The following test fails:

    @Before public void setup() {
        cell = new ListCell<String>();
        model = FXCollections.observableArrayList("Apples", "Oranges", "Pears");
        list = new ListView<String>(model);
    }

    @Test public void replaceItemsWithANull() {
        cell.updateIndex(0);
        cell.updateListView(list);
        list.setItems(null);
        assertNull(cell.getItem());
    }