new_contents: import cv2
  from plantcv.plantcv import laplace_filter
  
  
  def test_laplace_filter(test_data):
      # Read in test data
      img = cv2.imread(test_data.small_gray_img, -1)
      lp_img = laplace_filter(gray_img=img, ksize=1, scale=1)
      # Assert that the output image has the dimensions of the input image
      assert img.shape == lp_img.shape
  
subject: Add laplace_filter tests module