As in the previous recipe, suppose you reported an issue with partner_address_street3 and received a notification that the issue was solved in a pull request, which hasn't been merged in the 12.0 branch of the project. The developer asks you to validate the fix in PR #123. You need to update a test instance with this branch.

You should not try out such branches directly on a production database, so first create a test environment with a copy of the production database (refer to Chapter 1, Installing the Odoo Development Environment, and Chapter 3, Server Deployment).