Tests/DependencyInjection/Fixtures/config/yml/orm_entity_listener_abstract.yml

services:
    entity_listener:
        abstract: true
        class: EntityListener
        tags:
            - { name: doctrine.orm.entity_listener }

doctrine:
    dbal:
        default_connection: default
        connections:
            default:
                dbname: db

    orm:
        default_entity_manager: em1
        entity_managers:
            em1: