diff --git a/Programming_Paradigms/bintree_test.py b/Programming_Paradigms/bintree_test.py
index 1ec16ca2977f4a55b52b75bfdea2f8c64ad5f37d..a20a5e0ea52e9585aa2b8317c2c3bcd90d9aff85 100644
--- a/Programming_Paradigms/bintree_test.py
+++ b/Programming_Paradigms/bintree_test.py
@@ -2,7 +2,7 @@
 # *-* coding:utf-8 *-*
 
 import unittest
-from bintree import *
+from bintree import BinTree, BinTreeNode
 
 if __name__ == "__main__":
     unittest.main()