diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md
index 53d3ba7b0a..bc49ee49a9 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-immediately-invoked-function-expression-iife.english.md
@@ -22,9 +22,9 @@ Rewrite the function <code>makeNest</code> and remove its call so instead it's a
 ```yml
 tests:
   - text: The function should be anonymous.
-    testString: assert(/\(\s*?function\s*?\(\s*?\)\s*?{/.test(code), 'The function should be anonymous.');
+    testString: assert(/\((function|\(\))(=>|\(\)){/.test(code.replace(/\s/g, "")));
   - text: Your function should have parentheses at the end of the expression to call it immediately.
-    testString: assert(/}\s*?\)\s*?\(\s*?\)/.test(code), 'Your function should have parentheses at the end of the expression to call it immediately.');
+    testString: assert(/}\)\(\)/.test(code.replace(/\s/g, "")));
 
 ```