No Session found for current thread in spring boot test

When using @SpringBean in different SpringBootTest, spring will create a separate context for each test since spring doesn't know if those two tests share the same mock beans. This caused "No Session found for current thread" when running two tests together.

Please clone the following repo to reproduce it.
git@github.com:ruiyang/gorm-spring-boot-hibernate-session-error.git
or
[https://github.com/ruiyang/gorm-spring-boot-hibernate-session-error](https://github.com/ruiyang/gorm-spring-boot-hibernate-session-error)

There are two tests:
VehicleServiceTest
ManufacturerServiceTest

test passes when running each individually
```
./gradlew test --tests *ManufacturerServiceTest*
./gradlew test --tests *VehicleServiceTest*
```

test will fail when running together

`./gradlew test`

Please help!
Thanks

Clone the linked reproduction repository and inspect VehicleServiceTest and ManufacturerServiceTest. Run each test separately with the provided Gradle commands, then run ./gradlew test to reproduce the combined failure. Done means identifying and resolving the cause of "No Session found for current thread" when both tests run together.

Written by the indexing model from the issue text.