diff --git a/tests/Util/JsonTest.php b/tests/Util/JsonTest.php
index 04eaf7aaeb0..406d765f716 100644
--- a/tests/Util/JsonTest.php
+++ b/tests/Util/JsonTest.php
@@ -60,6 +60,7 @@ public function prettifyProvider()
     {
         return [
             ['{"name":"John","age": "5"}', "{\n    \"name\": \"John\",\n    \"age\": \"5\"\n}"],
+            ['{"url":"https://www.example.com/"}', "{\n    \"url\": \"https://www.example.com/\"\n}"],
         ];
     }