diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3909433..75d4ccd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,8 +11,11 @@ on:
 
 jobs:
   ci:
-    runs-on: ubuntu-latest
-    timeout-minutes: 7
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+    timeout-minutes: 4
     steps:
     - name: Checkout
       uses: actions/checkout@v1