diff --git a/nonebot/drivers/fastapi.py b/nonebot/drivers/fastapi.py
index 42e21490..8a19a5c7 100644
--- a/nonebot/drivers/fastapi.py
+++ b/nonebot/drivers/fastapi.py
@@ -184,6 +184,7 @@ class Driver(BaseDriver):
             logger.warning("There's already a reverse websocket connection, "
                            f"<y>{adapter.upper()} Bot {x_self_id}</y> ignored.")
             await ws.close(code=status.WS_1008_POLICY_VIOLATION)
+            return
 
         bot = BotClass(self, "websocket", self.config, x_self_id, websocket=ws)