diff --git a/src/lerobot/envs/libero.py b/src/lerobot/envs/libero.py
index 0a45f9d1c..20cf28a1a 100644
--- a/src/lerobot/envs/libero.py
+++ b/src/lerobot/envs/libero.py
@@ -49,7 +49,7 @@ def create_libero_envs(
             n_repeat = n_envs // len(tasks_id)
             print("n_repeat", n_repeat)
             episode_indices = []
-            for i in range(len(tasks_id)):
+            for _ in range(len(tasks_id)):
                 episode_indices.extend(list(range(n_repeat)))
             tasks_id = list(chain.from_iterable([[item] * n_repeat for item in tasks_id]))
         elif n_envs < len(tasks_id):
@@ -90,14 +90,17 @@ def create_libero_envs(
                     f"Creating Libero envs with task ids {tasks_id} from suite {_task}, episode_indices: {episode_indices}"
                 )
                 envs_list = [
-                    lambda i=i: LiberoEnv(
-                        task_suite=task_suite,
-                        task_id=tasks_id,
-                        task_suite_name=_task,
-                        camera_name=camera_name,
-                        init_states=init_states,
-                        episode_index=episode_indices[i],
-                        **gym_kwargs,
+                    (lambda i=i, task_suite=task_suite, tasks_id=tasks_id,
+                            _task=_task, episode_indices=episode_indices:
+                        LiberoEnv(
+                            task_suite=task_suite,
+                            task_id=tasks_id,
+                            task_suite_name=_task,
+                            camera_name=camera_name,
+                            init_states=init_states,
+                            episode_index=episode_indices[i],
+                            **gym_kwargs,
+                        )
                     )
                     for i in range(n_envs)
                 ]
diff --git a/src/lerobot/scripts/train.py b/src/lerobot/scripts/train.py
index a79ac88cd..8e40ce554 100644
--- a/src/lerobot/scripts/train.py
+++ b/src/lerobot/scripts/train.py
@@ -301,8 +301,8 @@ def train(cfg: TrainPipelineConfig):
     if eval_env:
         # added by jade, close all env in multi eval setup
         if cfg.env.multitask_eval:
-            for task_group, envs_dict in eval_env.items():
-                for idx, env in envs_dict.items():
+            for _task_group, envs_dict in eval_env.items():
+                for _idx, env in envs_dict.items():
                     env.close()
         else:
             eval_env.close()