diff --git a/tests/data/invalid.json b/tests/data/invalid.json
index 5594980..ed6b517 100644
--- a/tests/data/invalid.json
+++ b/tests/data/invalid.json
@@ -19,7 +19,7 @@
     }
   ],
   "metadata": {
-    "created_at": "2019-10-21T18:57:03+01:00",
-    "updated_at": "2019-10-21T18:57:03+01:00"
+    "created_at": "2019-10-21T18:57:03+0100",
+    "updated_at": "2019-10-21T18:57:03+0100"
   }
 }
diff --git a/tests/data/valid.json b/tests/data/valid.json
index 9b70338..5dcbabb 100644
--- a/tests/data/valid.json
+++ b/tests/data/valid.json
@@ -20,7 +20,7 @@
     }
   ],
   "metadata": {
-    "created_at": "2019-10-21T18:57:03+01:00",
-    "updated_at": "2019-10-21T18:57:03+01:00"
+    "created_at": "2019-10-21T18:57:03+0100",
+    "updated_at": "2019-10-21T18:57:03+0100"
   }
 }