Also use latest version of tox.
@@ -60,7 +60,7 @@ matrix:
install:
- pip install --upgrade "pip==9.0.1"
- pip install "virtualenv==15.1.0"
- - pip install "tox>=2.3.0,<2.4"
+ - pip install "tox==2.8.2"
- TOX_ENV=py$TRAVIS_PYTHON_VERSION
script:
