diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 1a3b353..7d7d762 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -8,10 +8,11 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["2.7.x", "3.5.x", "3.6.x", "3.7.x", "3.8.x", "3.9.x", "3.10.x", "3.11.x"]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}