I am using spring-boot-3.1.0-SNAPSHOT with Spring Data JPA, Postgres, Testcontainers.
For local development, I have created TestcontainersConfiguration.java and TestApplication.java under src/test/java as follows:

@TestConfiguration(proxyBeanMethods = false) public class TestcontainersConfiguration { @Bean @ServiceConnection public PostgreSQLContainer<?> postgreSQLContainer() { return new PostgreSQLContainer<>("postgres:15.2-alpine"); } } 

public class TestApplication { public static void main(String[] args) { SpringApplication .from(Application::main) .with(TestcontainersConfiguration.class) .run(args); } } 

When I run TestApplication.java from IDE then Testcontainers is starting the Postgres database and application is working fine.

Problem:
But, if I add spring-boot-devtools dependency and run TestApplication.java then Testcontainers integration is stopped working. ie, Postgres container is not being started and application startup is failing.

Reproducer: https://github.com/sivaprasadreddy/spring-boot-testcontainers-devmode

In pom.xml uncomment spring-boot-devtools dependency and run to reproduce the problem.