jQuery remove all list items from an unordered list

$('input').click(function() {
  $('ul').empty()
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul>
  <li>test</li>
  <li>test</li>
</ul>

<input type="button" value="click me" />