diff --git a/src/config/app.py b/src/config/app.py
index b92649b0..9624011b 100644
--- a/src/config/app.py
+++ b/src/config/app.py
@@ -171,9 +171,7 @@ class Config(SimpleConfig):
             self.enable_web_search = True
 
         self.valuable_model_provider = [k for k, v in self.model_provider_status.items() if v]
-        assert len(self.valuable_model_provider) > 0, (
-            "No model provider available, please check your `.env` file."
-        )
+        assert len(self.valuable_model_provider) > 0, "No model provider available, please check your `.env` file."
 
     def load(self):
         """根据传入的文件覆盖掉默认配置"""
@@ -223,5 +221,4 @@ class Config(SimpleConfig):
         return json.loads(str(self))
 
 
-
 config = Config()
diff --git a/src/models/chat.py b/src/models/chat.py
index 2bf3478e..aa06c7a3 100644
--- a/src/models/chat.py
+++ b/src/models/chat.py
@@ -5,7 +5,7 @@ from openai import OpenAI
 from tenacity import before_sleep_log, retry, retry_if_exception_type, stop_after_attempt, wait_exponential
 
 from src import config
-from src.utils import get_docker_safe_url, logger
+from src.utils import logger
 
 
 class OpenAIBase:
@@ -79,8 +79,6 @@ class OpenModel(OpenAIBase):
         super().__init__(api_key=api_key, base_url=base_url, model_name=model_name)
 
 
-
-
 class GeneralResponse:
     def __init__(self, content):
         self.content = content
@@ -110,8 +108,6 @@ def select_model(model_provider, model_name=None):
         raise ValueError(f"Model provider {model_provider} load failed, {e} \n {traceback.format_exc()}")
 
 
-
-
 async def test_chat_model_status(provider: str, model_name: str) -> dict:
     """
     测试指定聊天模型的状态
diff --git a/test/api/test_graph_router.py b/test/api/test_graph_router.py
index 34b492db..ccfb8640 100644
--- a/test/api/test_graph_router.py
+++ b/test/api/test_graph_router.py
@@ -15,9 +15,7 @@ async def test_graph_routes_require_auth(test_client):
 
 
 async def test_standard_user_cannot_access_graph_endpoints(test_client, standard_user):
-    response = await test_client.get(
-        "/api/graph/lightrag/databases", headers=standard_user["headers"]
-    )
+    response = await test_client.get("/api/graph/lightrag/databases", headers=standard_user["headers"])
     assert response.status_code == 403
 
 
diff --git a/test/api/test_knowledge_router.py b/test/api/test_knowledge_router.py
index 932153c4..ec95b517 100644
--- a/test/api/test_knowledge_router.py
+++ b/test/api/test_knowledge_router.py
@@ -47,7 +47,5 @@ async def test_knowledge_routes_enforce_permissions(test_client, standard_user,
     forbidden_list = await test_client.get("/api/knowledge/databases", headers=standard_user["headers"])
     assert forbidden_list.status_code == 403
 
-    forbidden_get = await test_client.get(
-        f"/api/knowledge/databases/{db_id}", headers=standard_user["headers"]
-    )
+    forbidden_get = await test_client.get(f"/api/knowledge/databases/{db_id}", headers=standard_user["headers"])
     assert forbidden_get.status_code == 403
diff --git a/test/api/test_system_router.py b/test/api/test_system_router.py
index ae7d19db..65843d23 100644
--- a/test/api/test_system_router.py
+++ b/test/api/test_system_router.py
@@ -25,9 +25,7 @@ async def test_info_endpoint_is_public(test_client):
 
 async def test_config_endpoints_require_admin(test_client, standard_user):
     assert (await test_client.get("/api/system/config")).status_code == 401
-    assert (
-        await test_client.get("/api/system/config", headers=standard_user["headers"])
-    ).status_code == 403
+    assert (await test_client.get("/api/system/config", headers=standard_user["headers"])).status_code == 403
 
 
 async def test_admin_can_fetch_config_and_reload_info(test_client, admin_headers):
diff --git a/test/conftest.py b/test/conftest.py
index e160bca0..a7b41f89 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -139,7 +139,9 @@ async def knowledge_database(test_client: httpx.AsyncClient, admin_headers: dict
         headers=admin_headers,
     )
     if create_response.status_code != 200:
-        pytest.fail(f"Failed to create knowledge database (status={create_response.status_code}): {create_response.text}")
+        pytest.fail(
+            f"Failed to create knowledge database (status={create_response.status_code}): {create_response.text}"
+        )
 
     db_payload = create_response.json()
     db_id = db_payload["db_id"]