diff --git a/.github/workflows/test_build.yml b/.github/workflows/test_build.yml
index a8ddbfe3..6318b9f7 100644
--- a/.github/workflows/test_build.yml
+++ b/.github/workflows/test_build.yml
@@ -1,10 +1,6 @@
 name: Test
 
-on:
-  push:
-    branches:
-      - '*'
-      - '!master'
+on: [pull_request]
 
 jobs:
   build: