diff --git a/pytorch_lightning/pt_overrides/override_data_parallel.py b/pytorch_lightning/pt_overrides/override_data_parallel.py
index 98cc0ed871..55540f9a20 100644
--- a/pytorch_lightning/pt_overrides/override_data_parallel.py
+++ b/pytorch_lightning/pt_overrides/override_data_parallel.py
@@ -1,6 +1,4 @@
-from itertools import chain
 from torch.nn import DataParallel
-import pdb
 
 import threading
 import torch
@@ -70,10 +68,14 @@ def parallel_apply(modules, inputs, kwargs_tup=None, devices=None):
                 if not isinstance(input, (list, tuple)):
                     input = (input,)
 
+                # ---------------
+                # CHANGE
                 if module.training:
                     return module.training_step(*input, **kwargs)
                 else:
                     return module.validation_step(*input, **kwargs)
+                # ---------------
+
             with lock:
                 results[i] = output
         except Exception as e: