diff --git a/tests/configs/modules/helloworld/helloworld_default.js b/tests/configs/modules/helloworld/helloworld_default.js
index d04f2884..9d516aef 100644
--- a/tests/configs/modules/helloworld/helloworld_default.js
+++ b/tests/configs/modules/helloworld/helloworld_default.js
@@ -3,8 +3,7 @@
  * By Rodrigo Ramírez Norambuena https://rodrigoramirez.com
  * MIT Licensed.
  */
-
-var config = {
+let config = {
 	port: 8080,
 	ipWhitelist: ["127.0.0.1", "::ffff:127.0.0.1", "::1"],
 
diff --git a/tests/e2e/modules/helloworld_spec.js b/tests/e2e/modules/helloworld_spec.js
index 21e33985..6a744e51 100644
--- a/tests/e2e/modules/helloworld_spec.js
+++ b/tests/e2e/modules/helloworld_spec.js
@@ -8,7 +8,7 @@ const afterEach = global.afterEach;
 describe("Test helloworld module", function () {
 	helpers.setupTimeout(this);
 
-	var app = null;
+	let app = null;
 
 	beforeEach(function () {
 		return helpers