Set default checkboxlist value

Can someone give me example how to have a checkboxlist with default value?

i've tried this, but it's not working

CheckboxList::make('test')
  ->options([
      1 => 1,
      2 => 2,
      3 => 3,
      4 => 4,
  ])->default([2]),

CheckboxList::make('test')
  ->options([
      1 => 1,
      2 => 2,
      3 => 3,
      4 => 4,
  ])->default([2]),