diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fb9b941d..ac506740 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,11 +1,18 @@
 name: Tests
-on: [push]
+on:
+  push:
+    branches:
+      - master
+      - v*
+  pull_request:
+    branches:
+      - master
 
 jobs:
   formatting:
     name: Formatting
-
     runs-on: ubuntu-latest
+
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1