Content Security Policy: The report URI (about:blank) should be an HTTP or HTTPS URI.
Content Security Policy: The page’s settings observed the loading of a resource at https://openspeedtest.com/service-worker.js (“worker-src”). A CSP report is being sent.

<script type="text/javascript">jQuery(document).ready(function($){
    $('#button').click(function(){ 
        if(!$('#iframe').length) {
                $('#iframeHolder').html('<iframe id="iframe" src="https://openspeedtest.com/Get-widget.php" width="700" height="450"></iframe>');
        }
    });   
});
</script>
<button id="button">Speed Test Here</button>
<div id="iframeHolder"></div>

<script type="text/javascript">
  $(document).on('ready pjax:scriptcomplete',function(){
    var buttonText1 = 'Speed Test Here';
    var buttonText2 = 'Hide Speed Test';
 
    $('#speedTestButton').click(function(){ 
      if(!$('#iframeHolder').is(':visible')) {
          $('#iframeHolder').fadeIn(300, function(e) {
            $('#speedTestButton').text(buttonText2);
          });
      }
      else {
          $('#iframeHolder').fadeOut(300, function(e) {
            $('#speedTestButton').text(buttonText1);
          });
      }
    });   
  });
</script>
<button id="speedTestButton" type="button">Speed Test Here</button>
<div id="iframeHolder" style="display: none;">
  <iframe id="iframe" src="https://openspeedtest.com/Get-widget.php" width="700" height="450"></iframe>
</div>