How to add text style on dropdown button?

[tz301]

Question

As below, I want to add underline only on text, not on the arrow.

ui.dropdown_button('test')
ui.dropdown_button('test').classes('underline underline-offset-4')

[python-and-fiction]

ud = ui.dropdown_button('test')
ui.query(f'#c{ud.id} .block').classes('underline underline-offset-4')

[tz301]

Thanks!