os:
    - linux
    - osx
matrix:
    allow_failures:
        - os: osx
language: python
python:
    - "3.4"
    - "3.5"
script: make unittest

os:
    - linux
    - osx
matrix:
    allow_failures:
        - os: osx
language: python
python:
    - "3.3"
    - "3.4"
    - "3.5"
script: make unittest

Test on Python 3.3 also.
Test on Python 3.3 also.
