diff --git a/edc_action_item/action_with_notification.py b/edc_action_item/action_with_notification.py
index e46ab78..3a214d8 100644
--- a/edc_action_item/action_with_notification.py
+++ b/edc_action_item/action_with_notification.py
@@ -1,4 +1,4 @@
-from typing import List
+from typing import Type, cast
 
 from django.db import models
 
@@ -12,10 +12,10 @@ class ActionWithNotification(Action):
     support for notifications.
     """
 
-    notification_email_to: List[str] = None
+    notification_email_to: list[str] = None
     notification_display_name: str = None
-    notification_fields: List[str] = None
-    notification_super_cls = ActionItemNotification
+    notification_fields: list[str] = None
+    notification_super_cls: Type[ActionItemNotification] = ActionItemNotification
     notify_on_changed_reference_obj: models.Model = True
     notify_on_close: bool = False
     notify_on_new: bool = False
@@ -23,24 +23,27 @@ class ActionWithNotification(Action):
     notify_on_open: bool = False
 
     @classmethod
-    def notification_cls(cls):
+    def notification_cls(cls) -> Type[ActionItemNotification]:
         """Returns a subclass of ActionItemModelNotification."""
-        return type(
-            f"{cls.__name__}Notification",
-            (cls.notification_super_cls,),
-            dict(
-                name=f"{cls.name}-notification",
-                notification_action_name=cls.name,
-                display_name=(
-                    cls.notification_display_name or f"{cls.display_name} Notification"
+        return cast(
+            Type[ActionItemNotification],
+            type(
+                f"{cls.__name__}Notification",
+                (cls.notification_super_cls,),
+                dict(
+                    name=f"{cls.name}-notification",
+                    notification_action_name=cls.name,
+                    display_name=(
+                        cls.notification_display_name or f"{cls.display_name} Notification"
+                    ),
+                    email_to=cls.notification_email_to,
+                    notification_fields=cls.notification_fields,
+                    model=cls.get_reference_model(),
+                    notify_on_new_and_no_reference_obj=cls.notify_on_new_and_no_reference_obj,
+                    notify_on_new=cls.notify_on_new,
+                    notify_on_open=cls.notify_on_open,
+                    notify_on_close=cls.notify_on_close,
+                    notify_on_changed_reference_obj=cls.notify_on_changed_reference_obj,
                 ),
-                email_to=cls.notification_email_to,
-                notification_fields=cls.notification_fields,
-                model=cls.get_reference_model(),
-                notify_on_new_and_no_reference_obj=cls.notify_on_new_and_no_reference_obj,
-                notify_on_new=cls.notify_on_new,
-                notify_on_open=cls.notify_on_open,
-                notify_on_close=cls.notify_on_close,
-                notify_on_changed_reference_obj=cls.notify_on_changed_reference_obj,
             ),
         )
diff --git a/edc_action_item/site_action_items.py b/edc_action_item/site_action_items.py
index b29d6bd..ad16c31 100644
--- a/edc_action_item/site_action_items.py
+++ b/edc_action_item/site_action_items.py
@@ -169,7 +169,7 @@ def autodiscover(module_name=None, verbose=True):
             except Exception as e:
                 raise SiteActionError(
                     f"{e.__class__.__name__} was raised when loading {module_name}. "
-                    f"Got {e} See {app}.{module_name}"
+                    f'Got "{e}" See {app}.{module_name}'
                 )
 
 
diff --git a/runtests.py b/runtests.py
index 4490837..a20f0f4 100644
--- a/runtests.py
+++ b/runtests.py
@@ -12,6 +12,7 @@
     BASE_DIR=base_dir,
     APP_NAME=app_name,
     ETC_DIR=str(base_dir / app_name / "tests" / "etc"),
+    EMAIL_ENABLED=True,
     SILENCED_SYSTEM_CHECKS=[
         "edc_consent.E001",
         "sites.E101",