diff --git a/Lib/tkinter/test/support.py b/Lib/tkinter/test/support.py
index 017681f038..067fc71c8f 100644
--- a/Lib/tkinter/test/support.py
+++ b/Lib/tkinter/test/support.py
@@ -22,6 +22,7 @@ class AbstractTkTest:
 
     @classmethod
     def tearDownClass(cls):
+        cls.root.update_idletasks()
         cls.root.destroy()
         cls.root = None
         tkinter._default_root = None