diff --git a/vitest.config.ts b/vitest.config.ts
index b4b3250..ca11782 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -5,7 +5,7 @@ import { getViteConfig } from 'astro/config'
 export default getViteConfig({
 	test: {
 		include: [
-			'./tests/**'
+			'./tests/**.ts'
 		]
 		/* for example, use global to avoid globals imports (describe, test, expect): */
 		// globals: true,