diff --git a/test/ArrayUtilsTest.php b/test/ArrayUtilsTest.php
index 89b4714..f8500d1 100644
--- a/test/ArrayUtilsTest.php
+++ b/test/ArrayUtilsTest.php
@@ -9,9 +9,11 @@
 
 namespace Horde\Util\Test;
 
+use AllowDynamicProperties;
 use PHPUnit\Framework\TestCase;
 use Horde\Util\ArrayUtils;
 
+#[AllowDynamicProperties]
 class ArrayUtilsTest extends TestCase
 {
     public function setUp(): void
diff --git a/test/Unnamespaced/ArrayTest.php b/test/Unnamespaced/ArrayTest.php
index da92c7f..66d2b9a 100644
--- a/test/Unnamespaced/ArrayTest.php
+++ b/test/Unnamespaced/ArrayTest.php
@@ -9,9 +9,11 @@
 
 namespace Horde\Util\Test\Unnamespaced;
 
+use AllowDynamicProperties;
 use PHPUnit\Framework\TestCase;
 use Horde_Array;
 
+#[AllowDynamicProperties]
 class ArrayTest extends TestCase
 {
     public function setUp(): void