diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 61eb54d..b773fdd 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -2,7 +2,11 @@
 # yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: PHPUnit
 
-on: [ push, pull_request ]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   build-test: