diff --git a/tests/server.mjs b/tests/server.mjs
index 4101d5c80..a05cf3af1 100644
--- a/tests/server.mjs
+++ b/tests/server.mjs
@@ -16,6 +16,7 @@ export default async function serve(port) {
         throw new Error("Port is required");
     const ws = await LocalWebServer.create({
         port: port,
+        hostname: "127.0.0.1",
         directory: ROOT_DIR,
         corsOpenerPolicy: "same-origin",
         corsEmbedderPolicy: "require-corp",