diff --git a/tests/WidgetTest/DbTest.php b/tests/WidgetTest/DbTest.php
index <HASH>..<HASH> 100644
--- a/tests/WidgetTest/DbTest.php
+++ b/tests/WidgetTest/DbTest.php
@@ -288,9 +288,13 @@ class DbTest extends TestCase
         $user = $query->find();
 
         $this->assertEquals("SELECT * FROM users u ORDER BY id ASC", $query->getSQL());
-        $this->assertEquals("1", $user->id);
+        $this->assertEquals('1', $user->id);
 
         // addOrder
+        $query = $this->db('users')->orderBy('id', 'ASC')->addOrderBy('group_id', 'ASC');
+        $user = $query->find();
 
+        $this->assertEquals("SELECT * FROM users u ORDER BY id ASC, group_id ASC", $query->getSQL());
+        $this->assertEquals('1', $user->id);
     }
 }
\ No newline at end of file
added test for addOrderby method, ref #<I>