diff --git a/test/backend/assets/test_png.json b/test/backend/assets/test_png.json
index d42156c2..5cc83c27 100644
--- a/test/backend/assets/test_png.json
+++ b/test/backend/assets/test_png.json
@@ -18,7 +18,7 @@
       },
       "name": "leaf"
     }
-  ]
+  ],
   "fileSize": 4381,
   "orientation": 1,
   "size": {