---
kind: pipeline
name: test2.1

platform:
  os: linux
  arch: amd64

steps:
- name: test2.1
  image: ruby:2.1
  commands:
  - bundle install
  - bundle exec rake spec

---
kind: pipeline
name: test2.2

platform:
  os: linux
  arch: amd64

steps:
- name: test2.2
  image: ruby:2.2
  commands:
  - bundle install
  - bundle exec rake spec

depends_on:
- test2.1

...