diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index c50eb49..19503fc 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -8,24 +8,23 @@
 name: Ruby
 
 on:
-  push:
   pull_request:
 
 jobs:
   test:
 
-    runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.0']
+        os: [ubuntu-latest, macos-latest]
+        ruby-version: ['3.0', '3.1', '3.2', '3.3']
+    runs-on: ${{ matrix.os }}
 
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
     # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
     # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@473e4d8fe5dd94ee328fdfca9f8c9c7afc9dae5e
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically