diff --git a/backend/src/seed/seed-db.js b/backend/src/seed/seed-db.js
index 8f693cfd3..6d32b64df 100644
--- a/backend/src/seed/seed-db.js
+++ b/backend/src/seed/seed-db.js
@@ -294,9 +294,10 @@ import Factory from './factories'
       }),
     ])
 
-    const mention1 = 'Hey <a class="mention" href="/profile/u3">@jenny-rostock</a>, what\'s up?'
+    const mention1 =
+      'Hey <a class="mention" data-mention-id="u3" href="/profile/u3">@jenny-rostock</a>, what\'s up?'
     const mention2 =
-      'Hey <a class="mention" href="/profile/u3">@jenny-rostock</a>, here is another notification for you!'
+      'Hey <a class="mention" data-mention-id="u3" href="/profile/u3">@jenny-rostock</a>, here is another notification for you!'
 
     await Promise.all([
       asAdmin.create('Post', {