diff --git a/.github/workflows/run-all-tests.yml b/.github/workflows/run-all-tests.yml
index 948dce2..3cb4122 100644
--- a/.github/workflows/run-all-tests.yml
+++ b/.github/workflows/run-all-tests.yml
@@ -92,7 +92,7 @@ jobs:
           python -m pip install -e ".[typing, complexity, linting]"
       - name: Typecheck
         run: |
-          mypy pygeoif
+          mypy pygeoif tests
       - name: Linting
         run: |
           flake8 pygeoif