'][aria-label] with alternating case role and illegal fallback role, has region role" aria-label="x" data-expectedrole="region" class="ex">x</div>

  <div role="BUTTON LINK" data-testname="div[role='BUTTON LINK'] with tabindex=0, has button role" aria-label="x" tabindex="0" data-expectedrole="button" class="ex">x</div>
  <div role="ReGiOn group" data-testname="div[role='ReGiOn group'] without accname, has group role" data-expectedrole="group" class="ex">x</div>
  <div role="ReGiOn group" data-testname="div[