize.py
index 6efc5d1..4d6cc64 100644
--- a/tests/test_normalize.py
+++ b/tests/test_normalize.py
@@ -141,7 +141,7 @@ def test_normalize_integers(self):
 
         """
         ref = [1, 2, 3, 4]
-        with self.assertRaises(AttributeError):
+        with self.assertRaises(TypeError):
             normalize(ref)