diff --git a/packages/astro/test/custom-404-md.test.js b/packages/astro/test/custom-404-md.nodetest.js
similarity index 75%
rename from packages/astro/test/custom-404-md.test.js
rename to packages/astro/test/custom-404-md.nodetest.js
index a7762004ff..0e668a720a 100644
--- a/packages/astro/test/custom-404-md.test.js
+++ b/packages/astro/test/custom-404-md.nodetest.js
@@ -1,6 +1,7 @@
-import { expect } from 'chai';
 import * as cheerio from 'cheerio';
 import { loadFixture } from './test-utils.js';
+import assert from 'node:assert/strict';
+import { after, describe, before, it } from 'node:test';
 
 describe('Custom 404 Markdown', () => {
 	let fixture;
@@ -27,17 +28,17 @@ describe('Custom 404 Markdown', () => {
 			const html = await fixture.fetch('/').then((res) => res.text());
 			$ = cheerio.load(html);
 
-			expect($('h1').text()).to.equal('Home');
+			assert.strictEqual($('h1').text(), 'Home');
 		});
 
 		it('renders 404 for /abc', async () => {
 			const res = await fixture.fetch('/a');
-			expect(res.status).to.equal(404);
+			assert.strictEqual(res.status, 404);
 
 			const html = await res.text();
 			$ = cheerio.load(html);
 
-			expect($('h1').text()).to.equal('Page not found');
+			assert.strictEqual($('h1').text(), 'Page not found');
 		});
 	});
 });