language: python
python:
  - "2.6"
  - "2.7"
  - "3.2"
  - "3.3"
  - "3.4"
  - "pypy"
  - "pypy3"
  - "pypy-5.3.1"
install:
  - 'pip install ".[test]"'
script: pytest

language: python
python:
  - "2.6"
  - "2.7"
  - "3.2"
  - "3.3"
  - "3.4"
  - "pypy"
  - "pypy3"
  - "pypy-5.3.1"
install:
  - pip install -e .[test]
script: pytest

Install test requirement in editable mode
Install test requirement in editable mode

Travis run an old version of pip which does not work with extra keywords otherwise
https://stackoverflow.com/questions/42510052/pip-install-test-not-working-in-python2-7-9-pip-version-6-0-7
