Cannot access to my PGSQL Docker container with PHP container

I’m setting up a CI using Docker using Github workflows for my Symfony project. I use for this an image of PHP8.1-fpm and Pgsql-13-alpine.

The docker-compose.test.yaml :

version: '3.3'
services:
    phptest:
        build: ./devops/docker/tests/docker/php
        volumes:
            - .:/var/www:delegated
        links:
            - dbtest
        networks:
            - test

    dbtest:
        image: postgres:${POSTGRES_VERSION:-13}-alpine
        environment:
            POSTGRES_DB: test
            POSTGRES_PASSWORD: test
            POSTGRES_USER: test
        ports:
            - 5431:5432
        networks:
            - test

networks:
    test:

The .env.test:

# define your env variables for the test env here
KERNEL_CLASS='AppKernel'
APP_SECRET='$ecretf0rt3st'
SYMFONY_DEPRECATIONS_HELPER=999999
PANTHER_APP_ENV=panther
DATABASE_URL=postgresql://test:test@dbtest:5431/test?serverVersion=13&charset=utf8

The PHP container works fine for the others tests and pdo_pgsql is installed inside my Dockerfile.

My Makefile looks like this :

DOCKER_COMPOSE = docker-compose
DOCKER_TEST = $(DOCKER_COMPOSE) -f docker-compose.test.yaml run --rm

.PHONY: test
test: ##@ Execute les tests
    $(DOCKER_TEST) phptest bin/console doctrine:schema:validate --skip-sync --env=test
    $(DOCKER_TEST) phptest bin/console doctrine:schema:update --force --env=test

When I tried to update the database schema I have this error :

An exception occurred in the driver: SQLSTATE[08006] [7] could not connect to server: Connection refused  
Is the server running on host "dbtest" (192.168.208.2) and accepting TCP/IP connections on port 5431?                                                                          

I tried to change the .env.test with 127.0.0.1 instead dbtest too but same error.

I tried a loot of fix by different topics I found without success. Someone has an idea ?

Thanks by advance