Top level @TestConfiguration picked up by @SpringBootTest without @Import when it referenced from another module

Main reason for @TestConfiguration is to allow having configuration without picking it up by auto scanning.

But my test with @SpringBootTest and without any @Import loads definitions from top-level class marked by @TestConfiguration.

|    |    +--- org.springframework.boot:spring-boot-starter-test: -> 1.5.3.RELEASE
|    |    |    +--- org.springframework.boot:spring-boot-test:1.5.3.RELEASE
|    |    |    \--- org.springframework:spring-test:4.3.8.RELEASE

@TestConfiguration is defined in Core module and @SpringBootTest class in module that uses Core test module via Gradle’s testCompile project (...).

Documentation says:

https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-testing-spring-boot-applications-excluding-config

When placed on a top-level class, @TestConfiguration indicates that classes in src/test/java should not be picked up by scanning.

Is dependency for module via testCompile project a reason for a problem? How can I mark a class to be eligible for @Import without being auto-scanned?

[tkent]

In case somebody happens across this issue, we ran into a similiar problem to the one described by @gavenkoa.

In our case, we found that someone had mistakenly included an unnecessary @ComponentScan annotation on one of the app configuration classes. Probably just a reflex from the pre @SpringBootApplication days.

Anyway, removing the unneeded @ComponentScan resolved the issue.

[mpscheidt]

If test is configured with @SpringBootConfiguration plus @ComponentScan instead of @SpringBootApplication, then excludeFilters need to be added in order to avoid picking up @TestConfigurations without explicit @Import:

@SpringBootConfiguration
@ComponentScan(value = { "my.base.package" }, excludeFilters = {
		@Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
		@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
public class BootTestConfig { }