CodePen Embed - CSS Inner Border Issue

<div>
  MURAT
</div>
<div>
  ÖNER
</div>

div {
  background-color: #000;
  color: #fff;
  display: inline-block;
  padding: 5px;
  font-weight: bolder;
}

div:hover {
  background-color:#fff;
  color:#000;
  border: 4px solid #000;
}

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