diff --git a/tests/utils.py b/tests/utils.py
index 47dd213530..909064651d 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -9,13 +9,13 @@
 @asynccontextmanager
 async def run_server(config: Config, sockets=None):
     server = Server(config=config)
-    cancel_handle = asyncio.ensure_future(server.serve(sockets=sockets))
+    task = asyncio.create_task(server.serve(sockets=sockets))
     await asyncio.sleep(0.1)
     try:
         yield server
     finally:
         await server.shutdown()
-        cancel_handle.cancel()
+        task.cancel()
 
 
 @contextmanager