diff --git a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
index dd4fd535d3577e32137eadf325053ac50dd676b6..58ea0cc30e954bcd3285877ed4a7e782e17df789 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
@@ -21,9 +21,6 @@ import java.nio.{ByteBuffer, MappedByteBuffer}
 import java.util.Arrays
 
 import akka.actor._
-import org.apache.spark.SparkConf
-import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
-import org.apache.spark.util.{AkkaUtils, ByteBufferInputStream, SizeEstimator, Utils}
 import org.mockito.Mockito.{mock, when}
 import org.scalatest.{BeforeAndAfter, FunSuite, PrivateMethodTester}
 import org.scalatest.concurrent.Eventually._