29 env: TOXENV=py27-postgres
31 env: TOXENV=py34-postgres
33 env: TOXENV=py35-postgres
35 env: TOXENV=py36-postgres
38 env: TOXENV=py37-postgres
40 env: TOXENV=py27-sqlite
42 env: TOXENV=py34-sqlite
44 env: TOXENV=py35-sqlite
46 env: TOXENV=py36-sqlite
49 env: TOXENV=py37-sqlite
51 env: TOXENV=py27-flake8
54 env: TOXENV=py37-flake8
57 - travis_retry pip install --upgrade "pip < 19.1" setuptools tox ppu
63 - remove-old-files.py -o 180 ~/.cache/pip