test_doctests stderr

etc/python/grass/lib/gis.py:807: DeprecationWarning: classic int division
  ('__val', c_ulong * (1024 / (8 * sizeof(c_ulong)))),
E
======================================================================
ERROR: __main__ (unittest.loader.LoadTestsFailure)
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AttributeError: 'module' object has no attribute 'conversion'

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Ran 1 test in 0.000s
FAILED (errors=1)