diff --git a/script/grasp_ball.py b/script/grasp_ball.py
index e501969d..af88f5a2 100644
--- a/script/grasp_ball.py
+++ b/script/grasp_ball.py
@@ -1,5 +1,3 @@
-from hpp import Transform
-from hpp.corbaserver.manipulation import ConstraintGraph, Constraints
 from manipulation import (
     Ground,
     PathPlayer,  # noqa: F401
@@ -11,6 +9,9 @@
     vf,
 )
 
+from hpp import Transform
+from hpp.corbaserver.manipulation import ConstraintGraph, Constraints
+
 vf.loadEnvironmentModel(Ground, "ground")
 vf.loadObjectModel(Pokeball, "pokeball")
 robot.setJointBounds(
diff --git a/script/grasp_ball_in_box.py b/script/grasp_ball_in_box.py
index 16f3341c..2950a93b 100644
--- a/script/grasp_ball_in_box.py
+++ b/script/grasp_ball_in_box.py
@@ -1,5 +1,3 @@
-from hpp.corbaserver import Client  # noqa: F401
-from hpp.corbaserver.manipulation import ConstraintGraph
 from manipulation import (
     Box,
     Ground,
@@ -10,6 +8,9 @@
     vf,
 )
 
+from hpp.corbaserver import Client  # noqa: F401
+from hpp.corbaserver.manipulation import ConstraintGraph
+
 vf.loadEnvironmentModel(Ground, "ground")
 vf.loadEnvironmentModel(Box, "box")
 vf.moveObstacle("box/base_link_0", [0.3 + 0.04, 0, 0.04, 0, 0, 0, 1])
diff --git a/script/rrt.py b/script/rrt.py
index 9eecb7f1..b15c38f6 100644
--- a/script/rrt.py
+++ b/script/rrt.py
@@ -1,7 +1,8 @@
+from motion_planner import MotionPlanner
+
 from hpp.corbaserver import Client, ProblemSolver
 from hpp.corbaserver.practicals.ur5 import Robot
 from hpp.gepetto import PathPlayer, ViewerFactory  # noqa: F401
-from motion_planner import MotionPlanner
 
 Client().problem.resetProblem()