diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 890c77f..416199a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,9 @@ name: CI
 on: push
 jobs:
   smoke-test:
-    runs-on: [ubuntu-latest, macos-latest, windows-latest]
+    strategy:
+      matrix:
+        runs-on: [4.x, 6.x, 8.x, 9.x, 10.x, 11.x, 12.x]
     steps:
       - uses: actions/checkout@v1
       - uses: .