diff --git a/tests/notification/fixtures/services_notification.yml b/tests/notification/fixtures/services_notification.yml
index 7eaa7e81ec..e0a404b12b 100644
--- a/tests/notification/fixtures/services_notification.yml
+++ b/tests/notification/fixtures/services_notification.yml
@@ -23,6 +23,9 @@ services:
     cache.driver:
         synthetic: true
 
+    group_helper:
+        synthetic: true
+
     path_helper:
         synthetic: true