diff --git a/pytorch_lightning/pt_overrides/override_data_parallel.py b/pytorch_lightning/pt_overrides/override_data_parallel.py
index cf4f476e8a..18bc4162fc 100644
--- a/pytorch_lightning/pt_overrides/override_data_parallel.py
+++ b/pytorch_lightning/pt_overrides/override_data_parallel.py
@@ -28,6 +28,7 @@ class LightningDataParallel(DataParallel):
     """
 
     def parallel_apply(self, replicas, inputs, kwargs):
+        print('parallel_apply called')
         return parallel_apply(replicas, inputs, kwargs, self.device_ids[:len(replicas)])