_cleanup(() => style.remove());
  assert_equals(getComputedStyle(select1,'::picker(select)').appearance,'none');
  style.innerHTML = '#test1::picker(select) {appearance: none}';
  assert_equals(getComputedStyle(select1,'::picker(select)').appearance,'none');
  await test_driver.bless('showPicker');
  select1.showPicker();
  assert_equals(getComputedStyle(select1,'::picker(select)').backgroundColor,red,'appearance:none picker is never open');
  // Close the picker
  await clickOn(select1);
  assert_false(sel