.travis.yml

language: python
jobs:
  include:
    - name: "Python 3.8 on Linux"
      os: linux
#      if: branch = master
      dist: xenial
      language: python
      python: 3.8
      before_install:
        - sudo rm /usr/bin/python
        - sudo ln -s /usr/bin/python3 /usr/bin/python
        - python3 -m pip install tox-travis

    - name: "Python 3.8 on macOS"
      os: osx
#      if: branch = master
      osx_image: xcode11.6  # Python 3.8.0 running on macOS 10.14.6
      language: shell        # 'language: python' is an error on Travis CI macOS
      before_install:
        - python3 --version
        - python3 -m pip install --upgrade pip
        - sudo pip install tox-travis

    - name: "Python 3.8 on Windows"
      os: windows           # Windows 10.0.17134 N/A Build 17134
#      if: branch = master
      language: shell       # 'language: python' is an error on Travis CI Windows
      before_install:
        - choco install python --version 3.8.8
        - python --version
        - python -m pip install --upgrade pip
        - python -m pip install tox-travis
      env: PATH=/c/Python38:/c/Python38/Scripts:$PATH

install: pip install --upgrade pip

script:
  - tox -e short-test