diff --git a/app.js b/app.js
index c68de67..da62cb7 100644
--- a/app.js
+++ b/app.js
@@ -31,7 +31,7 @@ io.on('connection', (socket) => {
 		name = (name || "").trim()
 
 		//if name is empty(null), do nothing
-		if(!name) return socket.emit('user invalid', {username: `${name} is invalid.`});
+		if(!name) return socket.emit('user invalid', `This user name is invalid.`);
 		
 		//if username is not taken
 		else if(rooms[0].users.indexOf(name) == -1) {
diff --git a/package.json b/package.json
index 74e26e7..167d51a 100644
--- a/package.json
+++ b/package.json
@@ -5,12 +5,12 @@
   "main": "index.js",
   "scripts": {
     "start": "node app.js",
-    "test:watch": "mocha --watch ./*.test.js",
-    "test": "mocha ./*.test.js"
+    "test:watch": "mocha --watch ./tests/**/*.test.js",
+    "test": "mocha ./tests/**/*.test.js"
   },
   "engines": {
     "npm": "3.10.10",
-    "node": "12.19.0"
+    "node": "6.9.4"
   },
   "repository": {
     "type": "git",
@@ -27,8 +27,8 @@
     "socket.io": "^1.7.2"
   },
   "devDependencies": {
-    "chai": "^4.2.0",
-    "mocha": "^8.2.0",
-    "socket.io-client": "^2.3.1"
+    "chai": "4.2.0",
+    "mocha": "6.2.3",
+    "socket.io-client": "2.3.1"
   }
 }
diff --git a/app.test.js b/tests/app.test.js
similarity index 94%
rename from app.test.js
rename to tests/app.test.js
index bcb0b77..16d5eee 100644
--- a/app.test.js
+++ b/tests/app.test.js
@@ -34,9 +34,8 @@ describe("App.js", () => {
       assert.isTrue(client.connected);
 
       client.on("user invalid", (data) => {
-        assert.isObject(data);
-        assert.hasAllKeys(data, "username");
-        assert.strictEqual(data.username, " is invalid.");
+        assert.isString(data);
+        assert.strictEqual(data, "This user name is invalid.");
         done();
       });