diff --git a/pytorch_lightning/testing_models/lm_test_module.py b/pytorch_lightning/testing_models/lm_test_module.py
index c0843667..09c12c4d 100644
--- a/pytorch_lightning/testing_models/lm_test_module.py
+++ b/pytorch_lightning/testing_models/lm_test_module.py
@@ -18,7 +18,7 @@ class LightningTestModel(LightningModule):
     Sample model to show how to define a template
     """
 
-    def __init__(self, hparams, force_remove_distributed_sampler):
+    def __init__(self, hparams, force_remove_distributed_sampler=False):
         """
         Pass in parsed HyperOptArgumentParser to the model
         :param hparams: