diff --git a/src/Symfony/Component/Runtime/Internal/ComposerPlugin.php b/src/Symfony/Component/Runtime/Internal/ComposerPlugin.php
index 77c48b3f0b380..8247b858e66b5 100644
--- a/src/Symfony/Component/Runtime/Internal/ComposerPlugin.php
+++ b/src/Symfony/Component/Runtime/Internal/ComposerPlugin.php
@@ -18,7 +18,6 @@
 use Composer\Plugin\PluginInterface;
 use Composer\Script\ScriptEvents;
 use Symfony\Component\Filesystem\Filesystem;
-use Symfony\Component\Runtime\RuntimeInterface;
 use Symfony\Component\Runtime\SymfonyRuntime;
 
 /**
@@ -98,10 +97,6 @@ public function updateAutoloadFile(): void
 
         $runtimeClass = $extra['class'] ?? SymfonyRuntime::class;
 
-        if (SymfonyRuntime::class !== $runtimeClass && !is_subclass_of($runtimeClass, RuntimeInterface::class)) {
-            throw new \InvalidArgumentException(sprintf('Class "%s" listed under "extra.runtime.class" in your composer.json file '.(class_exists($runtimeClass) ? 'should implement "%s".' : 'not found.'), $runtimeClass, RuntimeInterface::class));
-        }
-
         unset($extra['class'], $extra['autoload_template']);
 
         $code = strtr(file_get_contents($autoloadTemplate), [