New folder appears when tests are generated in AndroidStudio, how do I delete it?

when I pressed ALT + Enter + Generate Tests in Android Studio two "tests"-folders appeared (as seen on the image below). I would like to keep only the green one, but when I delete the blue one, the green also gets automatically deleted.*

I also can't find any obvious way of deleting the blue folder.

Do both these folders need to be there? If not, how do I keep only one of them?

Thank you!