diff --git a/.github/workflows/modal-tests.yml b/.github/workflows/modal-tests.yml
index d989a1ce..827e393e 100644
--- a/.github/workflows/modal-tests.yml
+++ b/.github/workflows/modal-tests.yml
@@ -1,6 +1,7 @@
 name: Modal tests
 
 on:
+  pull_request:
   schedule:
     # Mon/Wed/Fri at 03:39 UTC, see https://crontab.guru/
     - cron: "39 3 * * 1,3,5"