diff --git a/egs/librispeech/ASR/conformer_ctc/train.py b/egs/librispeech/ASR/conformer_ctc/train.py
index c2b9c1fb6..223c8d993 100755
--- a/egs/librispeech/ASR/conformer_ctc/train.py
+++ b/egs/librispeech/ASR/conformer_ctc/train.py
@@ -503,7 +503,9 @@ def train_one_epoch(
                 loss_info.write_summary(
                     tb_writer, "train/current_", params.batch_idx_train
                 )
-                tot_loss.write_summary(tb_writer, "train/tot_", params.batch_idx_train)
+                tot_loss.write_summary(
+                    tb_writer, "train/tot_", params.batch_idx_train
+                )
 
         if batch_idx > 0 and batch_idx % params.valid_interval == 0:
             logging.info("Computing validation loss")
@@ -617,7 +619,9 @@ def run(rank, world_size, args):
 
         cur_lr = optimizer._rate
         if tb_writer is not None:
-            tb_writer.add_scalar("train/learning_rate", cur_lr, params.batch_idx_train)
+            tb_writer.add_scalar(
+                "train/learning_rate", cur_lr, params.batch_idx_train
+            )
             tb_writer.add_scalar("train/epoch", epoch, params.batch_idx_train)
 
         if rank == 0: