diff --git a/baselines/deepq/defaults.py b/baselines/deepq/defaults.py
index 06abdf4..3b32201 100644
--- a/baselines/deepq/defaults.py
+++ b/baselines/deepq/defaults.py
@@ -18,6 +18,6 @@ def atari():
 
 
 defaults = {
-    'atari': atari()
+    'atari': atari(),
     'retro': atari()
 }
diff --git a/baselines/run.py b/baselines/run.py
index d11b9ec..fddc379 100644
--- a/baselines/run.py
+++ b/baselines/run.py
@@ -145,7 +145,6 @@ def get_learn_function_defaults(alg, env_type):
     entry = registry.get(alg)
     assert entry is not None, 'Unregistered algorithm {}'.format(alg)
     return entry['defaults'].get(env_type, {})
-    
 
 
 def parse_cmdline_kwargs(args):
diff --git a/baselines/trpo_mpi/defaults.py b/baselines/trpo_mpi/defaults.py
index 9056a98..32459f9 100644
--- a/baselines/trpo_mpi/defaults.py
+++ b/baselines/trpo_mpi/defaults.py
@@ -30,7 +30,6 @@ def mujoco():
     )
 
 defaults = {
-    'atari': atari(), 
+    'atari': atari(),
     'mujoco': mujoco(),
 }
-