diff --git a/tests/appservice/test_appservice.py b/tests/appservice/test_appservice.py
index 8a8f5c61dd..b7ab97173f 100644
--- a/tests/appservice/test_appservice.py
+++ b/tests/appservice/test_appservice.py
@@ -92,7 +92,8 @@ class ApplicationServiceTestCase(unittest.TestCase):
         self.assertTrue(
             (
                 yield defer.ensureDeferred(
-                    self.service.is_interested_in_event(self.event)
+                    # We need to provide the store here in order to carry out room checks
+                    self.service.is_interested_in_event(self.event, self.store)
                 )
             )
         )