<!--
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<!DOCTYPE html>
<title>CSS Test: Test declaring a variable that consists of a comma-separated font family list with the comma coming from a variable reference.</title>
<link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au">
<link rel="help" href="http://www.w3.org/TR/css-variables-1/#syntax">
<link rel="match" href="variable-declaration-18-ref.html">
<meta name="flags" content="ahem">
<link rel="stylesheet" href="../support/ahem.css" type="text/css">
<style>
body {
  font-family: serif;
}
p {
  font-family: monospace;
  --a: Ahem var(--b) sans-serif;
  --b: ,;
  font-family: var(--a);
}
</style>
<p>This text must be in Ahem.</p>