diff --git a/supersuit/vector/single_vec_env.py b/supersuit/vector/single_vec_env.py
index bbb1b80..4bb105c 100644
--- a/supersuit/vector/single_vec_env.py
+++ b/supersuit/vector/single_vec_env.py
@@ -6,6 +6,7 @@ class SingleVecEnv:
     def __init__(self, gym_env_fns, *args):
         assert len(gym_env_fns) == 1
         self.gym_env = gym_env_fns[0]()
+        self.render_mode = self.gym_env.render_mode
         self.observation_space = self.gym_env.observation_space
         self.action_space = self.gym_env.action_space
         self.num_envs = 1
diff --git a/test/dummy_aec_env.py b/test/dummy_aec_env.py
index ae2f209..dd07186 100644
--- a/test/dummy_aec_env.py
+++ b/test/dummy_aec_env.py
@@ -9,7 +9,7 @@ def __init__(self, observations, observation_spaces, action_spaces):
         super().__init__()
         self._observations = observations
         self._observation_spaces = observation_spaces
-
+        self.render_mode = None
         self.agents = sorted([x for x in observation_spaces.keys()])
         self.possible_agents = self.agents[:]
         self._agent_selector = agent_selector(self.agents)