diff --git a/src/backend/langflow/api/v1/chat.py b/src/backend/langflow/api/v1/chat.py
index f97c65aff..a7a50a39f 100644
--- a/src/backend/langflow/api/v1/chat.py
+++ b/src/backend/langflow/api/v1/chat.py
@@ -15,7 +15,6 @@ from langflow.graph.graph.base import Graph
 from langflow.services.auth.utils import get_current_active_user, get_current_user
 from loguru import logger
 from langflow.services.getters import get_chat_service, get_session, get_cache_service
-from cachetools import LRUCache
 from sqlmodel import Session
 from langflow.services.chat.manager import ChatService
 from langflow.services.cache.manager import BaseCacheService
diff --git a/src/backend/langflow/api/v1/endpoints.py b/src/backend/langflow/api/v1/endpoints.py
index b08715254..b0fffebda 100644
--- a/src/backend/langflow/api/v1/endpoints.py
+++ b/src/backend/langflow/api/v1/endpoints.py
@@ -117,7 +117,7 @@ async def process_flow(
             if isinstance(result, dict) and "result" in result:
                 task_result = result["result"]
                 session_id = result["session_id"]
-            else:
+            elif hasattr(result, "result") and hasattr(result, "session_id"):
                 task_result = result.result
 
                 session_id = result.session_id
diff --git a/src/backend/langflow/graph/vertex/base.py b/src/backend/langflow/graph/vertex/base.py
index 5f5f8eaa7..3877e59b1 100644
--- a/src/backend/langflow/graph/vertex/base.py
+++ b/src/backend/langflow/graph/vertex/base.py
@@ -37,7 +37,7 @@ class Vertex:
         self.artifacts: Dict[str, Any] = {}
         self.task_id: Optional[str] = None
         self.is_task = is_task
-        self.params = params
+        self.params = params or {}
 
     def reset_params(self):
         for edge in self.edges:
diff --git a/src/backend/langflow/graph/vertex/types.py b/src/backend/langflow/graph/vertex/types.py
index a64324285..7609982a5 100644
--- a/src/backend/langflow/graph/vertex/types.py
+++ b/src/backend/langflow/graph/vertex/types.py
@@ -4,7 +4,6 @@ from typing import Any, Dict, List, Optional, Union
 from langflow.graph.vertex.base import Vertex
 from langflow.graph.utils import flatten_list
 from langflow.interface.utils import extract_input_variables_from_prompt
-from zmq import has
 
 
 class AgentVertex(Vertex):
@@ -127,8 +126,8 @@ class EmbeddingVertex(Vertex):
 class VectorStoreVertex(Vertex):
     def __init__(self, data: Dict, params=None):
         super().__init__(data, base_type="vectorstores")
-        if params:
-            self.params = params
+
+        self.params = params or {}
 
     # VectorStores may contain databse connections
     # so we need to define the __reduce__ method and the __setstate__ method
@@ -264,7 +263,7 @@ class PromptVertex(Vertex):
                 self.params["input_variables"] = list(
                     set(self.params["input_variables"])
                 )
-            else:
+            elif isinstance(self.params, dict):
                 self.params.pop("input_variables", None)
 
             self._build(user_id=user_id)
diff --git a/src/backend/langflow/interface/run.py b/src/backend/langflow/interface/run.py
index 531a3e247..63391204a 100644
--- a/src/backend/langflow/interface/run.py
+++ b/src/backend/langflow/interface/run.py
@@ -1,4 +1,4 @@
-from typing import Any, Dict, Tuple
+from typing import Dict, Tuple
 from langflow.graph import Graph
 from loguru import logger
 
diff --git a/src/backend/langflow/interface/tools/util.py b/src/backend/langflow/interface/tools/util.py
index fc91387ed..8e4f582c1 100644
--- a/src/backend/langflow/interface/tools/util.py
+++ b/src/backend/langflow/interface/tools/util.py
@@ -4,7 +4,6 @@ import textwrap
 from typing import Dict, Union
 
