diff --git a/src/lerobot/envs/configs.py b/src/lerobot/envs/configs.py
index b7dc030b5..5c648de70 100644
--- a/src/lerobot/envs/configs.py
+++ b/src/lerobot/envs/configs.py
@@ -19,7 +19,7 @@ from typing import Any
 import draccus
 
 from lerobot.configs.types import FeatureType, PolicyFeature
-from lerobot.constants import ACTION, OBS_ENV_STATE, OBS_IMAGE, OBS_IMAGE_2, OBS_IMAGES, OBS_STATE
+from lerobot.constants import ACTION, OBS_ENV_STATE, OBS_IMAGE, OBS_IMAGES, OBS_STATE
 from lerobot.robots import RobotConfig
 from lerobot.teleoperators.config import TeleoperatorConfig
 
diff --git a/src/lerobot/envs/utils.py b/src/lerobot/envs/utils.py
index 4ac17cdf2..2cf9efcfe 100644
--- a/src/lerobot/envs/utils.py
+++ b/src/lerobot/envs/utils.py
@@ -26,6 +26,7 @@ from lerobot.configs.types import FeatureType, PolicyFeature
 from lerobot.envs.configs import EnvConfig
 from lerobot.utils.utils import get_channel_first_image_shape
 
+
 def preprocess_observation(observations: dict[str, np.ndarray]) -> dict[str, Tensor]:
     # TODO(aliberts, rcadene): refactor this to use features from the environment (no hardcoding)
     """Convert environment observation to LeRobot format observation.
@@ -79,6 +80,7 @@ def preprocess_observation(observations: dict[str, np.ndarray]) -> dict[str, Ten
 
     return return_observations
 
+
 def env_to_policy_features(env_cfg: EnvConfig) -> dict[str, PolicyFeature]:
     # TODO(aliberts, rcadene): remove this hardcoding of keys and just use the nested keys as is
     # (need to also refactor preprocess_observation and externalize normalization from policies)
diff --git a/src/lerobot/scripts/eval.py b/src/lerobot/scripts/eval.py
index 98a19c94e..f52c8c70e 100644
--- a/src/lerobot/scripts/eval.py
+++ b/src/lerobot/scripts/eval.py
@@ -460,6 +460,7 @@ def _compile_episode_data(
 
     return data_dict
 
+
 @parser.wrap()
 def eval_main(cfg: EvalPipelineConfig):
     logging.info(pformat(asdict(cfg)))