Postgres Testcontainer not working with Spring Boot 4

[adityamparikh]

Was looking to upgrade a spring-boot 3.5.x project to spring boot 4 using https://docs.arconia.io/arconia-cli/latest/update/spring-boot/ and saw

Caused by: org.springframework.boot.autoconfigure.service.connection.ConnectionDetailsFactoryNotFoundException: No ConnectionDetailsFactory found for source '@ServiceConnection source for Bean 'postgresContainer' ... You may need to add a 'name' to your @ServiceConnection annotation.

So I tried bootstrapping a new project from Spring Initializr:

https://start.spring.io/#!type=gradle-project-kotlin&language=java&platformVersion=4.0.0&packaging=jar&configurationFileFormat=properties&jvmVersion=25&groupId=com.example&artifactId=demo&name=demo&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.demo&dependencies=web,spring-restclient,postgresql,testcontainers
and observe the same issue.

[philwebb]

This is a byproduct of the modularization, you need to include the following SQL dependency which will provide the service connection:

implementation 'org.springframework.boot:spring-boot-starter-jdbc'

[philwebb]

Flagging to see if the team has any ideas how to improve the error.

[wilkinsona]

@adityamparikh can you please share some more details about the dependencies of your real application where the problem occurred? The new project bootstrapped on start.spring.io is a little strange as it depends on Postgres but not on anything to access it such as JDBC, jOOQ, or JPA.

[adityamparikh]

@wilkinsona Thanks! My mistake.
The project builds after adding
implementation("org.springframework.boot:spring-boot-starter-jdbc") testImplementation("org.springframework.boot:spring-boot-starter-jdbc-test")