diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index b27883a..b3f6b8b 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -5,10 +5,11 @@ on: [push, pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         python-version: ['3.6', '3.7', '3.8', '3.9']
+        os: ['ubuntu-latest', 'windows-latest']
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python