test_what 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,
.........FFF....F
======================================================================
FAIL: test_row_stdout_where_parallel (__main__.TestRasterWhat)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "temporal/t.rast.what/testsuite/test_what.py", line 147, in test_row_stdout_where_parallel
    self.assertLooksLike(text, t_rast_what.outputs.stdout)
  File "etc/python/grass/gunittest/case.py", line 190, in assertLooksLike
    'reference argument is not a string'))
AssertionError: reference argument is not a string 
False is not true

======================================================================
FAIL: test_row_stdout_where_parallel2 (__main__.TestRasterWhat)
Here without output definition, the default is used then
----------------------------------------------------------------------
Traceback (most recent call last):
  File "temporal/t.rast.what/testsuite/test_what.py", line 189, in test_row_stdout_where_parallel2
    self.assertLooksLike(text, t_rast_what.outputs.stdout)
  File "etc/python/grass/gunittest/case.py", line 190, in assertLooksLike
    'reference argument is not a string'))
AssertionError: reference argument is not a string 
False is not true

======================================================================
FAIL: test_row_stdout_where_parallel_cat (__main__.TestRasterWhat)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "temporal/t.rast.what/testsuite/test_what.py", line 168, in test_row_stdout_where_parallel_cat
    self.assertLooksLike(text, t_rast_what.outputs.stdout)
  File "etc/python/grass/gunittest/case.py", line 190, in assertLooksLike
    'reference argument is not a string'))
AssertionError: reference argument is not a string 
False is not true

======================================================================
FAIL: test_null_value (__main__.TestRasterWhatNull)
Test setting the null value
----------------------------------------------------------------------
Traceback (most recent call last):
  File "temporal/t.rast.what/testsuite/test_what.py", line 263, in test_null_value
    self.assertLooksLike(text,  t_rast_what.outputs.stdout)
  File "etc/python/grass/gunittest/case.py", line 190, in assertLooksLike
    'reference argument is not a string'))
AssertionError: reference argument is not a string 
False is not true

----------------------------------------------------------------------
Ran 17 tests in 21.300s
FAILED (failures=4)