LayoutTests/fast/ruby/sideways-lr-incorrect-position.html

<style>
div {
  writing-mode: sideways-lr;
  font-size: 20px;
  font-family: Ahem;
}</style>
<div><ruby>base<rt>annotation</rt></ruby></div>
<div><ruby style="ruby-position: under">base<rt>annotation</rt></ruby></div>
<div style="border: 5px solid black"><ruby style="ruby-position: under">base<rt>annotation</rt></ruby></div>