diff --git a/src/lerobot/policies/pi0/modeling_pi0.py b/src/lerobot/policies/pi0/modeling_pi0.py
index 450fe25ce..a8ae83c95 100644
--- a/src/lerobot/policies/pi0/modeling_pi0.py
+++ b/src/lerobot/policies/pi0/modeling_pi0.py
@@ -60,8 +60,7 @@ class ActionSelectKwargs(TypedDict, total=False):
 
 
 def _gated_residual(residual: torch.Tensor, hidden_states: torch.Tensor, gate: torch.Tensor) -> torch.Tensor:
-    """Gated residual connection: residual + gate * hidden_states.
-    """
+    """Gated residual connection: residual + gate * hidden_states."""
     return residual + gate.unsqueeze(-1) * hidden_states
 
 
diff --git a/src/lerobot/policies/pi05/modeling_pi05.py b/src/lerobot/policies/pi05/modeling_pi05.py
index 2b0965e39..d5be17079 100644
--- a/src/lerobot/policies/pi05/modeling_pi05.py
+++ b/src/lerobot/policies/pi05/modeling_pi05.py
@@ -59,8 +59,7 @@ class ActionSelectKwargs(TypedDict, total=False):
 
 
 def _gated_residual(residual: torch.Tensor, hidden_states: torch.Tensor, gate: torch.Tensor) -> torch.Tensor:
-    """Gated residual connection: residual + gate * hidden_states.
-    """
+    """Gated residual connection: residual + gate * hidden_states."""
     return residual + gate.unsqueeze(-1) * hidden_states
 
 
diff --git a/src/lerobot/policies/wall_x/qwen_model/qwen2_5_vl_moe.py b/src/lerobot/policies/wall_x/qwen_model/qwen2_5_vl_moe.py
index d0091a83d..a1309ea9a 100644
--- a/src/lerobot/policies/wall_x/qwen_model/qwen2_5_vl_moe.py
+++ b/src/lerobot/policies/wall_x/qwen_model/qwen2_5_vl_moe.py
@@ -30,6 +30,7 @@ from transformers.utils import (
 
 from .configuration_qwen2_5_vl import Qwen2_5_VLConfig, Qwen2_5_VLVisionConfig
 
+
 # TODO(Steven): SlidingWindowCache was removed in transformers v5. Define a placeholder so isinstance checks
 # always return False (which is the correct behavior when no sliding window cache is in use).
 class _SlidingWindowCachePlaceholder: