test_vto3d stderr

/usr/lib/python2.7/xml/etree/ElementTree.py:1627: DeprecationWarning: This method of XMLParser is deprecated.  Define doctype() method on the TreeBuilder target.
  DeprecationWarning,
E
======================================================================
ERROR: setUpClass (__main__.TestVTo3D)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "vector/v.to.3d/testsuite/test_vto3d.py", line 13, in setUpClass
    cls.runModule('g.region', raster='elevation')
  File "etc/python/grass/gunittest/case.py", line 1069, in runModule
    errors=errors)
CalledModuleError: Module run 1 g.region ended with error
Process ended with non-zero return code g.region(raster=['elevation']). See the following errors:
ERROR: Raster map <elevation> not found

See available raster maps:
gmted2010
gmted2010.shade
landsat.blue
landsat.green
landsat.red
lst_2010_01_average_piemonte
lst_2010_02_average_piemonte
lst_2010_03_average_piemonte
lst_2010_04_average_piemonte
lst_2010_05_average_piemonte
lst_2010_06_average_piemonte
lst_2010_07_average_piemonte
lst_2010_08_average_piemonte
lst_2010_09_average_piemonte
lst_2010_10_average_piemonte
lst_2010_11_average_piemonte
lst_2010_12_average_piemonte
orbassano_orto.blue
orbassano_orto.green
orbassano_orto.red
orbassano_orto.rgb
srtm
srtm_grezzo
uso_suolo2007


----------------------------------------------------------------------
Ran 0 tests in 0.117s
FAILED (errors=1)