test_parameter stderr

etc/python/grass/pygrass/modules/interface/parameter.py:29: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
  msg = req % (param.name, param.typedesc, ptype, value, exc.message)
...........E.....
======================================================================
ERROR: test_single_string_file (__main__.TestCheckValueFunction)
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Traceback (most recent call last):
  File "lib/python/pygrass/modules/interface/testsuite/test_parameter.py", line 223, in test_single_string_file
    self.assertTupleEqual((value, value), _check_value(param, value))
  File "etc/python/grass/pygrass/modules/interface/parameter.py", line 77, in _check_value
    check_string(value)
  File "etc/python/grass/pygrass/modules/interface/parameter.py", line 47, in check_string
    raise ValueError(msg % (param.name, type(value), value))
ValueError: The Parameter <name> require a string, <type 'unicode'> instead is provided: u'elev'

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Ran 17 tests in 0.003s
FAILED (errors=1)