language: python
python:
    - 3.5
    - 3.4
    - 3.3
    - 2.7
install:
    - pip install -r dev_requirements.txt
script:
    - pytest tests

language: python
python:
    - 3.5
    - 3.4
    - 3.3
    - 2.7
install:
    - pip install -r dev_requirements.txt
script:
    - py.test tests

Fix test command for Travis.
Fix test command for Travis.
