diff --git a/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala b/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
index deab798ee08d2..cac7dcfbde0bc 100644
--- a/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
+++ b/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
@@ -221,8 +221,8 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
     var keepUnrolling = true
     // Initial per-thread memory to request for unrolling blocks (bytes). Exposed for testing.
     val initialMemoryThreshold = conf.getLong("spark.storage.unrollMemoryThreshold", 1024 * 1024)
-    // How often to check whether we need to request more memory. Exposed for testing.
-    val memoryCheckPeriod = conf.getLong("spark.storage.unrollCheckPeriod", 16)
+    // How often to check whether we need to request more memory
+    val memoryCheckPeriod = 16
     // Memory currently reserved by this thread (bytes)
     var memoryThreshold = initialMemoryThreshold
     // Memory to request as a multiple of current vector size
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 7f9878fbf669c..1e8dd83e6d803 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
@@ -76,7 +76,6 @@ class BlockManagerSuite extends FunSuite with Matchers with BeforeAndAfter
     conf.set("spark.driver.port", boundPort.toString)
     conf.set("spark.storage.unrollFraction", "0.4")
     conf.set("spark.storage.unrollMemoryThreshold", "512")
-    conf.set("spark.storage.unrollCheckPeriod", "1")
     SparkEnv.set(env)
 
     master = new BlockManagerMaster(