diff --git a/.github/workflows/use-action-macos.yaml b/.github/workflows/use-action-macos.yaml
deleted file mode 100644
index 06a0129..0000000
--- a/.github/workflows/use-action-macos.yaml
+++ /dev/null
@@ -1,35 +0,0 @@
-name: Use Action (macOS)
-
-on:
-  push:
-    branches: ['main']
-
-jobs:
-  use-action:
-    name: Use Action
-    runs-on: macos-latest
-    steps:
-      - uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-      - uses: actions/checkout@v2
-
-      # Minimal publish
-      - uses: imjasonh/setup-ko@main
-      - run: ko publish --bare ./
-
-      # Install an old release.
-      - uses: imjasonh/setup-ko@main
-        with:
-          version: v0.8.0
-      - name: Check installed version
-        run: ko version | grep 0.8.0
-
-      # Install from tip
-      - uses: imjasonh/setup-ko@v0.1
-        with:
-          version: tip
-      - name: Check installed version (tip)
-        run: |
-          sudo rm /usr/local/bin/ko # Uninstall previous versions.
-          ko version
diff --git a/.github/workflows/use-action.yaml b/.github/workflows/use-action.yaml
index b81be84..2ec76dd 100644
--- a/.github/workflows/use-action.yaml
+++ b/.github/workflows/use-action.yaml
@@ -7,7 +7,11 @@ on:
 jobs:
   use-action:
     name: Use Action
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest]
+    runs-on: ${{ matrix.platform }}
+
     steps:
       - uses: actions/setup-go@v2
         with:
@@ -15,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
 
       # Minimal publish
-      - uses: imjasonh/setup-ko@v0.1
+      - uses: imjasonh/setup-ko@main
       - run: ko publish --bare ./
 
       # Install an old release.