diff --git a/app/user_manager.py b/app/user_manager.py
index cf8eac979..e47b2fd4b 100644
--- a/app/user_manager.py
+++ b/app/user_manager.py
@@ -234,6 +234,8 @@ class UserManager():
             - file: The target file path (URL encoded if necessary).
 
             Returns:
+            - 400: If 'file' parameter is missing.
+            - 403: If the requested path is not allowed.
             - 409: If overwrite=false and the file already exists.
             - 200: JSON response with either:
                   - Full file information (if full_info=true)
diff --git a/tests-unit/prompt_server_test/user_manager_test.py b/tests-unit/prompt_server_test/user_manager_test.py
index 91a427263..3db426b8d 100644
--- a/tests-unit/prompt_server_test/user_manager_test.py
+++ b/tests-unit/prompt_server_test/user_manager_test.py
@@ -14,7 +14,7 @@ def user_manager(tmp_path):
     um = UserManager()
     um.get_request_user_filepath = lambda req, file, **kwargs: os.path.join(
         tmp_path, file
-    )
+    ) if file else tmp_path
     return um