Spring Boot integration test against real postgres DB

I have been looking at this problem now for hours and I know it's something silly.

My Spring Boot integration test can't find my Postgres table (relation) while the REST API works fine.

org.postgresql.util.PSQLException: ERROR: relation "data_source" does not exist

The DB is Postgres in Docker container (not using in mem container).

Here relevant code.

Any help will be much appreciated !

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.16</version>
        </dependency>

    </dependencies>

test/resources/application.properties

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQL95Dialect
spring.jpa.hibernate.ddl-auto=none
spring.jpa.hibernate.show-sql=true
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=postgres
spring.datasource.password=postgres
spring.datasource.initialization-mode=always
spring.datasource.initialize=true
spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
# parses java variables in camel case to data base naming convention with underscores
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true

@SpringBootTest
@AutoConfigureMockMvc
public class TrainingDataServiceIT {
    @Autowired
    private MockMvc mockMvc;

    @Autowired
    private ObjectMapper objectMapper;

    @Autowired
    DataSourceRepository dataSourceRepository;

    @Test
    public void myTest() throws Exception {
        mockMvc.perform(post("/get-ds")
                .contentType(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content()
                        .contentTypeCompatibleWith(MediaType.APPLICATION_JSON));

    }

EDIT to add my entity (columns emitted):

@Entity
@DynamicUpdate
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Table(name = "data_source")
public class DataSourceEntity {

EDIT

postgres=# \dn
  List of schemas
  Name  |  Owner
--------+----------
 public | postgres
(1 row)

Edit:

version: '3'


services:
    postgres:
        image: postgres:10.15-alpine
        container_name: postgres
        environment:
            POSTGRES_USER: postgres
            POSTGRES_PASSWORD: postgres
        volumes:
            - ./postgres/init.sql:/docker-entrypoint-initdb.d/init.sql
        ports:
            - 5432:5432