diff --git a/dead-code/exercise-1.js b/dead-code/exercise-1.js
index 4d09f15fa9..f257d5c6b6 100644
--- a/dead-code/exercise-1.js
+++ b/dead-code/exercise-1.js
@@ -1,17 +1,28 @@
 // Find the instances of unreachable and redundant code - remove them!
 // The sayHello function should continue to work for any reasonable input it's given.
 
-let testName = "Jerry";
+// let testName = "Jerry";
+// const greeting = "hello";
+
+// function sayHello(greeting, name) {
+//   const greetingStr = greeting + ", " + name + "!";
+//   return `${greeting}, ${name}!`;
+//   console.log(greetingStr);
+// }
+
+// testName = "Aman";
+
+// const greetingMessage = sayHello(greeting, testName);
+
+// console.log(greetingMessage); // 'hello, Aman!'
+
 const greeting = "hello";
+const testName = "Aman";
 
 function sayHello(greeting, name) {
-  const greetingStr = greeting + ", " + name + "!";
   return `${greeting}, ${name}!`;
-  console.log(greetingStr);
 }
 
-testName = "Aman";
-
 const greetingMessage = sayHello(greeting, testName);
 
 console.log(greetingMessage); // 'hello, Aman!'
diff --git a/dead-code/exercise-2.js b/dead-code/exercise-2.js
index 56d7887c4c..d14a7cf60d 100644
--- a/dead-code/exercise-2.js
+++ b/dead-code/exercise-2.js
@@ -1,14 +1,36 @@
 // Remove the unused code that does not contribute to the final console log
 // The countAndCapitalisePets function should continue to work for any reasonable input it's given, and you shouldn't modify the pets variable.
 
+// const pets = ["parrot", "hamster", "horse", "dog", "hamster", "cat", "hamster"];
+// const capitalisedPets = pets.map((pet) => pet.toUpperCase());
+// const petsStartingWithH = pets.filter((pet) => pet[0] === "h");
+
+// function logPets(petsArr) {
+//   petsArr.forEach((pet) => console.log(pet));
+// }
+
+// function countAndCapitalisePets(petsArr) {
+//   const petCount = {};
+
+//   petsArr.forEach((pet) => {
+//     const capitalisedPet = pet.toUpperCase();
+//     if (petCount[capitalisedPet]) {
+//       petCount[capitalisedPet] += 1;
+//     } else {
+//       petCount[capitalisedPet] = 1;
+//     }
+//   });
+//   return petCount;
+// }
+
+// const countedPetsStartingWithH = countAndCapitalisePets(petsStartingWithH);
+
+// console.log(countedPetsStartingWithH); // { 'HAMSTER': 3, 'HORSE': 1 } <- Final console log
+
+
 const pets = ["parrot", "hamster", "horse", "dog", "hamster", "cat", "hamster"];
-const capitalisedPets = pets.map((pet) => pet.toUpperCase());
 const petsStartingWithH = pets.filter((pet) => pet[0] === "h");
 
-function logPets(petsArr) {
-  petsArr.forEach((pet) => console.log(pet));
-}
-
 function countAndCapitalisePets(petsArr) {
   const petCount = {};
 
@@ -25,4 +47,4 @@ function countAndCapitalisePets(petsArr) {
 
 const countedPetsStartingWithH = countAndCapitalisePets(petsStartingWithH);
 
-console.log(countedPetsStartingWithH); // { 'HAMSTER': 3, 'HORSE': 1 } <- Final console log
+console.log(countedPetsStartingWithH); // { 'HAMSTER': 3, 'HORSE': 1 }
diff --git a/test-driven-development/fizzbuzz.js b/test-driven-development/fizzbuzz.js
new file mode 100644
index 0000000000..12198b29fb
--- /dev/null
+++ b/test-driven-development/fizzbuzz.js
@@ -0,0 +1,10 @@
+function fizzbuzz(number){
+  if (number % 3 === 0 && number % 5 === 0){
+    return "fizzbuzz";
+  } else if (number % 5 === 0){
+    return "buzz";
+  } else if (number % 3 === 0){
+    return "fizz";
+  }
+  return number.toString();
+};
\ No newline at end of file
diff --git a/test-driven-development/fizzbuzz.test.js b/test-driven-development/fizzbuzz.test.js
new file mode 100644
index 0000000000..e48f231494
--- /dev/null
+++ b/test-driven-development/fizzbuzz.test.js
@@ -0,0 +1,36 @@
+import {fizzbuzz} from './fizzbuzz.js';
+import assert from 'node:assert';
+import {test, describe} from 'node:test';
+
+describe('division by 3 and 5', () => { 
+
+    test('15 returns fizzbuzz', () => {
+        assert.equal(fizzbuzz(15), "fizzbuzz");
+    });
+
+    test('30 returns fizzbuzz', () => {
+        assert.equal(fizzbuzz(30), "fizzbuzz");
+    });
+
+    test('90 returns fizzbuzz', () => {
+        assert.equal(fizzbuzz(90), "fizzbuzz");
+    });
+
+});
+
+
+describe('returning the number as a string', () => { 
+
+    test('1 returns "1"', () => {
+        assert.equal(fizzbuzz(1), "1");
+    });
+
+    test('4 returns "4"', () => {
+        assert.equal(fizzbuzz(4), "4");
+    });
+
+    test('91 returns "91"', () => {
+        assert.equal(fizzbuzz(91), "91");
+    });
+
+});
\ No newline at end of file