diff --git a/pyproject.toml b/pyproject.toml
index b43ea7a..226b3b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -76,9 +76,13 @@ source = [
 show_missing = true
 
 [tool.mypy]
+enable_error_code = [
+  "ignore-without-code",
+  "redundant-expr",
+  "truthy-bool",
+]
 mypy_path = "src/"
 namespace_packages = false
-show_error_codes = true
 strict = true
 warn_unreachable = true
 
diff --git a/tests/test_django_watchfiles.py b/tests/test_django_watchfiles.py
index e2a13d7..1c96d72 100644
--- a/tests/test_django_watchfiles.py
+++ b/tests/test_django_watchfiles.py
@@ -6,4 +6,4 @@ def test_import():
 
     import django_watchfiles
 
-    assert django_watchfiles
+    assert django_watchfiles  # type: ignore [truthy-bool]