Mocking methods having multiple return values in Play framework 2.5.3

I am working in Play 2.5.3 , scala 2.11.7., Akka 2.4.7 .I ma doing Unit Testing using Specs2 and Mockito . I have a method that i need to mock.It returns multiple 2 string values. when i am doing this :

val mockTokenGenerator = mock[ValidatorClass] mockTokenGenerator.tokenGenerator("testClient") returns ("abc" , "abc")

It gives me error : found :String , required : (String, String) tokenGenerator is the name of method i need to mock. What am i doing wrong here?