diff --git a/curriculum/challenges/english/25-front-end-development/workshop-cat-painting/646ce9d790d2a44de5f99e04.md b/curriculum/challenges/english/25-front-end-development/workshop-cat-painting/646ce9d790d2a44de5f99e04.md
index 9876c6dd360..2f6959531c7 100644
--- a/curriculum/challenges/english/25-front-end-development/workshop-cat-painting/646ce9d790d2a44de5f99e04.md
+++ b/curriculum/challenges/english/25-front-end-development/workshop-cat-painting/646ce9d790d2a44de5f99e04.md
@@ -14,37 +14,37 @@ Create two `div` elements, the first inside the `.cat-left-ear` element with a c
 You should not change the existing `div` element with the class `cat-left-ear`.
 
 ```js
-assert(document.querySelectorAll('div.cat-left-ear').length === 1);
+assert.lengthOf(document.querySelectorAll('div.cat-left-ear'), 1);
 ```
 
 You should not change the existing `div` element with the class `cat-right-ear`.
 
 ```js
-assert(document.querySelectorAll('div.cat-right-ear').length === 1);
+assert.lengthOf(document.querySelectorAll('div.cat-right-ear'), 1);
 ```
 
 You should have one `div` element inside your `.cat-left-ear` element.
 
 ```js
-assert(document.querySelectorAll('.cat-left-ear div').length === 1);
+assert.lengthOf(document.querySelectorAll('.cat-left-ear div'), 1);
 ```
 
 You should have one `div` element inside your `.cat-right-ear` element.
 
 ```js
-assert(document.querySelectorAll('.cat-right-ear div').length === 1);
+assert.lengthOf(document.querySelectorAll('.cat-right-ear div'), 1);
 ```
 
 The new `div` element inside `.cat-left-ear` should have the class `cat-left-inner-ear`.
 
 ```js
-assert(document.querySelectorAll('.cat-left-ear div')[0]?.classList.contains('cat-left-inner-ear'));
+assert.isTrue(document.querySelectorAll('.cat-left-ear div')[0]?.classList.contains('cat-left-inner-ear'));
 ```
 
 The new `div` element inside `.cat-right-ear` should have the class `cat-right-inner-ear`.
 
 ```js
-assert(document.querySelectorAll('.cat-right-ear div')[0]?.classList.contains('cat-right-inner-ear'));
+assert.isTrue(document.querySelectorAll('.cat-right-ear div')[0]?.classList.contains('cat-right-inner-ear'));
 ```
 
 # --seed--