> test

$ copy-file changes/Success.scala src/test/scala/Success.scala
> test

> test-only com.foo.junit.test.blah.Success

$ copy-file changes/Failure.scala src/test/scala/Failure.scala
-> test
-> test-only com.foo.junit.test.blah.Failure
> test-only com.foo.junit.test.blah.Success

> set fork in Test := true
> test-only com.foo.junit.test.blah.Success
