diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
index 05e24ad9d7..6a432c0cf8 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/pythonapp.yml
@@ -1,6 +1,6 @@
 name: Lint
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   flake8-py3: