diff --git a/system/Test/PhpStreamWrapper.php b/system/Test/PhpStreamWrapper.php
index 6bbb4d144b6b..9ef3d7d4398c 100644
--- a/system/Test/PhpStreamWrapper.php
+++ b/system/Test/PhpStreamWrapper.php
@@ -20,6 +20,11 @@
  */
 final class PhpStreamWrapper
 {
+    /**
+     * @var resource|null
+     */
+    public $context;
+
     private static string $content = '';
     private int $position          = 0;