<!DOCTYPE html>
<style>
.container {
  vertical-align: top;
}

.emptyBox {
  display: inline-block;
  width: 50px;
  height: 50px;
}
</style>
<p>Test passes if a text below is aligned.</p>
<div class="container">
  <div class="emptyBox"></div>
  <span>This text should</span> be on the same line.
</div>