diff --git a/pts/dataset/multivariate_grouper.py b/pts/dataset/multivariate_grouper.py
index 25b88e4..9b2f369 100644
--- a/pts/dataset/multivariate_grouper.py
+++ b/pts/dataset/multivariate_grouper.py
@@ -204,3 +204,4 @@ class MultivariateGrouper:
                 freq=data[FieldName.START].freq,
             ),
         )
+ 
\ No newline at end of file
diff --git a/pts/model/estimator.py b/pts/model/estimator.py
index ee8b4b9..8eba3a6 100644
--- a/pts/model/estimator.py
+++ b/pts/model/estimator.py
@@ -108,7 +108,7 @@ class PTSEstimator(Estimator):
         )
 
         training_data_loader = DataLoader(
-            traning_iter_dataset,
+            training_iter_dataset,
             batch_size=self.trainer.batch_size,
             num_workers=self.train.num_workers,
             pip_memory=self.trainer.pip_memory