diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0003760d4..d03da7f0a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -209,7 +209,7 @@ jobs:
         flake8 .
         black ./__app__/ ./tests --check
         isort --profile black ./__app__/ ./tests --check
-        mypy __app__
+        mypy __app__ ./tests
 
         # set a minimum confidence to ignore known false positives
         vulture --min-confidence 61 __app__