diff --git a/src/tree.c b/src/tree.c
index 22ff887..bb23d5c 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -1689,30 +1689,30 @@ void tree_avl_breadth(struct _tree* self, struct _tree_node* root)
 
     if(node != NULL)
     {
-        queue->push(queue, node);
+        queue->push(queue, &node);
         while(!queue->empty(queue))
         {
-            queue->pop(queue, node);
+            queue->pop(queue, &node);
             if(!self->_right_priority)
             {
                 if(node->left != NULL)
                 {
-                    queue->push(queue, node->left);
+                    queue->push(queue, &node->left);
                 }
                 if(node->right != NULL)
                 {
-                    queue->push(queue, node->right);
+                    queue->push(queue, &node->right);
                 }
             }
             else
             {
                 if(node->right != NULL)
                 {
-                    queue->push(queue, node->right);
+                    queue->push(queue, &node->right);
                 }
                 if(node->left != NULL)
                 {
-                    queue->push(queue, node->left);
+                    queue->push(queue, &node->left);
                 }
             }
             self->print_obj(node->obj);
diff --git a/test/test.c b/test/test.c
index ec6e894..2b4e99f 100644
--- a/test/test.c
+++ b/test/test.c
@@ -38,8 +38,8 @@ int main()
         // test_list();
         // test_stack();
         // test_deque();
-        test_queue();
-        // test_tree();
+        // test_queue();
+        test_tree();
 
         // rbtree_test();
     }
diff --git a/test/tree_test.c b/test/tree_test.c
index 9b3bd4e..a3b0b49 100644
--- a/test/tree_test.c
+++ b/test/tree_test.c
@@ -267,6 +267,15 @@ void tree_test(void)
 #endif
 #endif
 
+/**
+ * @brief 
+ * int data[] = { 5,2,3,1,7,8,6 };
+ *           5
+ *      |         |
+ *      2         7
+ *   |    |     |   |
+ *   1    3     6   8
+ */
 void test_tree_num(void)
 {
     uint32_t i = 0;