diff --git a/examples/two_arm_robot.py b/examples/two_arm_robot.py
index 4355787..2011d41 100644
--- a/examples/two_arm_robot.py
+++ b/examples/two_arm_robot.py
@@ -53,7 +53,6 @@ def step(self, timestep: dm_env.TimeStep) -> np.ndarray:
   right = params.RobotParams(attach_site=right_frame,
                              name='right',
                              control_frame=control_frame)
-  env_params = params.EnvirontmentParameters(mjcf_root=arena)
   panda_env = environment.PandaEnvironment([left, right], arena)
 
   with panda_env.build_task_environment() as env: