✅ Tweak instance ordering for consistency

tests/test_form_default.py

@@ -5,7 +5,6 @@ from starlette.testclient import TestClient
 from typing_extensions import Annotated
 
 app = FastAPI()
-client = TestClient(app)
 
 
 @app.post("/urlencoded")
@@ -21,6 +20,9 @@ async def post_multi_part(
     return {"file": file, "age": age}
 
 
+client = TestClient(app)
+
+
 def test_form_default_url_encoded():
     response = client.post("/urlencoded", data={"age": ""})
     assert response.status_code == 200