diff --git a/src/Persistence/AbstractManagerRegistry.php b/src/Persistence/AbstractManagerRegistry.php
index ce27d99f..a2ce0383 100644
--- a/src/Persistence/AbstractManagerRegistry.php
+++ b/src/Persistence/AbstractManagerRegistry.php
@@ -31,15 +31,15 @@ abstract class AbstractManagerRegistry implements ManagerRegistry
     private $defaultManager;
 
     /**
-     * @var string
-     * @phpstan-var class-string
+     * @var string|null
+     * @phpstan-var class-string|null
      */
     private $proxyInterfaceName;
 
     /**
      * @param array<string, string> $connections
      * @param array<string, string> $managers
-     * @phpstan-param class-string $proxyInterfaceName
+     * @phpstan-param class-string|null $proxyInterfaceName Set to null when native lazy objects are used.
      */
     public function __construct(
         string $name,
@@ -47,7 +47,7 @@ public function __construct(
         array $managers,
         string $defaultConnection,
         string $defaultManager,
-        string $proxyInterfaceName
+        ?string $proxyInterfaceName = null
     ) {
         $this->name               = $name;
         $this->connections        = $connections;
@@ -177,7 +177,7 @@ public function getManagerForClass(string $class)
             return null;
         }
 
-        if ($proxyClass->implementsInterface($this->proxyInterfaceName)) {
+        if ($this->proxyInterfaceName !== null && $proxyClass->implementsInterface($this->proxyInterfaceName)) {
             $parentClass = $proxyClass->getParentClass();
 
             if ($parentClass === false) {
diff --git a/tests/Persistence/ManagerRegistryTest.php b/tests/Persistence/ManagerRegistryTest.php
index 96177557..1cf13cb1 100644
--- a/tests/Persistence/ManagerRegistryTest.php
+++ b/tests/Persistence/ManagerRegistryTest.php
@@ -154,6 +154,24 @@ public function testGetRepositoryWithManagerDetection(): void
         self::assertSame($repository, $this->mr->getRepository(OtherTestObject::class));
     }
 
+    public function testNoProxyClass(): void
+    {
+        $mr = new TestManagerRegistry(
+            'ORM',
+            ['default' => 'default_connection'],
+            ['default' => 'default_manager'],
+            'default',
+            'default',
+            null,
+            $this->getManagerFactory()
+        );
+
+        self::assertInstanceOf(
+            ObjectManager::class,
+            $mr->getManagerForClass(TestObject::class)
+        );
+    }
+
     private function getManagerFactory(): Closure
     {
         return function (string $name) {
@@ -185,7 +203,7 @@ class TestManagerRegistry extends AbstractManagerRegistry
     /**
      * {@inheritDoc}
      *
-     * @phpstan-param class-string $proxyInterfaceName
+     * @phpstan-param class-string|null $proxyInterfaceName
      */
     public function __construct(
         string $name,
@@ -193,7 +211,7 @@ public function __construct(
         array $managers,
         string $defaultConnection,
         string $defaultManager,
-        string $proxyInterfaceName,
+        ?string $proxyInterfaceName,
         callable $managerFactory
     ) {
         $this->managerFactory = $managerFactory;