language: python
sudo: false
python:
  - "2.7"
  - "3.4"
  - "3.5"
  - "3.6"

install:
  # tox-travis automatically splits the jobs
  - pip install tox-travis

script:
  - tox

dist: xenial
language: python
sudo: false
python:
  - "2.7"
  - "3.4"
  - "3.5"
  - "3.6"

install:
  # tox-travis automatically splits the jobs
  - pip install tox-travis

script:
  - tox

Switch Travis `dist` to `xenial`
Switch Travis `dist` to `xenial`

To avoid build failing due to the version of sqlite being too old for Django 2.2.
