diff --git a/src/Ratchet/App.php b/src/Ratchet/App.php
index 3833fff8..6bf86e9f 100644
--- a/src/Ratchet/App.php
+++ b/src/Ratchet/App.php
@@ -93,7 +93,7 @@ public function __construct($httpHost = 'localhost', $port = 8080, $address = '1
         if (80 == $port) {
             $flashUri = '0.0.0.0:843';
         } else {
-            $flashUri = 8843;
+            $flashUri = '127.0.0.1:8843';
         }
 
         // prefer SocketServer (reactphp/socket v1.9+) over legacy \React\Socket\Server
diff --git a/tests/unit/AppTest.php b/tests/unit/AppTest.php
index 7e058e38..b3c879e3 100644
--- a/tests/unit/AppTest.php
+++ b/tests/unit/AppTest.php
@@ -3,6 +3,7 @@
 
 use PHPUnit\Framework\TestCase;
 use Ratchet\App;
+use Ratchet\Server\IoServer;
 
 class AppTest extends TestCase {
     public function testCtorThrowsForInvalidLoop() {
@@ -14,4 +15,22 @@ public function testCtorThrowsForInvalidLoop() {
         }
         new App('localhost', 8080, '127.0.0.1', 'loop');
     }
+
+    public function testCtorWithoutArgumentsStartsListeningOnDefaultPorts() {
+        if (@stream_socket_server('127.0.0.1:8080') === false || @stream_socket_server('127.0.0.1:8843') === false) {
+            $this->markTestSkipped('Default socket port 8080 or 8843 not available or already in use');
+        }
+        $app = new App();
+
+        $ref = new \ReflectionProperty($app, '_server');
+        $ref->setAccessible(true);
+        $server = $ref->getValue($app);
+        assert($server instanceof IoServer);
+
+        $this->assertStringMatchesFormat('%S127.0.0.1:8080', $server->socket->getAddress());
+        $this->assertStringMatchesFormat('%S127.0.0.1:8843', $app->flashServer->socket->getAddress());
+
+        $server->socket->close();
+        $app->flashServer->socket->close();
+    }
 }