yTests();
            // for testing, limit to a couple of iterations
            // tests = tests.slice(10, 30);
            // or filter using one of:
            // tests = filterPropertyTests(tests, "background-color color(rgba)");
            // tests = filterPropertyTests(tests, ["background-color color(rgba)", ...]);
            // tests = filterPropertyTests(tests, /^background-color/);

            // general transition-duration
            var duration = '2s';

            runParallelAsyncHarness(