diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 0587df9..3a0ed79 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -1,9 +1,8 @@
 name: Run nightly tests
 
 on:
-  push:
-  pull_request:
-
+  schedule:
+    - cron: '0 0 * * *' # Every day at midnight UTC
 jobs:
   run-tests:
     runs-on: [ubuntu-latest, cloud]