diff --git a/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/review-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md b/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/review-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md
index ee4e9445e20..da437c30c35 100644
--- a/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/review-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md
+++ b/curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/review-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md
@@ -23,23 +23,25 @@ assert.lengthOf(diceValuesArr, 5);
 When your `rollDiceBtn` is clicked a second time, your `diceValuesArr` array should contain only five new elements.
 
 ```js
-__setRandom();
+const __mocker = new __helpers.RandomMocker();
 try {
+  __mocker.mock();
   rollDiceBtn.click();
   const old = [...diceValuesArr];
   rollDiceBtn.click();
   assert.lengthOf(diceValuesArr, 5);
   assert.notDeepEqual(old, diceValuesArr);
 } finally {
-  __restoreRandom();
+  __mocker.restore();
 }
 ```
 
 Each of your random numbers should be between 1 and 6 inclusive.
 
 ```js
-__setRandom();
+const __mocker = new __helpers.RandomMocker();
 try {
+  __mocker.mock();
   for (let i = 1; i < 20; i++) {
     rollDiceBtn.click();
     for (const val of diceValuesArr) {
@@ -48,7 +50,7 @@ try {
     }
   } 
 } finally {
-  __restoreRandom();
+  __mocker.restore();
 }
 
 ```
@@ -62,30 +64,6 @@ assert.deepEqual(numbers, diceValuesArr);
 
 # --seed--
 
-## --before-user-code--
-
-```js
-const __oldRandom = Math.random;
-const __createRandom = () => {
-  let seed = 42;
-  const a = 1664525;
-  const c = 1013904223;
-  const mod = 2**32;
-  return () => {
-    seed = (a * seed + c) % mod;
-    return seed / mod;
-  };
-};
-
-const __setRandom = () => {
-  Math.random = __createRandom();
-};
-
-const __restoreRandom = () => {
-  Math.random = __oldRandom;
-};
-```
-
 ## --seed-contents--
 
 ```html