asyncio.test_events: Partially reverting f7643c893587 to stay in sync with tulip codebase

Lib/test/test_asyncio/test_events.py

@@ -448,7 +448,7 @@ class EventLoopTestsMixin:
         listener = socket.socket()
         listener.setblocking(False)
         listener.bind(('127.0.0.1', 0))
-        listener.listen()
+        listener.listen(1)
         client = socket.socket()
         client.connect(listener.getsockname())