diff --git a/src/tree.c b/src/tree.c
index 01ed33f..ec04664 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -1480,7 +1480,7 @@ static struct _tree_node* tree_trun_left_then_right(struct _tree* self, struct _
 {
     assert(self != NULL);
     assert(root != NULL);
-    struct _tree_node* node = root->right;
+    struct _tree_node* node = root->left;
     if(node != NULL)
     {
         tree_turn_left(self, node);
@@ -1493,7 +1493,7 @@ static struct _tree_node* tree_trun_right_then_left(struct _tree* self, struct _
 {
     assert(self != NULL);
     assert(root != NULL);
-    struct _tree_node* node = root->left;
+    struct _tree_node* node = root->right;
     if(node != NULL)
     {
         tree_turn_right(self, node);
diff --git a/test/test_tree.c b/test/test_tree.c
index 1d855fd..5af58ce 100644
--- a/test/test_tree.c
+++ b/test/test_tree.c
@@ -291,7 +291,7 @@ void test_tree_num(void)
     tree->print_obj = print_num;
     tree->compare = compare_num;
 
-    printf("\n\n----- test_queue_num -----\n");
+    printf("\n\n----- test_tree_num -----\n");
 
     printf("----- insert -----\n");
     for (i = 0; i < len; i++)