diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 0000000..7e0c9dd
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['test/**/*.ts'],
+  },
+});