horizon/playbooks/npm-test-xstatic-master/pre.yaml

- hosts: all
  roles:
    # Ensure sibling packages are installed into "npm" tox env.
    # "tox" role installs sibling packages based on required-projects
    # configuration in zuul.yaml.
    - role: tox
      vars:
        tox_envlist: npm
        tox_extra_args: "-vv --notest"