language: python
cache: pip
python:
 - '3.5'
 - '3.6'
 - '3.7-dev'

matrix:
    fast_finish: true
    include:
      - python: "3.5"
        env: TOXENV=flake8

    allow_failures:
      - env: TOXENV=flake8

install:
 - pip install -r requirements_dev.txt

before_script:
 - coverage erase

script:
 - tox

after_success:
 - coveralls