Test fails on Python <3.6
Since release 0.9.0 of csb43 tests are failing because the package is not correctly published: https://bitbucket.org/wmj/csb43/issues/22/release-090-requires-python-36.
Since release 0.9.0 of csb43 tests are failing because the package is not correctly published: https://bitbucket.org/wmj/csb43/issues/22/release-090-requires-python-36.