diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.md
index 6a042167527..ab1f85159f4 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/return-a-sorted-array-without-changing-the-original-array.md
@@ -40,7 +40,7 @@ assert(
 `nonMutatingSort(globalArray)` should not be hard coded.
 
 ```js
-assert(!nonMutatingSort.toString().match(/[23569]/g));
+assert(!nonMutatingSort.toString().match(/\[.*?[23569].*?\]/gs));
 ```
 
 The function should return a new array, not the array passed to it.