エラーメッセージ:
$ sbt test
[info] Loading global plugins from /Users/harukasan/.sbt/0.13/plugins
[info] Loading project definition from /Users/harukasan/repo/play-test/project
[info] Set current project to play-test (in build file:/Users/harukasan/repo/play-test/)
[info] Compiling 1 Scala source to /Users/harukasan/repo/play-test/target/scala-2.11/test-classes...
[info] - play.api.libs.concurrent.ActorSystemProvider - Starting application default Akka system: application
[info] - play.api.libs.concurrent.ActorSystemProvider - Shutdown application default Akka system: application