diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4ee664a..5bb0e95 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,11 +3,11 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-latest
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: [3.6, 3.7, 3.8, 3.9, pypy3]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2