pearance,'base-select');
  await clickOn(select2);
  assert_true(select2.matches(':open'),'picker should open when clicked');
  assert_equals(getComputedStyle(select2).appearance,'base-select');
  await clickOn(secondOption); // Choose an option
  assert_false(select2.matches(':open'));
  t.add_cleanup(() => select2.removeAttribute('class'));
  select2.classList.add('pickerswitch');
  await clickOn(select2);
  assert_false(select2.matches(':open'),'picker should get closed when the appearance value changes'