diff --git a/src/Support/ClosureStream.php b/src/Support/ClosureStream.php
index 57625fec..9f3ef6c8 100644
--- a/src/Support/ClosureStream.php
+++ b/src/Support/ClosureStream.php
@@ -2,6 +2,7 @@
 
 namespace Laravel\SerializableClosure\Support;
 
+#[\AllowDynamicProperties]
 class ClosureStream
 {
     /**
@@ -37,13 +38,6 @@ class ClosureStream
      */
     protected $pointer = 0;
 
-    /**
-     * The stream context.
-     *
-     * @var string
-     */
-    public $context;
-
     /**
      * Opens file or URL.
      *
diff --git a/tests/SerializerTest.php b/tests/SerializerTest.php
index 49445cf3..75287396 100644
--- a/tests/SerializerTest.php
+++ b/tests/SerializerTest.php
@@ -317,7 +317,7 @@ function () {
 
 test('mixed encodings', function () {
     $a = iconv('utf-8', 'utf-16', 'Düsseldorf');
-    $b = utf8_decode('Düsseldorf');
+    $b = mb_convert_encoding('Düsseldorf', 'ISO-8859-1', 'UTF-8');
 
     $closure = function () use ($a, $b) {
         return [$a, $b];