diff --git a/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-basic-debugging-by-building-a-random-background-color-changer/66326913b729e16dd0127a36.md b/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-basic-debugging-by-building-a-random-background-color-changer/66326913b729e16dd0127a36.md
index eaa7ee92b70..442fd281970 100644
--- a/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-basic-debugging-by-building-a-random-background-color-changer/66326913b729e16dd0127a36.md
+++ b/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-basic-debugging-by-building-a-random-background-color-changer/66326913b729e16dd0127a36.md
@@ -22,6 +22,8 @@ Once you fix that final bug, the random background color changer will be complet
 You should not call the `changeBackgroundColor` function. Instead, assign the function reference to the `onclick` property.
 
 ```js
+assert.strictEqual(typeof btn.onclick, 'function');
+assert.strictEqual(typeof changeBackgroundColor, 'function');
 assert.strictEqual(btn.onclick, changeBackgroundColor);
 ```