Semantics of <link rel=match> together with <link rel=mismatch>

Suppose you have a test that contains:

  <link rel="match" href="test-ref.html">
  <link rel="mismatch" href="test-notref.html">

Does the test pass if it matches test-ref.html *or* doesn't match
test-notref.html?  Or does it only pass if it matches test-ref.html
*and* doesn't match test-notref.html?  The wiki page doesn't seem
clear:

  http://wiki.csswg.org/test/format#reference-links