diff --git a/.github/workflows/CPUTests.yml b/.github/workflows/CPUTests.yml
index 6ce5efa9b..03876616a 100644
--- a/.github/workflows/CPUTests.yml
+++ b/.github/workflows/CPUTests.yml
@@ -1,9 +1,9 @@
 name: Linter
 
 on:
+  pull_request:
   push:
-    branches:
-      - '**'
+    branches: [ "main" ]
 
 jobs:
   cpu: