diff --git a/src/IlluminateRegistry.php b/src/IlluminateRegistry.php
index 2edddb61..e3085737 100644
--- a/src/IlluminateRegistry.php
+++ b/src/IlluminateRegistry.php
@@ -330,8 +330,8 @@ public function getManagerForClass(string $className, bool $throwExceptionIfNotF
                 // @codeCoverageIgnoreEnd
             }
 
-            foreach ($entityManager->getMetadataFactory()->getAllMetadata() as $metadata) {
-                if ($metadata->getName() === $className) {
+            foreach ($entityManager->getConfiguration()->getMetadataDriverImpl()->getAllClassNames() as $_className) {
+                if ($_className === $className) {
                     return $entityManager;
                 }
             }