diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1b0d654..4c3c109 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,10 @@ on:
 jobs:
   test:
     name: 'test ${{ matrix.os }}'
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/action.yml b/action.yml
index 975f649..a532b48 100644
--- a/action.yml
+++ b/action.yml
@@ -15,3 +15,7 @@ runs:
         sudo apt-get update
         sudo apt-get install deb-s3
       shell: bash
+      if: runner.os == 'Linux'
+    - run: gem install deb-s3
+      shell: bash
+      if: runner.os == 'macOS'