diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index f991a6230..3d7f3d93d 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -5,15 +5,8 @@ on: [push]
 jobs:
   build:
     runs-on: macos-latest
-    strategy:
-      matrix:
-        ruby: [ '2.6.x', '2.5.x', '2.4.x', '2.3.x' ]
     steps:
     - uses: actions/checkout@master
-    - name: Set up Ruby
-      uses: actions/setup-ruby@v1
-      with:
-        version: ${{ matrix.ruby }}
     - name: Build and test with Rake
       run: |
         gem install minitest