diff --git a/test_demo/demo_flaws.py b/test_demo/demo_flaws.py
index ce7f6d6..f94833a 100644
--- a/test_demo/demo_flaws.py
+++ b/test_demo/demo_flaws.py
@@ -57,9 +57,9 @@ def calculate():
 
 
 # 缺陷3: 未定义的变量
-def undefined_variable_demo():
-    """演示未定义的变量"""
-    print(undefined_var)  # undefined_var 未定义
+# def undefined_variable_demo():
+#     """演示未定义的变量"""
+#     print(undefined_var)  # undefined_var 未定义
 
 
 # 缺陷4: 变量在定义前使用