diff --git a/src/EntityManager.php b/src/EntityManager.php
index bb9e2ad2ced..8045ac2f5e3 100644
--- a/src/EntityManager.php
+++ b/src/EntityManager.php
@@ -63,27 +63,27 @@ class EntityManager implements EntityManagerInterface
     /**
      * The metadata factory, used to retrieve the ORM metadata of entity classes.
      */
-    private readonly ClassMetadataFactory $metadataFactory;
+    private ClassMetadataFactory $metadataFactory;
 
     /**
      * The UnitOfWork used to coordinate object-level transactions.
      */
-    private readonly UnitOfWork $unitOfWork;
+    private UnitOfWork $unitOfWork;
 
     /**
      * The event manager that is the central point of the event system.
      */
-    private readonly EventManager $eventManager;
+    private EventManager $eventManager;
 
     /**
      * The proxy factory used to create dynamic proxies.
      */
-    private readonly ProxyFactory $proxyFactory;
+    private ProxyFactory $proxyFactory;
 
     /**
      * The repository factory used to create dynamic repositories.
      */
-    private readonly RepositoryFactory $repositoryFactory;
+    private RepositoryFactory $repositoryFactory;
 
     /**
      * The expression builder instance used to generate query expressions.
@@ -112,8 +112,8 @@ class EntityManager implements EntityManagerInterface
      * @param Connection $conn The database connection used by the EntityManager.
      */
     public function __construct(
-        private readonly Connection $conn,
-        private readonly Configuration $config,
+        private Connection $conn,
+        private Configuration $config,
         EventManager|null $eventManager = null,
     ) {
         if (! $config->getMetadataDriverImpl()) {
diff --git a/tests/Tests/EntityManagerTest.php b/tests/Tests/EntityManagerTest.php
new file mode 100644
index 00000000000..96d43795e8e
--- /dev/null
+++ b/tests/Tests/EntityManagerTest.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\UnitOfWork;
+use PHPUnit\Framework\TestCase;
+use ReflectionProperty;
+use Symfony\Component\VarExporter\LazyGhostTrait;
+
+class EntityManagerTest extends TestCase
+{
+    public function testLazyGhostEntityManager(): void
+    {
+        $em = new class () extends EntityManager {
+            use LazyGhostTrait;
+
+            public function __construct()
+            {
+            }
+        };
+
+        $em = $em::createLazyGhost(static function ($em): void {
+            $r = new ReflectionProperty(EntityManager::class, 'unitOfWork');
+            $r->setValue($em, new class () extends UnitOfWork {
+                public function __construct()
+                {
+                }
+
+                public function clear(): void
+                {
+                }
+            });
+        });
+
+        $this->assertTrue($em->isOpen());
+        $em->close();
+        $this->assertFalse($em->isOpen());
+
+        $em->resetLazyObject();
+        $this->assertTrue($em->isOpen());
+    }
+}