python2.7中的test_ssl.py和test_urllib2.py测试失败

TestSysS.Py

root@yasir:/home/yasir/PYTHON/python2.7-2.7.6/Lib/test# python  python test_ssl.py 
Traceback (most recent call last):
    File "test_ssl.py", line 7, in <module>
      from test.script_helper import assert_python_ok
ImportError: No module named script_helper

测试urllib2.py

root@yasir:/home/yasir/PYTHON/python2.7-2.7.6/Lib/test# python test_urllib2.py 
Traceback (most recent call last):
   File "test_urllib2.py", line 3, in <module>
     from test import test_urllib
ImportError: cannot import name test_urllib

我不知道哪个模块丢失了,所以面对这个错误