diff --git a/fulfillment_test.py b/fulfillment_test.py
index 8b82f02..97d3870 100644
--- a/fulfillment_test.py
+++ b/fulfillment_test.py
@@ -254,7 +254,8 @@ def test_unknown_customer_no_address(self) -> None:
 
     # Verify no destinations injected
     method = updated_checkout.model_extra["fulfillment"]["methods"][0]
-    self.assertIsNone(method.get("destinations"))
+    destinations = method.get("destinations")
+    self.assertTrue(destinations is None or len(destinations) == 0)
 
   def test_known_customer_no_address(self) -> None:
     """Test that a known customer with no stored address gets no injection."""
@@ -280,7 +281,8 @@ def test_known_customer_no_address(self) -> None:
     updated_checkout = checkout.Checkout(**response_json)
 
     method = updated_checkout.model_extra["fulfillment"]["methods"][0]
-    self.assertIsNone(method.get("destinations"))
+    destinations = method.get("destinations")
+    self.assertTrue(destinations is None or len(destinations) == 0)
 
   def test_known_customer_one_address(self) -> None:
     """Test that a known customer with an address gets it injected."""