diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a84c248..d4ddb7a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ on:
 
 jobs:
   setup:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     env:
       MIX_ENV: test
       # The hostname used to communicate with the Redis service container