diff --git a/fastapi/routing.py b/fastapi/routing.py
index 8f27656d8..b2a8b0188 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -311,6 +311,8 @@ class APIWebSocketRoute(routing.WebSocketRoute):
 
 
 class APIRoute(routing.Route):
+    _route_full_path_format: str  # only for mypy
+
     def __init__(
         self,
         path: str,
diff --git a/tests/test_custom_route_class.py b/tests/test_custom_route_class.py
index 7d8b5f141..f03130aa7 100644
--- a/tests/test_custom_route_class.py
+++ b/tests/test_custom_route_class.py
@@ -2,7 +2,6 @@ import pytest
 from fastapi import APIRouter, FastAPI
 from fastapi.routing import APIRoute
 from fastapi.testclient import TestClient
-from starlette.routing import Route
 
 app = FastAPI()