diff --git a/.github/workflows/pep8.yml b/.github/workflows/pep8.yml
index 26bcc20..944bdcb 100644
--- a/.github/workflows/pep8.yml
+++ b/.github/workflows/pep8.yml
@@ -1,7 +1,6 @@
 name: pep8
 
-on:
-  push
+on: [push, pull_request]
 
 jobs:
   test: