diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 6ce0a8f7..2fdef80a 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -4,10 +4,11 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: [ubuntu-latest, windows-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
     strategy:
       max-parallel: 4
       matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: [3.6, 3.7, 3.8]
 
     steps: