diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9d4aa2a4..a36a73dc 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.3, 7.4, 8.0, 8.1]
+        php: [7.3, 7.4, 8.0, 8.1, 8.2]
 
     name: PHP ${{ matrix.php }}
 
diff --git a/src/Support/ClosureStream.php b/src/Support/ClosureStream.php
index b54558b8..9f3ef6c8 100644
--- a/src/Support/ClosureStream.php
+++ b/src/Support/ClosureStream.php
@@ -2,6 +2,7 @@
 
 namespace Laravel\SerializableClosure\Support;
 
+#[\AllowDynamicProperties]
 class ClosureStream
 {
     /**
diff --git a/tests/ReflectionClosure1Test.php b/tests/ReflectionClosure1Test.php
index c8ed62e5..bc564f14 100644
--- a/tests/ReflectionClosure1Test.php
+++ b/tests/ReflectionClosure1Test.php
@@ -276,9 +276,9 @@
 
 test('interpolation1', function () {
     $f1 = function () {
-        return "${foo}${bar}{$foobar}";
+        return "{$foo}{$bar}{$foobar}";
     };
     $e1 = 'function () {
-        return "${foo}${bar}{$foobar}";
+        return "{$foo}{$bar}{$foobar}";
     }';
 });
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];