When running tox locally during development, there's no need to also test python 3.5.
2.7 and 3.6 are enough, and the CI takes care of the others (3.4, 3.5, pypy, etc.).
In the latest PyPI release 3.6.0, an incosistency in the title levels between
README.rst and NEWS.rst caused PyPI to not correctly format the reStructuredText
document.
I've fixed the PKG-INFO manually for the current release:
https://pypi.python.org/pypi/FontTools/3.6.0
The next release should be fine.