code: def test_qtables_leak():
      im = hopper("RGB")
  
      standard_l_qtable = [
          int(s)
          for s in """
          16  11  10  16  24  40  51  61
          12  12  14  19  26  58  60  55
          14  13  16  24  40  57  69  56
          14  17  22  29  51  87  80  62
          18  22  37  56  68 109 103  77
          24  35  55  64  81 104 113  92
          49  64  78  87 103 121 120 101
          72  92  95  98 112 100 103  99
          """.split(
              None
          )
      ]
  
      standard_chrominance_qtable = [
          int(s)
          for s in """
          17  18  24  47  99  99  99  99
          18  21  26  66  99  99  99  99
          24  26  56  99  99  99  99  99
          47  66  99  99  99  99  99  99
          99  99  99  99  99  99  99  99
          99  99  99  99  99  99  99  99
          99  99  99  99  99  99  99  99
          99  99  99  99  99  99  99  99
          """.split(
              None
          )
      ]
  
      qtables = [standard_l_qtable, standard_chrominance_qtable]
  
      for _ in range(iterations):
          test_output = BytesIO()
          im.save(test_output, "JPEG", qtables=qtables)
  
imports: from io import BytesIO
  import pytest
  from .helper import hopper, is_win32
label_desc: Use image node_id 1 for calling a global function with example usage: test_qtables_leak() without return types