diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b071056c..e185c05a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,8 +1,7 @@
 name: Build and test GAM
 
 on:
-  push:
-    branches: [ master ]
+  on: [push, pull_request]
   schedule:
     - cron: '37 22 * * *'