p_func(entries => {
        assert_equals(entries.getEntries().length, 1, 'There should be a single entry.');
        const e = entries.getEntries()[0];
        const item = taoCombinations[observedCount];
        const url = getURL(item);
        const options = item.passes ? [] : ['renderTimeIs0'];
        checkImage(e, url, 'image', sizes[observedCount], beforeLoad, options);
        observedCount++;
        if (observedCount === taoCombinations.length) {
            t.done();
        } else {
          