How to define the test step only once in pipelines?

Question

We have a default pipeline which has all the steps for automatic testing.

For the test and master branch we also have a deploy step.

How can we define the automatic testing step only once?

pipelines: 
default: 
    - step: 
caches: 
      - pip 
      - poetry 
script: # Modify the commands below to build your repository. 
        - pip install poetry 
        - poetry install 
        - poetry run ./manage.py test --keepdb 
services: 
        - postgres 
branches: 
    'test':
        - step: ... etc

Roland van Laar · Accepted Answer

And found it on wikipedia: https://en.wikipedia.org/wiki/YAML#Advanced_components

Give a step a name:

-step: &id_NAME_SOMETHING
  script:
    - do something
    - do something too

And later on do:

-step: *id_NAME_SOMETHING