 from langchain.agents.tools import Tool
-from loguru import logger
 
 
 def get_func_tool_params(func, **kwargs) -> Union[Dict, None]:
diff --git a/src/backend/langflow/services/auth/utils.py b/src/backend/langflow/services/auth/utils.py
index b72514798..f88a1cd12 100644
--- a/src/backend/langflow/services/auth/utils.py
+++ b/src/backend/langflow/services/auth/utils.py
@@ -37,13 +37,13 @@ async def api_key_security(
     result: Optional[Union[ApiKey, User]] = None
     if settings_service.auth_settings.AUTO_LOGIN:
         # Get the first user
-        if not settings_manager.auth_settings.SUPERUSER:
+        if not settings_service.auth_settings.SUPERUSER:
             raise HTTPException(
                 status_code=status.HTTP_400_BAD_REQUEST,
                 detail="Missing first superuser credentials",
             )
 
-        result = get_user_by_username(db, settings_manager.auth_settings.SUPERUSER)
+        result = get_user_by_username(db, settings_service.auth_settings.SUPERUSER)
 
     elif not query_param and not header_param:
         raise HTTPException(
@@ -179,9 +179,9 @@ def create_super_user(
 
 
 def create_user_longterm_token(db: Session = Depends(get_session)) -> dict:
-    settings_manager = get_settings_service()
-    username = settings_manager.auth_settings.SUPERUSER
-    password = settings_manager.auth_settings.SUPERUSER_PASSWORD
+    settings_service = get_settings_service()
+    username = settings_service.auth_settings.SUPERUSER
+    password = settings_service.auth_settings.SUPERUSER_PASSWORD
     if not username or not password:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
diff --git a/src/backend/langflow/services/manager.py b/src/backend/langflow/services/manager.py
index 31aeeda60..e74146a20 100644
--- a/src/backend/langflow/services/manager.py
+++ b/src/backend/langflow/services/manager.py
@@ -148,13 +148,6 @@ def reinitialize_services():
     """
     Reinitialize all the services needed.
     """
-    from langflow.services.database import factory as database_factory
-    from langflow.services.cache import factory as cache_factory
-    from langflow.services.chat import factory as chat_factory
-    from langflow.services.settings import factory as settings_factory
-    from langflow.services.session import factory as session_service_factory
-    from langflow.services.auth import factory as auth_factory
-    from langflow.services.task import factory as task_factory
 
     service_manager.update(ServiceType.SETTINGS_SERVICE)
     service_manager.update(ServiceType.DATABASE_SERVICE)
diff --git a/src/backend/langflow/services/session/manager.py b/src/backend/langflow/services/session/manager.py
index e0ddeb0c2..6bdebf6b3 100644
--- a/src/backend/langflow/services/session/manager.py
+++ b/src/backend/langflow/services/session/manager.py
@@ -2,7 +2,6 @@ from typing import TYPE_CHECKING
 from langflow.interface.run import build_sorted_vertices
 from langflow.services.base import Service
 from langflow.services.cache.utils import compute_dict_hash
-from loguru import logger
 from langflow.services.session.utils import session_id_generator
 
 if TYPE_CHECKING:
diff --git a/src/backend/langflow/services/task/backends/anyio.py b/src/backend/langflow/services/task/backends/anyio.py
index 6c833443a..ca91eca19 100644
--- a/src/backend/langflow/services/task/backends/anyio.py
+++ b/src/backend/langflow/services/task/backends/anyio.py
@@ -1,4 +1,4 @@
-from typing import Any, Callable, Tuple
+from typing import Any, Callable, Optional, Tuple
 import anyio
 from langflow.services.task.backends.base import TaskBackend
 from loguru import logger
@@ -39,7 +39,7 @@ class AnyIOBackend(TaskBackend):
 
     async def launch_task(
         self, task_func: Callable[..., Any], *args: Any, **kwargs: Any
-    ) -> Tuple[str, AnyIOTaskResult]:
+    ) -> Tuple[Optional[str], Optional[AnyIOTaskResult]]:
         """
         Launch a new task in an asynchronous manner.
 
diff --git a/src/backend/langflow/services/task/backends/celery.py b/src/backend/langflow/services/task/backends/celery.py
index f4f81b9cc..5b0a035ef 100644
--- a/src/backend/langflow/services/task/backends/celery.py
+++ b/src/backend/langflow/services/task/backends/celery.py
@@ -1,5 +1,5 @@
 from typing import Any, Callable
-from celery.result import AsyncResult
+from celery.result import AsyncResult  # type: ignore
 from langflow.services.task.backends.base import TaskBackend
 from langflow.worker import celery_app
 
