diff --git a/test_demo/demo_flaws.py b/test_demo/demo_flaws.py
index 57a7308..ce7f6d6 100644
--- a/test_demo/demo_flaws.py
+++ b/test_demo/demo_flaws.py
@@ -34,7 +34,7 @@ def long_line():
 def missing_spaces():
     """缺少必要空格"""
     x=1+2
-    y=3*4
+    y=3*99
     if x==1:
         print(x)