play.application.loader for Test mode

[Zoro]

Hello, i have a custom loader like this:

package global

import com.typesafe.config.ConfigFactory

import play.api.Mode._

import play.api.inject.guice.{GuiceApplicationBuilder, GuiceApplicationLoader}

import play.api.{ApplicationLoader, Configuration, Logger}

class CustomApplicationLoader extends GuiceApplicationLoader {

  override def builder(context: ApplicationLoader.Context): GuiceApplicationBuilder = {

    val builder = initialBuilder.in(context.environment).overrides(overrides(context): _*)

    context.environment.mode match {

      case Prod =>

        // start mode

        Logger.info("Starting Prod mode...")

        builder.loadConfig(context.initialConfiguration)

      case Dev =>

        // run mode

        Logger.info("Starting Dev mode...")

        val devConf = Configuration(ConfigFactory.load("application.dev.conf"))

        builder.loadConfig(devConf)

      case Test =>

        // test mode

        Logger.info("Starting Test mode...")

        val testConf = Configuration(ConfigFactory.load("application.test.conf"))

        builder.loadConfig(testConf)

    }

  }

}

I also added this line to application.conf:

play.application.loader="global.CustomApplicationLoader"

I need this for various configuration files, depending on the startup mode. And this is working for prod or dev mode. But not tests. I wrote simple test: 

import org.specs2.concurrent.ExecutionEnv

import org.specs2.mutable._

import play.api.Mode

import play.api.inject.guice.GuiceApplicationBuilder

import play.api.test.Helpers.running

class Test extends Specification {

  "The 'Hello world' string" should {

    "contain 11 characters" >> { implicit ee: ExecutionEnv =>

      val app = new GuiceApplicationBuilder()

    //    .configure("play.application.loader" -> "global.CustomApplicationLoader")  // this line doesn't help me

        .in(Mode.Test)

        .build()

      running(app){

        "Hello world" must have size 11

      }

    }

  }

}

But Test does not load application.test.conf file. As if Test not using my CustomApplicationLoader


What wrong?

[Zoro]

Forgot to specify -> Play 2.4.4