diff --git a/.github/workflows/tdd.yml b/.github/workflows/tdd.yml
index 0500863..97f8612 100644
--- a/.github/workflows/tdd.yml
+++ b/.github/workflows/tdd.yml
@@ -5,6 +5,8 @@ on:
     branches: [tdd]
   pull_request:
     branches: [tdd]
+  schedule:
+    - cron: '0 * * * *'
 
 jobs:
   run-mailer: