Spring4 JUnit tests : Load SQL to a H2 db

I'm trying to write tests for a Spring Boot (Spring 4) Application.

My Junit test class is configured like this to allow autowired.

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = SpringApp.class)
public class MyServiceTest {
...

My src/main/resources/application.properties is like this

spring.jpa.database=POSTGRESQL
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=update

spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost/mydb
spring.datasource.username=BNF0016779
spring.datasource.password=

In test context, src/test/resources/application.properties is just empty.

In can query the db as usual, creating objects...

But I'd like to create a data init sql.

To begin with a strange behavior, It seems that Spring loads any "schema.sql" in classpath. Something like the following is not required ?

//This is not required to execute schema.sql
@Configuration
public class DatabaseTestConfig {
    @Bean
    public DataSource dataSource() {
        return new EmbeddedDatabaseBuilder()
            .setType(EmbeddedDatabaseType.H2)
            .addScript("classpath:schema.sql")
            .build();
    }
}

Then, I can't create any Table from this SQL. Always receive org.h2.jdbc.JdbcSQLException: Table "MY_TABLE" already exists; SQL statement:

H2 is supposed to be a in-memory DB, no keeping data between two startup ! Why do I receive these errors ?

Any ideas ? Thanks