dist: xenial
sudo: false
language: python
python:
  - "3.5"
  - "3.6"
  - "3.7"
install: "python setup.py -q install"
script: py.test


dist: xenial
sudo: false
language: python
python:
  - "3.5"
  - "3.6"
  - "3.7"
install:
  - pip install .[tests]
script: py.test


Change Travis-CI install command to use extra
Change Travis-CI install command to use extra
