diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index f171e5a1..c33ba83b 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -11,10 +11,11 @@ on:
   # Run tests on pull requests
 jobs:
   tests:
-    runs-on: ubuntu-latest
     strategy:
       matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ["3.9", "3.12"]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}