test_v_in_pdal_filter 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,
ssssssssssssss
----------------------------------------------------------------------
Ran 14 tests in 0.322s
OK (skipped=14)