There is a dev-docker-compose, I want to make testing-docker-compose, but I need the database volumes to be new - not to use the previous ones - how?

Question

Software testing

i have dev-docker-compose.yml there are several servers, several databases: postgres, redis etc...
now i want to create test-docker-compose.yml - i changed container/service names, for example now like this:
postgres:
image: postgres
restart: always
ports:
- "5432:5432"
volumes:
- postgres:/var/lib/postgresql/data
and now i have changed it to
test_postgres:
image: postgres
restart: always
ports:
- "5432: 5432"
volumes:
- test_postgres:/var/lib/postgresql/data
but when I go to the database using navicat or dbeaver, no matter what, I see the same data that was with the first version of dev-docker-compose.
that is, how do I create all the same services with the help of a new compose. but for the databases to be new? this is for running testing. I don't need to change or remove the bases of the previous compose. just skip tests and everything in new empty bases

Answer 1

Explicitly specify the port:

version: '3.5'
services:
  postgres1:
    image: postgres:9.6
    environment:
      POSTGRES_PASSWORD: example1
    ports: 
      - "5000:5432"

  postgres2:
    image: postgres:9.6
    environment:
      POSTGRES_PASSWORD: example2
    ports:
      - "5001:5432"