diff --git a/examples/basic-math/src/arithmetic.js b/examples/basic-math/src/arithmetic.js
index ae36902..9204bff 100644
--- a/examples/basic-math/src/arithmetic.js
+++ b/examples/basic-math/src/arithmetic.js
@@ -1,4 +1,6 @@
-export const add = () => {};
+export const add = (a, b) => {
+  return a + b;
+};
 
 export const subtract = () => {};
 
diff --git a/examples/basic-math/src/arithmetic.test.js b/examples/basic-math/src/arithmetic.test.js
index a863ed7..b9689bb 100644
--- a/examples/basic-math/src/arithmetic.test.js
+++ b/examples/basic-math/src/arithmetic.test.js
@@ -1,6 +1,11 @@
 import { describe, it, expect } from 'vitest';
+import { add } from './arithmetic.js';
 
-describe.todo('add', () => {});
+describe('add', () => {
+  it('should add two positive numbers', () => {
+    expect(add(2, 2)).toBe(4);
+  });
+});
 
 describe.todo('subtract', () => {});
 
diff --git a/examples/scratchpad/index.js b/examples/scratchpad/index.js
deleted file mode 100644
index 725147d..0000000
--- a/examples/scratchpad/index.js
+++ /dev/null
@@ -1,5 +0,0 @@
-import { it, expect } from 'vitest';
-
-it('is a super simple test', () => {
-  expect(true).toBe(true);
-});