diff --git a/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
index 54289427116ab..4fdd7a7358519 100644
--- a/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
@@ -17,15 +17,8 @@
 
 package org.apache.spark.rpc.akka
 
-import scala.concurrent.Await
-import scala.concurrent.ExecutionContext.Implicits.global
-import scala.concurrent.duration._
 import scala.language.postfixOps
 
-import akka.actor.{Actor, ActorSystem, Props}
-import akka.pattern.ask
-import com.typesafe.config.{ConfigFactory, ConfigValueFactory}
-
 import org.apache.spark.{SecurityManager, SparkConf}
 import org.apache.spark.rpc._