diff --git a/.github/workflows/test_and_deploy.yml b/.github/workflows/test_and_deploy.yml
index a8b4db50..1bc008ad 100644
--- a/.github/workflows/test_and_deploy.yml
+++ b/.github/workflows/test_and_deploy.yml
@@ -51,6 +51,7 @@ jobs:
         shell: sh
       - run: mix deps.get
       - run: mix test
+      - run: mix format --check-formatted
 
   deploy:
     name: Deploy