diff --git a/priority_queue/priority_queue.go b/priority_queue/priority_queue.go
index 835ede5..5d2897b 100644
--- a/priority_queue/priority_queue.go
+++ b/priority_queue/priority_queue.go
@@ -20,9 +20,11 @@ type PriorityQueue struct {
 func (pq *PriorityQueue) String() string {
 
 	content := ""
-
 	iter := pq.avl.Iterator()
-	iter.End()
+
+	for !iter.Last() {
+		iter.Next()
+	}
 
 	for iter.Prev() {
 		pl := iter.Value().(*PriorityList)
@@ -79,9 +81,8 @@ func (pq *PriorityQueue) Push(value interface{}) {
 			pq.avl.Put(plsp.head.value, plsp)
 			log.Println("list:", pl.head.value, pl.String())
 			log.Println("list:", plsp.head.value, plsp.String())
-			log.Println("values:", pq.avl.Values())
+			log.Println("pq:", pq.avl.Values())
 			log.Println("pq:", pq.String(), "\n----------")
-
 		}
 	}()
 
diff --git a/priority_queue/priority_queue_test.go b/priority_queue/priority_queue_test.go
index 681cd22..f2ab7d4 100644
--- a/priority_queue/priority_queue_test.go
+++ b/priority_queue/priority_queue_test.go
@@ -99,7 +99,8 @@ func TestAvl(t *testing.T) {
 	}
 
 	iter := avl.Iterator()
-	iter.Next()
+	iter.End()
+	iter.Prev()
 	t.Error(avl.Values(), iter.Value())
 
 	f, ok := avl.Floor(10)
@@ -111,6 +112,18 @@ func TestAvl(t *testing.T) {
 	if ok {
 		t.Error("Ceiling", f)
 	}
+
+	for _, v := range []int{9, 2, 3, 45, 51, 16, 18, 11} {
+		avl.Put(v, v)
+	}
+
+	iter = avl.Iterator()
+	iter.End()
+
+	for iter.Prev() {
+		t.Error(iter.Value())
+	}
+
 }
 
 func TestHeap(t *testing.T) {