diff --git a/src/lib/index.test.ts b/src/lib/index.test.ts
index dbc9154..b6aa671 100644
--- a/src/lib/index.test.ts
+++ b/src/lib/index.test.ts
@@ -1,4 +1,4 @@
-import safePath from '$lib';
+import { safePath, timedExecution } from '$lib';
 import { describe, it, expect } from 'vitest';
 
 describe('safe path', () => {
@@ -30,3 +30,21 @@ describe('safe path', () => {
 		expect(safePath('./uplodas', '..foobar..')).toBe(true);
 	});
 });
+
+describe('timedExecution', () => {
+	const asyncIdentity = async (v) => v;
+	const identity = (v) => v;
+
+	it('works with async', async () => {
+		const { executionTime, result } = await timedExecution(() => asyncIdentity(5));
+		expect(result).toBe(5);
+		// execution time is always positive
+		expect(executionTime).toBeGreaterThanOrEqual(0);
+	});
+	it('works with sync', async () => {
+		const { executionTime, result } = await timedExecution(() => identity(5));
+		expect(result).toBe(5);
+		// execution time is always positive
+		expect(executionTime).toBeGreaterThanOrEqual(0);
+	});
+});