diff --git a/stdlib/tkinter/__init__.pyi b/stdlib/tkinter/__init__.pyi
index 187ea5ca2..0955992d2 100644
--- a/stdlib/tkinter/__init__.pyi
+++ b/stdlib/tkinter/__init__.pyi
@@ -3576,3 +3576,5 @@ class PanedWindow(Widget):
     def paneconfigure(self, tagOrId, cnf: Any | None = ..., **kw): ...
     paneconfig: Any
     def panes(self): ...
+
+def _test() -> None: ...