  background: red;
  height: 100px;
}
.t{
  grid-column: 1 / span 2;
  border-inline: 50px solid green;
  min-width: 0;
}
.inner{
  display: inline-block;
  width: 100px;
  height: 10px;
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div class="grid">
  <div class="t"><div class="inner"></div></div>
</div>
