test_v_profile stderr

/usr/lib/python2.7/xml/etree/ElementTree.py:1638: DeprecationWarning: This method of XMLParser is deprecated.  Define doctype() method on the TreeBuilder target.
  DeprecationWarning,
..F.
======================================================================
FAIL: testOutput (__main__.TestProfiling)
Test correctness of output
----------------------------------------------------------------------
Traceback (most recent call last):
  File "vector/v.profile/testsuite/test_v_profile.py", line 114, in testOutput
    self.assertLooksLike(reference=output_full, actual=vpro.outputs.stdout)
  File "etc/python/grass/gunittest/case.py", line 188, in assertLooksLike
    'actual argument is not a string'))
AssertionError: actual argument is not a string 
False is not true

----------------------------------------------------------------------
Ran 4 tests in 0.995s
FAILED (failures=1)