diff --git a/flatland/core/env.py b/flatland/core/env.py
index 263ae73ca55f1191aab87436a1589af30adda693..fccaaa8375fd2d9b5524e585034c43b1435a3bcb 100644
--- a/flatland/core/env.py
+++ b/flatland/core/env.py
@@ -4,6 +4,7 @@ The base Environment class is adapted from rllib.env.MultiAgentEnv
 (https://github.com/ray-project/ray).
 """
 
+
 class Environment:
     """Base interface for multi-agent environments in Flatland.