diff --git a/.github/workflows/wpt-nightly.yml b/.github/workflows/wpt-nightly.yml
index 4ac017da8b8..cd38f227e72 100644
--- a/.github/workflows/wpt-nightly.yml
+++ b/.github/workflows/wpt-nightly.yml
@@ -1,7 +1,6 @@
 name: Synchronize WPT Nightly
 
 on:
-  pull_request:
   schedule:
     # Run this job at 00:00 everyday
     - cron: "0 0 * * *"