diff --git a/loop.py b/loop.py
index 6d1f001..b2d8162 100644
--- a/loop.py
+++ b/loop.py
@@ -191,7 +191,7 @@ class AutoLoopCalculatorTTSBatch:
         _log(f"   -> 📜 Texto a procesar: {current_chunk_text[:75]}...")
         _log(f"{'='*50}\n")
 
-        return ([current_chunk_text], [safe_index], [total_chunks], [current_name], ["\n".join(log_output)])
+        return (current_chunk_text, safe_index, total_chunks, current_name, "\n".join(log_output))
 
 @register_node
 class AutoLoopCalculatorLTX:
diff --git a/test_loop_syntax.py b/test_loop_syntax.py
index 3449fd2..9b2b59a 100644
--- a/test_loop_syntax.py
+++ b/test_loop_syntax.py
@@ -8,14 +8,16 @@ sys.modules['comfy.model_management'] = unittest.mock.MagicMock()
 sys.modules['folder_paths'] = unittest.mock.MagicMock()
 
 # Mock internal import to prevent syntax error on register_node
-class DummyRegister:
-    def __call__(self, cls):
-        return cls
-
-sys.modules['__main__'].register_node = DummyRegister()
+import types
+dummy_module = types.ModuleType("dummy")
+dummy_module.register_node = lambda c: c
+sys.modules[__package__ or '.'] = dummy_module
 
 try:
-    import loop
+    with open('loop.py') as f:
+        code = f.read()
+    code = code.replace('from . import register_node', 'def register_node(c): return c')
+    exec(code)
     print("Syntax is OK")
 except Exception as e:
     import traceback