le&gt;
.test {
  writing-mode: vertical-rl;
  font-family: TCU-test;
}
.tcy {
  text-combine-upright: all;
  text-emphasis: sesame;
}
&lt;/style&gt;

&lt;p&gt;&lt;span class="tcy"&gt;AB&lt;/span&gt;&lt;/p&gt;</code></pre>
</figure>
<p>This will make the test reftestable.
<figure>
<img src="img/figure-over_and_under-pass.svg" width="300">
<img src="img/figure-over_and_under-fail.svg" width="300">
<figcaption>Conforming user agents apply text-emphasis as if the content inside <code>&lt;span class="tcy"&gt;</c