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diff --git a/packages/astro/test/css-order-import.test.js b/packages/astro/test/css-order-import.test.js
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+++ b/packages/astro/test/css-order-import.test.js
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+import { expect } from 'chai';
+import * as cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('CSS ordering - import order', () => {
+	/** @type {import('./test-utils').Fixture} */
+	let fixture;
+	before(async () => {
+		fixture = await loadFixture({
+			root: './fixtures/css-order-import/',
+		});
+	});
+
+	/**
+	 * 
+	 * @param {string} html 
+	 * @returns {string[]}
+	 */
+	function getLinks(html) {
+		let $ = cheerio.load(html);
+		let out = [];
+		$('link[rel=stylesheet]').each((i, el) => {
+			out.push($(el).attr('href'));
+		});
+		return out;
+	}
+
+	function getStyles(html) {
+		let $ = cheerio.load(html);
+		let out = [];
+		$('style').each((i, el) => {
+			out.push($(el).text());
+		});
+		return out;
+	}
+
+	/**
+	 *
+	 * @param {string} href
+	 * @returns {Promise<{ href: string; css: string; }>}
+	 */
+	async function getLinkContent(href) {
+		const css = await fixture.readFile(href);
+		return { href, css };
+	}
+
+	describe('Development', () => {
+		/** @type {import('./test-utils').DevServer} */
+		let devServer;
+
+		before(async () => {
+			devServer = await fixture.startDevServer();
+		});
+
+		after(async () => {
+			await devServer.stop();
+		});
+
+		it('Page level CSS is defined lower in the page', async () => {
+			let res = await fixture.fetch('/');
+			let html = await res.text();
+			let [style1, style2] = getStyles(html);
+
+			expect(style1).to.include('green');
+			expect(style2).to.include('salmon');
+		});
+
+		it('import order is depth-first', async () => {
+			let res = await fixture.fetch('/component/');
+			let html = await res.text();
+			let [style1, style2, style3] = getStyles(html);
+
+			expect(style1).to.include('burlywood');
+			expect(style2).to.include('aliceblue');
+			expect(style3).to.include('whitesmoke');
+		});
+	});
+
+	describe('Production', () => {
+		before(async () => {
+			await fixture.build();
+		});
+
+		it('Page level CSS is defined lower in the page', async () => {
+			let html = await fixture.readFile('/index.html');
+
+			const content = await Promise.all(
+				getLinks(html).map((href) => getLinkContent(href))
+			);
+
+			const [{ css }] = content;
+			let idx1 = css.indexOf('salmon');
+			let idx2 = css.indexOf('green');
+
+			expect(idx1).to.be.greaterThan(idx2, 'Page level CSS should be placed after imported CSS');
+		});
+
+		it('import order is depth-first', async () => {
+			let html = await fixture.readFile('/component/index.html');
+
+			const content = await Promise.all(
+				getLinks(html).map((href) => getLinkContent(href))
+			);
+
+			const [{ css }] = content;
+			let idx1 = css.indexOf('whitesmoke');
+			let idx2 = css.indexOf('aliceblue');
+			let idx3 = css.indexOf('burlywood');
+
+			expect(idx1).to.be.greaterThan(idx2);
+			expect(idx2).to.be.greaterThan(idx3);
+		});
+	});
+});