diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index fe7dff6..7895ab6 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -1,5 +1,12 @@
 name: pytest
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - '**'
+      - '!master'
+  pull_request:
+    branches:
+      - 'master'
 jobs:
   tests:
     runs-on: ubuntu-latest