diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md
index f096c314e6..91fc3569a0 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md
@@ -30,7 +30,8 @@ tests:
     testString: assert.deepEqual(steamrollArray([1, [], [3, [[4]]]]), [1, 3, 4]);
   - text: <code>steamrollArray([1, {}, [3, [[4]]]])</code> should return <code>[1, {}, 3, 4]</code>.
     testString: assert.deepEqual(steamrollArray([1, {}, [3, [[4]]]]), [1, {}, 3, 4]);
-
+  - text: Your solution should not use the <code>Array.prototype.flat()</code> or <code>Array.prototype.flatMap()</code> methods.
+    testString: assert(!code.match(/\.flat\([\s\S]*?\)/) && !code.match(/\.flatMap\([\s\S]*?\)/));
 ```
 
 </section>