diff --git a/scripts/wk/hw/diags.py b/scripts/wk/hw/diags.py
index b6b25ebf..e4055073 100644
--- a/scripts/wk/hw/diags.py
+++ b/scripts/wk/hw/diags.py
@@ -258,7 +258,7 @@ class State():
 # Functions
 def build_menu(cli_mode=False, quick_mode=False) -> cli.Menu:
   """Build main menu, returns wk.ui.cli.Menu."""
-  menu = cli.Menu(title=None)
+  menu = cli.Menu(title='')
 
   # Add actions, options, etc
   for action in MENU_ACTIONS: