Unittest failure for python 2.6

Running tests for stack:2.0.6 service:HBASE
Process Process-27:
Traceback (most recent call last):
  File "/usr/lib64/python2.6/multiprocessing/process.py", line 232, in _bootstrap
    self.run()
  File "/usr/lib64/python2.6/multiprocessing/process.py", line 88, in run
    self._target(*self._args, **self._kwargs)
  File "/home/user/ambari/ambari-server/src/test/python/unitTests.py", line 106, in stack_test_executor
    modules]
  File "/usr/lib64/python2.6/unittest.py", line 575, in loadTestsFromName
    module = __import__('.'.join(parts_copy))
  File "/home/user/ambari/ambari-server/src/test/python/stacks/2.0.6/HBASE/test_phoenix_queryserver.py", line 24, in <module>
    from unittest import skip
ImportError: cannot import name skip