docker compose-无法连接到postgres db

我试图在Jenkins slave上运行docker compose命令,但在运行命令pytest tests/integration时失败。 该命令使用后端作为postgres运行集成测试。 Dockerfile是

version: "3.4"
services:
  test:
    build:
      context: ../..
      dockerfile: Dockerfile
    depends_on:
      - postgres_db
    environment:
      PG_UNITTEST_DB: "postgresql://testuser:testpassword@postgres_db/testdb"
    command: pytest tests/integration
  postgres_db:
    image:  postgis/postgis
    ports:
      - "5432:5432"
    environment:
      POSTGRES_PASSWORD: testpassword
      POSTGRES_USER: testuser
      POSTGRES_DB: testdb

我得到的错误是

psycopg2.OperationalError: could not connect to server: Connection refused
 Is the server running on host "postgres_db" (172.19.0.2) and accepting
 TCP/IP connections on port 5432?

我试图在postgres_db部分的docker compose文件中公开5432端口,但没有帮助。同样的代码在本地运行良好。我运行的命令是

docker-compose -f tests/integration/docker-compose.yml up --build --exit-code-from test