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chromium/third_party/blink/web_tests/external/wpt/html/rendering/replaced-elements/the-select-element/select-1-block-size-001.html 

<!doctype html>
<title>Select block size when line-height is specified</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:[email protected]">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1571764">
<link rel="match" href="select-1-block-size-001-ref.html">
<style>
select {
  -webkit-appearance: none;
  appearance: none;

  background: black;
  color: black;

  line-height: 100px;
  width: 100px;

  border: 0;
  border-radius: 0;
  padding: 0;
}
</style>
<select></select>
<select><option>A</option></select>