@@ -10,9 +10,9 @@ class CeleryBackend(TaskBackend):
 
     def launch_task(
         self, task_func: Callable[..., Any], *args: Any, **kwargs: Any
-    ) -> str:
+    ) -> tuple[str, AsyncResult]:
         # I need to type the delay method to make it easier
-        from celery import Task
+        from celery import Task  # type: ignore
 
         if not hasattr(task_func, "delay"):
             raise ValueError(f"Task function {task_func} does not have a delay method")
diff --git a/src/backend/langflow/services/utils.py b/src/backend/langflow/services/utils.py
index 940ebc068..02d9816f5 100644
--- a/src/backend/langflow/services/utils.py
+++ b/src/backend/langflow/services/utils.py
@@ -1,4 +1,3 @@
-from langflow.services.auth import service
 from langflow.services.auth.utils import create_super_user
 from langflow.services.database.utils import initialize_database
 from langflow.services.manager import service_manager
@@ -147,7 +146,7 @@ def initialize_services():
     # Test cache connection
     service_manager.get(ServiceType.CACHE_SERVICE)
     # Test database connection
-    db_service = service_manager.get(ServiceType.DATABASE_SERVICE)
+    service_manager.get(ServiceType.DATABASE_SERVICE)
     # Setup the superuser
     initialize_database()
     session = next(get_session())
diff --git a/tests/conftest.py b/tests/conftest.py
index 90622aeee..d6e25addf 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -10,7 +10,7 @@ from langflow.services.database.models.flow.flow import Flow, FlowCreate
 from langflow.services.database.models.user.user import User, UserCreate
 import orjson
 from langflow.services.database.utils import session_getter
-from langflow.services.getters import get_db_service, get_session
+from langflow.services.getters import get_db_service
 import pytest
 from fastapi.testclient import TestClient
 from httpx import AsyncClient
@@ -88,10 +88,7 @@ def setup_env(monkeypatch):
 @pytest.fixture(name="distributed_client")
 def distributed_client_fixture(session: Session, monkeypatch, distributed_env):
     # Here we load the .env from ../deploy/.env
-    from dotenv import load_dotenv
-    from langflow.services.task import manager
     from langflow.core import celery_app
-    from langflow.services.manager import reinitialize_services, initialize_services
 
     db_dir = tempfile.mkdtemp()
     db_path = Path(db_dir) / "test.db"
diff --git a/tests/test_graph.py b/tests/test_graph.py
index f88d89a1b..fdb249eda 100644
--- a/tests/test_graph.py
+++ b/tests/test_graph.py
@@ -3,7 +3,6 @@ import os
 from pathlib import Path
 import pickle
 from typing import Type, Union
-from langflow import graph
 from langflow.graph.edge.base import Edge
 from langflow.graph.vertex.base import Vertex
 from langchain.agents import AgentExecutor
@@ -12,11 +11,9 @@ from langchain.chains.base import Chain
 from langchain.llms.fake import FakeListLLM
 from langflow.graph import Graph
 from langflow.graph.vertex.types import (
-    AgentVertex,
     FileToolVertex,
     LLMVertex,
     ToolkitVertex,
-    VectorStoreVertex,
 )
 from langflow.processing.process import get_result_and_thought
 from langflow.utils.payload import get_root_node
diff --git a/tests/test_setup_superuser.py b/tests/test_setup_superuser.py
index af048140a..6cf4b3a3a 100644
--- a/tests/test_setup_superuser.py
+++ b/tests/test_setup_superuser.py
@@ -1,4 +1,3 @@
-from unittest import mock
 from unittest.mock import patch, Mock, MagicMock, call
 from langflow.services.database.models.user.user import User
 from langflow.services.settings.constants import (
@@ -6,7 +5,6 @@ from langflow.services.settings.constants import (
     DEFAULT_SUPERUSER_PASSWORD,
 )
 from langflow.services.utils import (
-    initialize_settings_service,
     setup_superuser,
     teardown_superuser,
 )