Warnings in Tests

[animmosmith]

The following warnings are raised during the running of tests:]
tr_d = dist.fetch_build_eggs(dist.tests_require or [])
C:\Miniconda\envs\pyopia\lib\site-packages\setuptools\command\test.py:195: _DeprecatedInstaller: setuptools.installer and fetch_build_eggs are deprecated.
!!

    ********************************************************************************
    Requirements should be satisfied by a PEP 517 installer.
    If you are using pip, you can try `pip install --use-pep517`.
    ********************************************************************************

!!
er_d = dist.fetch_build_eggs(