test_dis is failing on some buildbots:

http://buildbot.python.org/all/builders/AMD64 Ubuntu LTS 3.x/builds/1674/steps/test/logs/stdio

Re-running test 'test_dis' in verbose mode
test test_dis crashed -- Traceback (most recent call last):
  File "/opt/python/3.x.langa-ubuntu/build/Lib/test/regrtest.py", line 1294, in runtest_inner
    the_module = importlib.import_module(abstest)
  File "/opt/python/3.x.langa-ubuntu/build/Lib/importlib/__init__.py", line 92, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1603, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1584, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1551, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 591, in _check_name_wrapper
  File "<frozen importlib._bootstrap>", line 1053, in load_module
  File "<frozen importlib._bootstrap>", line 1034, in load_module
  File "<frozen importlib._bootstrap>", line 567, in module_for_loader_wrapper
  File "<frozen importlib._bootstrap>", line 901, in _load_module
  File "<frozen importlib._bootstrap>", line 297, in _call_with_frames_removed
  File "/opt/python/3.x.langa-ubuntu/build/Lib/test/test_dis.py", line 4, in <module>
    from test.bytecode_helper import BytecodeTestCase
ImportError: No module named 'test.bytecode_helper'