test_r_mask 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: test_mask (__main__.TestRMask)
Mask test
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Traceback (most recent call last):
  File "scripts/r.mask/testsuite/test_r_mask.py", line 39, in test_mask
    precision=5)
  File "etc/python/grass/gunittest/case.py", line 278, in assertRasterFitsUnivar
    precision=precision)
  File "etc/python/grass/gunittest/case.py", line 254, in assertModuleKeyValue
    self.fail(self._formatMessage(msg, stdMsg))
AssertionError: r.univar map=elevation percentile=90.0 separator== -g difference:
mismatch values (key, reference, actual): [('max', 134.87, 3116.93530273438), ('min', 56.8785, 68.2799987792969)]
command: r.univar map=elevation percentile=90.0 separator== -g {'map': 'elevation', 'separator': '=', 'flags': 'g'}

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Ran 1 test in 8.322s
FAILED (failures=1)