diff --git a/app/__init__.py b/app/__init__.py
index eaf0262..c1de957 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -1 +1,5 @@
 # NeuroBank FastAPI Toolkit
+
+# Import models to ensure they are registered with SQLAlchemy metadata
+# This must be done before database operations that use Base.metadata
+from app import models  # noqa: F401
diff --git a/app/database.py b/app/database.py
index 0b7473c..8a2c12b 100644
--- a/app/database.py
+++ b/app/database.py
@@ -43,9 +43,6 @@ async def get_db() -> AsyncGenerator[AsyncSession, None]:
 
 async def init_db() -> None:
     """Crea las tablas si no existen (útil para desarrollo y tests)."""
-    # Importación tardía para registrar modelos antes de create_all
-    from app import models  # noqa: F401
-
     async with engine.begin() as conn:
         await conn.run_sync(Base.metadata.create_all)