diff --git a/docs_src/app_testing/tutorial003.py b/docs_src/app_testing/tutorial003.py
index 90513740e..53d8c894b 100644
--- a/docs_src/app_testing/tutorial003.py
+++ b/docs_src/app_testing/tutorial003.py
@@ -1,4 +1,5 @@
 import warnings
+
 from fastapi import FastAPI
 from fastapi.testclient import TestClient