diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4595c4e..cae8cc0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,5 +23,9 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install tox tox-gh-actions
+
+    - name: Pre-commit
+      uses: pre-commit/action@v3.0.0
+
     - name: Test with tox
       run: tox
diff --git a/.mypy.ini b/.mypy.ini
index 629535a..19db5ef 100644
--- a/.mypy.ini
+++ b/.mypy.ini
@@ -9,13 +9,13 @@ strict_equality = True
 extra_checks = True
 
 # Strongly recommend enabling this one as soon as you can
-; check_untyped_defs = True
+check_untyped_defs = True
 
 # These shouldn't be too much additional work, but may be tricky to
 # get passing if you use a lot of untyped libraries
 disallow_subclassing_any = True
 disallow_untyped_decorators = True
-; disallow_any_generics = True
+disallow_any_generics = True
 
 # These next few are various gradations of forcing use of type annotations
 ; disallow_untyped_calls = True