diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5525b6b..f67dc51 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -55,6 +55,10 @@ jobs:
         python -mpip install wheel
         python -mpip install -r requirements-dev.txt
 
+    - name: Check stubs
+      if: (! startsWith(matrix.python-version, 'pypy-'))
+      run: make mypy PYTHON=python
+
 
   test:
     strategy:
diff --git a/Makefile b/Makefile
index 05f5f1c..b630b67 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,7 @@ test_venv:
 
 .PHONY: mypy
 mypy:
-	$(Q)mypy --strict --no-warn-unused-ignores src
+	$(Q)mypy --strict --no-warn-unused-ignores src test
 
 .PHONY: update
 update: