diff --git a/gym-unity/gym_unity/envs/__init__.py b/gym-unity/gym_unity/envs/__init__.py
index 3cb2210e0b..58a7f73f07 100644
--- a/gym-unity/gym_unity/envs/__init__.py
+++ b/gym-unity/gym_unity/envs/__init__.py
@@ -298,10 +298,6 @@ def metadata(self):
     def reward_range(self) -> Tuple[float, float]:
         return -float("inf"), float("inf")
 
-    @property
-    def spec(self):
-        return None
-
     @property
     def action_space(self):
         return self._action_space