diff --git a/stable_baselines3/cmaes/cmaes.py b/stable_baselines3/cmaes/cmaes.py
index 54aa633..90ea639 100644
--- a/stable_baselines3/cmaes/cmaes.py
+++ b/stable_baselines3/cmaes/cmaes.py
@@ -176,7 +176,6 @@ class CMAES(BaseAlgorithm):
                     else:
                         break
 
-
             callback.on_rollout_end()
 
             # TODO: inject best solution from time to time?