diff --git a/tests/test_router_mount.py b/tests/test_router_mount.py
index 9bee074f48..57dbdd3e66 100644
--- a/tests/test_router_mount.py
+++ b/tests/test_router_mount.py
@@ -1,4 +1,4 @@
-from fastapi import FastAPI, APIRouter
+from fastapi import APIRouter, FastAPI
 from fastapi.testclient import TestClient
 
 
@@ -22,4 +22,4 @@ def test_mount_on_router():
     client = TestClient(app)
 
     assert client.get("/api/app").status_code == 200
-    assert client.get("/api/subapi/sub").status_code == 200
\ No newline at end of file
+    assert client.get("/api/subapi/sub").status_code == 200