[SOLVED] Enable concurrency on gitlab ci runner

I’ve the latest CI runner (multi something) and CI server. I have three jobs to execute on the same stage and they’re happening sequentially. How do I get them to run at the same time?

image: wjdp/flatcar

services:
  - postgres

before_script:
  - virtualenv env
  - source env/bin/activate
  - pip install -r requirements.txt
  - bower install --allow-root
  - cp src/local_settings.py.example src/local_settings.py
  - wget $TEST_FIXTURE -O tmp/test_fixture.json

stages:
  - test

django-validate:
  stage: test
  script:
    - source env/bin/activate
    - src/manage.py validate

django-check:
  stage: test
  script:
    - source env/bin/activate
    - src/manage.py check

django-test:
  stage: test
  script:
    - source env/bin/activate
    - src/manage.py test xSACdb xsd_about xsd_auth xsd_frontend xsd_help xsd_kit xsd_members xsd_sites xsd_training xsd_trips

Found the answer,

concurrency option in the config file on the runner host itself: