<html>
<head>
<style type="text/css">
@font-face {
  font-family: mplus;
  src: url(../fonts/mplus/mplus-1p-regular-no-OT.ttf);
  /* a copy of M+ with OpenType tables removed, so only legacy 'kern' is present */
}

body {
  text-rendering: optimizeLegibility;
  font-size: 40px;
  font-family: mplus;
}
span {
  font-family: serif;
}
</style>
</head>
<body>
<!-- the ZWNJ characters with font change should prevent kerning at those positions;
     if the testcase looks the same, then kerning failed altogether -->
AVA<span>&zwnj;</span>V<span>&zwnj;</span>A
</body>
</html>