MockJedisPool not working for scala

[hanrw]

Exception:
redis.clients.jedis.exceptions.JedisException: Could not return the resource to the pool
[info] at redis.clients.util.Pool.returnResourceObject(Pool.java:65)
[info] at org.sedis.Pool.withJedisClient(sedis.scala:105)
[info] at com.remarkmedia.dragon.service.infrastructure.oauth2.OauthClient$.validate(OauthClient.scala:39)
[info] at com.remarkmedia.dragon.service.infrastructure.oauth2.OauthClientSpec$$anonfun$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(OauthClientSpec.scala:23)
[info] at com.remarkmedia.dragon.service.infrastructure.oauth2.OauthClientSpec$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(OauthClientSpec.scala:23)
[info] at com.remarkmedia.dragon.service.infrastructure.oauth2.OauthClientSpec$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(OauthClientSpec.scala:23)

Code:
val jedisPool = new MockJedisPool(new JedisPoolConfig(), "localhost")
implicit val sedisPool = new Pool(jedisPool)