diff --git a/tutorials/SB3/kaz/sb3_kaz_vector.py b/tutorials/SB3/kaz/sb3_kaz_vector.py
index b4336d7de..6f5e84283 100644
--- a/tutorials/SB3/kaz/sb3_kaz_vector.py
+++ b/tutorials/SB3/kaz/sb3_kaz_vector.py
@@ -98,8 +98,8 @@ def eval(env_fn, num_games: int = 100, render_mode: str | None = None, **env_kwa
         for agent in env.agent_iter():
             obs, reward, termination, truncation, info = env.last()
 
-            for agent in env.agents:
-                rewards[agent] += env.rewards[agent]
+            for a in env.agents:
+                rewards[a] += env.rewards[a]
 
             if termination or truncation:
                 break
diff --git a/tutorials/SB3/pistonball/sb3_pistonball_vector.py b/tutorials/SB3/pistonball/sb3_pistonball_vector.py
index 3acab9bd2..c3323e213 100644
--- a/tutorials/SB3/pistonball/sb3_pistonball_vector.py
+++ b/tutorials/SB3/pistonball/sb3_pistonball_vector.py
@@ -99,8 +99,8 @@ def eval(env_fn, num_games: int = 100, render_mode: str | None = None, **env_kwa
             obs, reward, termination, truncation, info = env.last()
 
             if termination or truncation:
-                for agent in env.agents:
-                    rewards[agent] += env.rewards[agent]
+                for a in env.agents:
+                    rewards[a] += env.rewards[a]
                 break
             else:
                 act = model.predict(obs, deterministic=True)[0]
diff --git a/tutorials/SB3/waterworld/sb3_waterworld_vector.py b/tutorials/SB3/waterworld/sb3_waterworld_vector.py
index 60bb62934..74390e52d 100644
--- a/tutorials/SB3/waterworld/sb3_waterworld_vector.py
+++ b/tutorials/SB3/waterworld/sb3_waterworld_vector.py
@@ -78,8 +78,8 @@ def eval(env_fn, num_games: int = 100, render_mode: str | None = None, **env_kwa
         for agent in env.agent_iter():
             obs, reward, termination, truncation, info = env.last()
 
-            for agent in env.agents:
-                rewards[agent] += env.rewards[agent]
+            for a in env.agents:
+                rewards[a] += env.rewards[a]
             if termination or truncation:
                 break
             else: