32 env: TOXENV=py27-postgres
34 env: TOXENV=py34-postgres
36 env: TOXENV=py35-postgres
38 env: TOXENV=py36-postgres
40 env: TOXENV=py37-postgres
42 env: TOXENV=py27-sqlite
44 env: TOXENV=py34-sqlite
46 env: TOXENV=py35-sqlite
48 env: TOXENV=py36-sqlite
50 env: TOXENV=py37-sqlite
52 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