diff --git a/.github/workflows/centos-stream8.yml b/.github/workflows/centos-stream8.yml
index f4ac869..8325ccc 100644
--- a/.github/workflows/centos-stream8.yml
+++ b/.github/workflows/centos-stream8.yml
@@ -36,4 +36,5 @@ jobs:
 
 name: Testing
 on:
-  push: {}
+  pull_request:
+    branches: [ master ]