diff --git a/tests/Autoloader.php b/tests/Autoloader.php
index 3e4fb27..3194eea 100755
--- a/tests/Autoloader.php
+++ b/tests/Autoloader.php
@@ -59,7 +59,7 @@ final class Autoloader
      */
     public static function addPath(string $path) : void
     {
-        self::$paths[] = $path;
+        self::$paths[] = \rtrim($path, '/\\') . '/';
     }
 
     /**