diff --git a/tests/FunctionCallTest.php b/tests/FunctionCallTest.php
index 4ecce5dbb..d10530d9b 100644
--- a/tests/FunctionCallTest.php
+++ b/tests/FunctionCallTest.php
@@ -1256,17 +1256,6 @@ class FunctionCallTest extends TestCase
                     '$a' => 'int',
                 ]
             ],
-            'jsonEncodeString' => [
-                '<?php
-                    $a = json_decode("hello");
-                    $b = json_decode("hello", true);
-                    $c = json_decode("hello", false);',
-                [
-                    '$a' => 'array<int, array<int, array<array-key, mixed>|null|scalar|stdClass>|null|scalar|stdClass>|null|scalar|stdClass',
-                    '$b' => 'array<array-key, array<array-key, array<array-key, mixed>|null|scalar>|null|scalar>|null|scalar',
-                    '$c' => 'array<int, array<int, array<array-key, mixed>|null|scalar|stdClass>|null|scalar|stdClass>|null|scalar|stdClass',
-                ]
-            ],
         ];
     }