diff --git a/src/__tests__/html.test.ts b/src/__tests__/html.test.ts
index 45f264b..412ebf2 100644
--- a/src/__tests__/html.test.ts
+++ b/src/__tests__/html.test.ts
@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { escapeHtml } from '../utils/html';
+import { escapeHtml } from '../utils/html.js';
 
 describe('escapeHtml', () => {
   it('escapes ampersands', () => {