diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2c7e079..8da4395 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -29,7 +29,7 @@ jobs:
           - platform: "windows-latest"
             python-version: "3.11"
 
-    runs-on: ${{ matrix.os }}
+    runs-on: ${{ matrix.platform }}
 
     steps:
       - uses: actions/checkout@v2