diff --git a/Lib/idlelib/zzdummy.py b/Lib/idlelib/zzdummy.py
index 8084499646653d..3c4b1d23b0d379 100644
--- a/Lib/idlelib/zzdummy.py
+++ b/Lib/idlelib/zzdummy.py
@@ -28,7 +28,7 @@ def z_in_event(self, event):
         text = self.text
         text.undo_block_start()
         for line in range(1, text.index('end')):
-            text.insert('%d.0', ztest)
+            text.insert('%d.0', ztext)
         text.undo_block_stop()
         return "break"