diff --git a/src/Symfony/Component/ErrorHandler/DebugClassLoader.php b/src/Symfony/Component/ErrorHandler/DebugClassLoader.php
index 2ecf9d0cdc224..b6ad33a632dd3 100644
--- a/src/Symfony/Component/ErrorHandler/DebugClassLoader.php
+++ b/src/Symfony/Component/ErrorHandler/DebugClassLoader.php
@@ -20,6 +20,7 @@
 use PHPUnit\Framework\MockObject\MockObject;
 use Prophecy\Prophecy\ProphecySubjectInterface;
 use ProxyManager\Proxy\ProxyInterface;
+use Symfony\Component\DependencyInjection\Argument\LazyClosure;
 use Symfony\Component\ErrorHandler\Internal\TentativeTypes;
 use Symfony\Component\VarExporter\LazyObjectInterface;
 
@@ -259,6 +260,7 @@ public static function checkClasses(): bool
                     && !is_subclass_of($symbols[$i], LegacyProxy::class)
                     && !is_subclass_of($symbols[$i], MockInterface::class)
                     && !is_subclass_of($symbols[$i], IMock::class)
+                    && !(is_subclass_of($symbols[$i], LazyClosure::class) && str_contains($symbols[$i], "@anonymous\0"))
                 ) {
                     $loader->checkClass($symbols[$i]);
                 }