public function verifyListIsEmpty(): void
    {
        $firstRowValue = $this->adminLists['Content items']->table->getCellValue(1, 1);

        if (
        !($this->adminLists['Content items']->table->getItemCount() === 1 &&
            strpos($firstRowValue, 'No content items.') !== false)
        ) {
            throw new \Exception('"Content items" list is not empty.');
        }
    }