diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 116bff8..a40fcb6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         python: ['3.7', '3.8']
         spawn_backend: ['trio', 'mp']
     steps: