GitLab-CI как увеличить время жизни кэша?

.protostar_tests:
  stage: tests
  image: gitlab:4567/infrastructure/docker-images/archlinux:protostar
  allow_failure: true
  only:
    - pushes
    - merge_requests
  tags:
    - galaxy-ci

.protostar_tests_cache:
  extends: .protostar_tests
  variables:
    PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
  cache:
    key: python_cache
    paths:
      - .cache/pip
      - venv/
  before_script:
    - pip install virtualenv
    - virtualenv venv
    - source venv/bin/activate

unit-test:
  extends: .protostar_tests_cache
  script:
    - pip install -r requirements.txt
    - python manage.py migrate
    - python manage.py test tests/unit/parallel/ --pattern="tests_*.py"
    - python manage.py test tests/unit/not_parallel/ --pattern="tests_*.py"
  allow_failure: false
  only:
    - merge_requests
    - master
    - tags