diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2cc298f..b9fc10c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,5 +1,9 @@
 name: tests
-on: [push]
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
 jobs:
   unit-tests:
     runs-on: ubuntu-latest