diff --git a/test.py b/test.py
index 7cab03b..6190a8e 100644
--- a/test.py
+++ b/test.py
@@ -9,7 +9,7 @@ from pydantic import BaseModel
 
 class BaseResponse(BaseModel):
     code: int = 200
-    msg: str = None
+    msg: str = "success"
 
 
 app = FastAPI()