Play! Scala 2.5 : testing classes injecting cache leads to an error

I'm using for the first time the cache of Play! Scala 2.5. It works well except for the tests.

My test still pass since I don't need the cache but I get this error (and a lot of others telling the same thing):

Unable to provision, see the following errors:

1) Error in custom provider, play.api.cache.EhCacheExistsException: An EhCache instance with name 'play' already exists.

I understand the error but I didn't manage to implement my own version of the cache API (to mock it).

I tried to do what is told on the play mailing list but without success (there is some differences with Play! 2.4 since the module is dependency injected). Any help would be welcome.

Edit: what I have done (and it does not change anything):

My CacheApi version (just for the tests):

class MyCacheApi extends CacheApi {
  lazy val cache = {
    val manager = CacheManager.getInstance()
    manager.addCacheIfAbsent("play")
    manager.getCache("play")
  }

  def set(key: String, value: Any, expiration: Duration = Duration.Inf) = {}

  def remove(key: String) = {}

  def getOrElse[A: ClassTag](key: String, expiration: Duration = Duration.Inf)(orElse: => A): A = {
    get[A](key).getOrElse {
      val value = orElse
      set(key, value, expiration)
      value
    }
  }

  def get[T: ClassTag](key: String): Option[T] = None
}

And in my tests, I use it like this:

lazy val appBuilder = new GuiceApplicationBuilder()
    .in(Mode.Test)
    .overrides(bind[CacheApi].to[MyCacheApi])

lazy val injector = appBuilder.injector()
lazy val cache = new MyCacheApi
lazy val facebookAPI = new FacebookAPI(cache)

But when I'm testing the functions of the class FacebookAPI, the tests pass, but I still have a lot of error messages due to the fact that an EhCache instance with name 'play' already exists...

I finally found a solution.

I added in a test.conf file (in the conf folder):

play.cache.bindCaches = ["controller-cache", "document-cache"]

play.cache.createBoundCaches = false

And to make this conf file used in the test I just added in the setting part of my build.sbt the following line:

javaOptions in Test += "-Dconfig.resource=tests.conf"

Let me know if you need more details.