diff --git a/test/cors.test.js b/test/cors.test.js
index fa53e1f..8819277 100644
--- a/test/cors.test.js
+++ b/test/cors.test.js
@@ -709,7 +709,7 @@ test('Allow only request from a specific origin using regex', t => {
   t.plan(8)
 
   const fastify = Fastify()
-  fastify.register(cors, { origin: /(example|other)\.com/gi })
+  fastify.register(cors, { origin: /(?:example|other)\.com/giu })
 
   fastify.get('/', (req, reply) => {
     reply.send('ok')