diff --git a/moto/server.py b/moto/server.py
index 051e81a33..e02f07312 100644
--- a/moto/server.py
+++ b/moto/server.py
@@ -7,8 +7,9 @@ from typing import Any, List, Optional
 
 from werkzeug.serving import run_simple
 
-from moto.moto_server.threaded_moto_server import (  # noqa # pylint: disable=unused-import
-    ThreadedMotoServer,
+# Expose ThreadedMotoServer as a public symbol according to PEP-561
+from moto.moto_server.threaded_moto_server import (  # pylint: disable=unused-import
+    ThreadedMotoServer as ThreadedMotoServer,
 )
 from moto.moto_server.werkzeug_app import (
     DomainDispatcherApplication,