The first run of this triggered:

tests/test_clients/test_mw2isa.py:38: AssertionError
----------------------------- Captured stdout call -----------------------------
user options {'studyid': 'ST000367', 'outputdir': '/tmp/tmpdc446jk1', 'dl_option': 'no', 'validate_option': True}
Error: in main() method something went wrong
conversion failed

...which appears to be caused by the tests calling a live URL (http://www.metabolomicsworkbench.org/...) on line 1070 of isatools/net/mw2isa/init.py, which timed out.

This should indeed be mocked to avoid such situations. I'll open a ticket.

coverage: 82.314% (+0.004%) from 82.31%
when pulling 8976a8e on isatools_materials_test_deprecation
into 68ed2c4 on develop.