diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a4952ef..b8e5e98 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,5 +1,11 @@
 name: Python package
-on: [push]
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -25,4 +31,4 @@ jobs:
           ruff --format=github --target-version=py37 .
       - name: Test with pytest
         run: |
-          python -m pytest
\ No newline at end of file
+          python -m pytest