diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 30f0817..798b5f9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,5 +1,11 @@
 name: unit tests
-on: push
+on:
+  push:
+    branches: 
+      - main
+  pull_request:
+    branches: 
+      - main
 jobs:
   build:
     runs-on: ubuntu-latest