diff --git a/reasoning_gym/cognition/rubiks_cube.py b/reasoning_gym/cognition/rubiks_cube.py
index 471a714a..bf6c34ac 100644
--- a/reasoning_gym/cognition/rubiks_cube.py
+++ b/reasoning_gym/cognition/rubiks_cube.py
@@ -62,8 +62,7 @@ class RubiksCubeDataset(ProceduralDataset):
             "metadata": {
                 "cube_size": self.config.cube_size,
                 "scramble_steps": self.config.scramble_steps,
-                "scramble_moves": scramble_moves,
-                "cube_string": str(cube),
+                "scramble_moves": ' '.join([str(move) for move in scramble_moves]),
                 "example_correct_answer": actions_string,
             },
         }
diff --git a/tests/test_rubikscube.py b/tests/test_rubikscube.py
index 379b7f09..d6431442 100644
--- a/tests/test_rubikscube.py
+++ b/tests/test_rubikscube.py
@@ -31,7 +31,6 @@ def test_rubikscube_items():
 
         # Check metadata contains required fields
         assert "cube_size" in item["metadata"]
-        assert "cube_string" in item["metadata"]
         assert "cube_size" in item["metadata"]
         assert "scramble_steps" in item["metadata"]
         assert "scramble_moves" in item["metadata"]