diff --git a/tests/resources/test_kms_key.py b/tests/resources/test_kms_key.py
index 9257324..44db252 100644
--- a/tests/resources/test_kms_key.py
+++ b/tests/resources/test_kms_key.py
@@ -184,4 +184,4 @@ def test_kms_policy_documents(kms_key):
 
 
 def test_kms_no_policy(kms_key_no_policy):
-    assert kms_key_no_policy.Properties.KeyPolicy == None
+    assert kms_key_no_policy.Properties.KeyPolicy is None