diff --git a/tests/helpers/stubs.py b/tests/helpers/stubs.py
index 173135d73..7b81b8c64 100644
--- a/tests/helpers/stubs.py
+++ b/tests/helpers/stubs.py
@@ -475,7 +475,7 @@ class HostBlockerStub:
     def __init__(self):
         self.blocked_hosts = set()
 
-    def is_blocked(self, url):
+    def is_blocked(self, url, first_party_url=None):
         return url in self.blocked_hosts