I tried Junit 5.3 parallel execution for Spring Boot (2.7.12) integration tests.
junit.jupiter.execution.parallel.enabled = true
junit.jupiter.execution.parallel.mode.default = same_thread
junit.jupiter.execution.parallel.mode.classes.default = concurrent
The execution time for tests increased, and by the logs I see that Spring application is initiated more frequently (it looks like the context is not cached/reused).
I tried to runs all the classes in the same thread (by putting same_thread), using annotations @Execution(ExecutionMode.SAME_THREAD) and @Isolated over test classes, but it did not help - the context is initiated each time for a new class.
The only thing that helps is setting junit.jupiter.execution.parallel.enabled back to false.
Is there any ability to reuse Spring Application context for junit tests run in parallel?