diff --git a/src/server/utils/__tests__/common.test.ts b/src/server/utils/__tests__/common.test.ts
index 86bbb67..e5738d9 100644
--- a/src/server/utils/__tests__/common.test.ts
+++ b/src/server/utils/__tests__/common.test.ts
@@ -2,7 +2,22 @@ import { describe, expect, test } from 'vitest';
 import { md5 } from '../common.js';
 
 describe('md5', () => {
-  test('normal test', async () => {
-    expect(md5('Hello world')).toBe('3e25960a79dbc69b674cd4ec67a72c62');
+  test('should return the correct md5 hash', () => {
+    const input = 'test';
+    const expectedHash = '098f6bcd4621d373cade4e832627b4f6';
+
+    const result = md5(input);
+
+    expect(result).toEqual(expectedHash);
+  });
+
+  test('should handle different inputs', () => {
+    const input1 = 'hello';
+    const input2 = 'world';
+
+    const result1 = md5(input1);
+    const result2 = md5(input2);
+
+    expect(result1).not.toEqual(result2);
   });
 });