diff --git a/src/main/scala/scorex/core/network/SyncTracker.scala b/src/main/scala/scorex/core/network/SyncTracker.scala
index 67f777bed..74e1b41d1 100644
--- a/src/main/scala/scorex/core/network/SyncTracker.scala
+++ b/src/main/scala/scorex/core/network/SyncTracker.scala
@@ -25,14 +25,14 @@ class SyncTracker(nvsRef: ActorRef,
   import History._
   import scorex.core.utils.TimeProvider.Time
 
-  private var schedule: Option[Cancellable] = None
+  protected var schedule: Option[Cancellable] = None
 
-  private val statuses = mutable.Map[ConnectedPeer, HistoryComparisonResult]()
-  private val lastSyncSentTime = mutable.Map[ConnectedPeer, Time]()
+  protected val statuses = mutable.Map[ConnectedPeer, HistoryComparisonResult]()
+  protected val lastSyncSentTime = mutable.Map[ConnectedPeer, Time]()
 
-  private var lastSyncInfoSentTime: Time = 0L
+  protected var lastSyncInfoSentTime: Time = 0L
 
-  private var stableSyncRegime = false
+  protected var stableSyncRegime = false
 
   def scheduleSendSyncInfo(): Unit = {
     schedule foreach {