Use descendant invalidation set for :any-link pseudo class.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS getComputedStyle(link).backgroundColor is red
PASS internals.updateStyleAndReturnAffectedElementCount() is 1
PASS getComputedStyle(link).backgroundColor is green
PASS successfullyParsed is true
TEST COMPLETE
This link should have a green background.