Scala: Not a good way to test asynchronous code

ClassThatReturnsFuturesTest.scala

  test("Test a asynchronous method synchronously") {
    val underTest = new ClassThatReturnsFutures()
    val futureResult = underTest.goDoSomething()

    futureResult onComplete {
      case Success(value) => value should equal("Something")
      case Failure(exp) => fail(exp)
    }
  }