diff --git a/tests/CoreStubsTest.php b/tests/CoreStubsTest.php
index a0f2bfd282d..d1149f1b38a 100644
--- a/tests/CoreStubsTest.php
+++ b/tests/CoreStubsTest.php
@@ -102,7 +102,7 @@ public function providerValidCodeParse(): iterable
             'php_version' => '8.0',
         ];
         yield 'sprintf yields a non-empty-string for non-empty-string value' => [
-            '<?php
+            'code' => '<?php
 
             /**
              * @param non-empty-string $foo
@@ -115,13 +115,13 @@ function foo(string $foo): string
             ',
         ];
         yield 'sprintf yields a string for possible empty string param' => [
-            '<?php
+            'code' => '<?php
 
             $a = sprintf("%s", "");
             ',
             'assertions' => [
                 '$a===' => 'string',
-            ]
+            ],
         ];
     }
 }