diff --git a/pytorch_lightning/pt_overrides/override_data_parallel.py b/pytorch_lightning/pt_overrides/override_data_parallel.py
index 522955e86d..89b550fdbb 100644
--- a/pytorch_lightning/pt_overrides/override_data_parallel.py
+++ b/pytorch_lightning/pt_overrides/override_data_parallel.py
@@ -112,7 +112,7 @@ class LightningDistributedDataParallel(DistributedDataParallel):
         return output
 
 
-def parallel_apply(modules, inputs, kwargs_tup=None, devices=None):
+def parallel_apply(modules, inputs, kwargs_tup=None, devices=None):  # pragma: no cover
     r"""Applies each `module` in :attr:`modules` in parallel on arguments
     contained in :attr:`inputs` (positional) and :attr:`kwargs_tup` (keyword)
     on each of :attr:`devices`.
diff --git a/setup.cfg b/setup.cfg
index 01c0b04981..f090474258 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -33,6 +33,7 @@ exclude_lines =
     raise Exception
     warnings
     print
+    raise RuntimeError
 
 omit =
     pytorch_lightning/callbacks/pt_callbacks.py