Does Safari on OSX support CSS nesting?

It seems to pass all the tests at

https://codepen.io/bramus/pen/oNdrypM

But everything is yellow in this test:

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Does your browser support CSS Nesting?</title>
  <link rel="icon" type="image/png" href="#">
</head>
<body>
<h1>Does your browser support CSS Nesting?</h1>
<div>
  this should be yellow
  <p>this should be light blue</p>
</div>
<style>
div {
  background: lemonchiffon;
  p {
    background: lightblue;
  }
}
</style>
</body>
</html>
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