Try poussetaches

.travis.yml

@@ -16,6 +16,7 @@ install:
  - sudo chmod +x /usr/local/bin/docker-compose
  - docker-compose --version
  - pip install -r dev-requirements.txt
+ - git clone https://github.com/tsileo/poussetaches.git && cd poussetaches && docker build . -t poussetaches:latest && cd -
 script:
  - mypy --ignore-missing-imports .
  - flake8 activitypub.py