diff --git a/django_walletpass/tests/main.py b/django_walletpass/tests/main.py
index d5e659e..5286c34 100644
--- a/django_walletpass/tests/main.py
+++ b/django_walletpass/tests/main.py
@@ -35,8 +35,8 @@ def test_wallet_pass(self):
         instance = builder.write_to_model()
         instance.save()
 
-        self.assertEqual(
-            admin_view.wallet_pass_(instance)[-48:],
+        self.assertContains(
+            admin_view.wallet_pass_(instance),
             "<img src='/static/admin/passbook_icon.svg'/></a>",
         )