diff --git a/src/pocketmine/level/format/io/LevelProviderManager.php b/src/pocketmine/level/format/io/LevelProviderManager.php
index b79184716..1b42a5eda 100644
--- a/src/pocketmine/level/format/io/LevelProviderManager.php
+++ b/src/pocketmine/level/format/io/LevelProviderManager.php
@@ -44,9 +44,18 @@ abstract class LevelProviderManager{
 	 * @throws \InvalidArgumentException
 	 */
 	public static function addProvider(string $class){
-		if(!is_subclass_of($class, LevelProvider::class)){
-			throw new \InvalidArgumentException("Class is not a subclass of LevelProvider");
+		try{
+			$reflection = new \ReflectionClass($class);
+		}catch(\ReflectionException $e){
+			throw new \InvalidArgumentException("Class $class does not exist");
 		}
+		if(!$reflection->implementsInterface(LevelProvider::class)){
+			throw new \InvalidArgumentException("Class $class does not implement " . LevelProvider::class);
+		}
+		if(!$reflection->isInstantiable()){
+			throw new \InvalidArgumentException("Class $class cannot be constructed");
+		}
+
 		/** @var LevelProvider $class */
 		self::$providers[strtolower($class::getProviderName())] = $class;
 	}