diff --git a/tests/DecoratorTest.php b/tests/DecoratorTest.php
index e21888b..e7ba8e2 100644
--- a/tests/DecoratorTest.php
+++ b/tests/DecoratorTest.php
@@ -29,7 +29,7 @@ public function testBasicArrayAccessItems(): void
             ["created_at" => "2022-11-16 00:00:00"],
             ["created_at" => "2022-11-16 00:00:00"],
             ["created_at" => "2022-11-18 00:00:00"],
-            ["created_at" => "2022-11-19 00:00:00"]
+            ["created_at" => "2022-11-19 00:00:00"],
         ];
 
         $builder = new HeatmapBuilder(