diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index aae295b..1eb25bf 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -12,9 +12,10 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ['3.10']
 
     steps:
@@ -38,4 +39,5 @@ jobs:
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |
+        pip install --user pytest
         pytest