diff --git a/src/spiffworkflow_backend/models/group.py b/src/spiffworkflow_backend/models/group.py
index b0042b51..b1a62c46 100644
--- a/src/spiffworkflow_backend/models/group.py
+++ b/src/spiffworkflow_backend/models/group.py
@@ -8,7 +8,8 @@ from flask_bpmn.models.group import FlaskBpmnGroupModel
 from sqlalchemy.orm import relationship
 
 if TYPE_CHECKING:
-    pass
+    from spiffworkflow_backend.models.user_group_assignment import UserGroupAssignmentModel  # noqa: F401
+    from spiffworkflow_backend.models.user import UserModel  # noqa: F401
 
 
 class GroupModel(FlaskBpmnGroupModel):
diff --git a/src/spiffworkflow_backend/models/task_event.py b/src/spiffworkflow_backend/models/task_event.py
index 7dd47371..3c49cc77 100644
--- a/src/spiffworkflow_backend/models/task_event.py
+++ b/src/spiffworkflow_backend/models/task_event.py
@@ -14,7 +14,7 @@ from sqlalchemy import func
 
 
 if TYPE_CHECKING:
-    from spiffworkflow_backend.models.process_instance import ProcessInstanceModel
+    from spiffworkflow_backend.models.process_instance import ProcessInstanceModel  # noqa: F401
 
 
 class TaskAction(enum.Enum):
@@ -71,7 +71,7 @@ class TaskEventModelSchema(SQLAlchemyAutoSchema):
 class TaskEvent:
     """TaskEvent."""
 
-    def __init__(self, model: TaskEventModel, process_instance: ProcessInstanceModel):
+    def __init__(self, model: TaskEventModel, process_instance: "ProcessInstanceModel"):
         """__init__."""
         self.id = model.id
         self.process_instance = process_instance
diff --git a/src/spiffworkflow_backend/services/error_handling_service.py b/src/spiffworkflow_backend/services/error_handling_service.py
index 710a6b0b..432593d4 100644
--- a/src/spiffworkflow_backend/services/error_handling_service.py
+++ b/src/spiffworkflow_backend/services/error_handling_service.py
@@ -1,11 +1,12 @@
 """Error_handling_service."""
 from flask_bpmn.api.api_error import ApiError
+from spiffworkflow_backend.services.process_instance_processor import ProcessInstanceProcessor
 
 
 class ErrorHandlingService:
     """ErrorHandlingService."""
 
-    def handle_error(self, processor, error):
+    def handle_error(self, processor: ProcessInstanceProcessor, error: ApiError) -> None:
         """Handle_error."""
         print("handle_error")
 
diff --git a/tests/spiffworkflow_backend/unit/test_file.py b/tests/spiffworkflow_backend/unit/test_file.py
index 961468c8..6bd181ff 100644
--- a/tests/spiffworkflow_backend/unit/test_file.py
+++ b/tests/spiffworkflow_backend/unit/test_file.py
@@ -1,4 +1,5 @@
 """Test_file."""
+from datetime import datetime
 from spiffworkflow_backend.models.file import File
 
 
@@ -20,6 +21,6 @@ def create_test_file(type: str, name: str) -> File:
         name=name,
         content_type=type,
         document={},
-        last_modified="Tuesday",
+        last_modified=datetime.now(),
         size=1,
     )