_equals(list.getEntries().length, 1);
        const entry = list.getEntries()[0];
        assert_equals(entry.entryType, "layout-shift");
        assert_greater_than_equal(entry.startTime, startTime);
        assert_less_than_equal(entry.startTime, endTime);
        assert_equals(entry.duration, 0.0);
        assert_equals(entry.value, computeExpectedScore(300 * (100 + 60),  60));
        resolve();
      })).observe({'type': 'layout-shift', buffered: true});
    }).observe({type: 'layout-shift'});
    // M