text: import pytest
  
  from ..reverse_lists import reverse_lists
  
  
  @pytest.mark.parametrize('arr_x, expected', [
      ([[1, 2, 3], [4, 5, 6], [7, 8]], [[3, 2, 1], [6, 5, 4], [8, 7]]),
      ([[23, 40, 10, 34],[34, 10, 40, 23]], [[34, 10, 40, 23],[23, 40, 10, 34]])
  ])
  def test_reverse_lists(arr_x, expected):
      actual = reverse_lists(arr_x)
      assert actual == expected
  