language: python
python:
    - 2.7
    - 3.5
    - pypy
install:
    - pip install -U 'setuptools>=18.5' 'pip>=6.0'
script:
    - python runtests.py

language: python
python:
    - 2.7
    - 3.5
    - pypy-5.3.1
install:
    - pip install -U 'setuptools>=18.5' 'pip>=6.0'
script:
    - python runtests.py

Upgrade PyPy from 2.5 to 5.3
Travis: Upgrade PyPy from 2.5 to 5.3
