diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index f2d8cf8..9d022fd 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -37,7 +37,7 @@ jobs:
         path: my-server.js
   test:
     needs: build
-    runs-on: ${{ matrix.os }}
+    runs-on: '${{ matrix.os }}'
     steps:
     - uses: actions/download-artifact@main
       with: