What is recommended library for unit testing Playframework 2.3.7 RESTful api

I want to unit test Playframework 2.3.7 RESTful api. I'm using Scala 2.11, Play 2.3.7, slick 3.0, PostgreSql 9.4. I have implemented REST api for CURD opertion. now I would like to unit test it.

I found several of them by googling. I realize many of them are depreciated or found known issues.

So what is newer, easier, recommended framework available? Thanks in advance!