diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index d602f74b9..3c6a5c8b3 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -6,7 +6,9 @@
 # For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
 
 name: Ruby
-on: [push]
+
+on: [push, pull_request]
+
 jobs:
   check_react_and_ujs:
     strategy: