diff --git a/.github/workflows/github-actions-demo.yml b/.github/workflows/github-actions-demo.yml
index 40cb137b1..82fbd85c2 100644
--- a/.github/workflows/github-actions-demo.yml
+++ b/.github/workflows/github-actions-demo.yml
@@ -9,11 +9,11 @@ jobs:
       fail-fast: false
       matrix:
         std: [98, 11, 14, 17, 20]
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        #os: [ubuntu-latest, macos-latest, windows-latest]
         config: [Debug, Release]
-        
+
     name: "${{ matrix.os}} ${{ matrix.cxx }} C++:${{ matrix.std }}"
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest, macos-latest, windows-latest
 #    env:
 #      CXX: ${{ matrix.cxx }}