diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.md
index 373d97e2bd..3c5cb464e6 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/decrement-a-number-with-javascript.md
@@ -38,9 +38,13 @@ assert(myVar === 10);
 `myVar = myVar - 1;` should be changed.
 
 ```js
-assert(
-  /let\s*myVar\s*=\s*11;\s*\/*.*\s*([-]{2}\s*myVar|myVar\s*[-]{2});/.test(code)
-);
+assert(!code.match(/myVar\s*=\s*myVar\s*[-]\s*1.*?;?/));
+```
+
+You should not assign `myVar` with `10`.
+
+```js
+assert(!code.match(/myVar\s*=\s*10.*?;?/));
 ```
 
 You should use the `--` operator on `myVar`.