diff --git a/tests/astro.ts b/tests/astro.ts
index 803c27d0..d73c7b78 100644
--- a/tests/astro.ts
+++ b/tests/astro.ts
@@ -5,6 +5,7 @@ export async function test(options: RunOptions) {
 	await runInRepo({
 		...options,
 		repo: 'withastro/astro',
+		branch: 'vite-3',
 		build: 'build:ci',
 		test: 'test:vite-ci'
 	})