diff --git a/fulfillment_test.py b/fulfillment_test.py
index 9557acd..5085ca8 100644
--- a/fulfillment_test.py
+++ b/fulfillment_test.py
@@ -213,7 +213,9 @@ def test_unknown_customer_no_address(self) -> None:
 
     # Verify no destinations injected
     method = updated_checkout.fulfillment.root.methods[0]
-    self.assertIsNone(method.destinations)
+    self.assertTrue(
+      method.destinations is None or len(method.destinations) == 0
+    )
 
   def test_known_customer_no_address(self) -> None:
     """Test that a known customer with no stored address gets no injection."""
@@ -230,7 +232,9 @@ def test_known_customer_no_address(self) -> None:
     updated_checkout = checkout.Checkout(**response_json)
 
     method = updated_checkout.fulfillment.root.methods[0]
-    self.assertIsNone(method.destinations)
+    self.assertTrue(
+      method.destinations is None or len(method.destinations) == 0
+    )
 
   def test_known_customer_one_address(self) -> None:
     """Test that a known customer with an address gets it injected."""