code: def test_quantize_dither_diff():
      image = hopper()
      with Image.open("Tests/images/caption_6_33_22.png") as palette:
          palette = palette.convert("P")
  
      dither = image.quantize(dither=1, palette=palette)
      nodither = image.quantize(dither=0, palette=palette)
  
      assert dither.tobytes() != nodither.tobytes()
  
file_path: pillow-simd/Tests/test_image_quantize.py
imports: import pytest
  from PIL import Image
  from .helper import assert_image_similar, hopper, is_ppc64le
label_desc: Use image node_id 7 for calling a global function with example usage: test_quantize_dither_diff() without return types