diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index c7b2f60..6667f83 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -2,7 +2,13 @@ name: Tests
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
-on: [push]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 permissions:
   contents: read