diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d5c9ce249..1ec7610b4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         python: ['3.9']
         spawn_backend: ['trio', 'mp']