diff --git a/src/imitation/policies/obs_update_wrapper.py b/src/imitation/policies/obs_update_wrapper.py
index 93f2a57ca..4c79e694a 100644
--- a/src/imitation/policies/obs_update_wrapper.py
+++ b/src/imitation/policies/obs_update_wrapper.py
@@ -103,7 +103,7 @@ def _update_ob(
 def _remove_hr_obs(
     obs: Union[np.ndarray, Dict[str, np.ndarray]],
 ) -> Union[np.ndarray, Dict[str, np.ndarray]]:
-    """Removes rgb observation from the observation."""
+    """Removes the human readable observation if any."""
     if not isinstance(obs, dict):
         return obs
     if data_wrappers.HR_OBS_KEY not in obs:
diff --git a/tests/policies/test_obs_update_wrapper.py b/tests/policies/test_obs_update_wrapper.py
index cdc79ad28..2f18c7d4e 100644
--- a/tests/policies/test_obs_update_wrapper.py
+++ b/tests/policies/test_obs_update_wrapper.py
@@ -47,7 +47,7 @@ def test_remove_hr(use_hr_wrapper: bool):
             {"a": np.array([1])},
         ),
         (
-            "dict rgb removed successfully and got unwrapped from dict",
+            "dict hr removed successfully and got unwrapped from dict",
             {
                 "a": np.array([1]),
                 HR_OBS_KEY: np.array([3]),
@@ -55,7 +55,7 @@ def test_remove_hr(use_hr_wrapper: bool):
             np.array([1]),
         ),
         (
-            "dict rgb removed successfully and got dict",
+            "dict hr removed successfully and got dict",
             {
                 "a": np.array([1]),
                 "b": np.array([2]),
@@ -68,7 +68,7 @@ def test_remove_hr(use_hr_wrapper: bool):
         ),
     ],
 )
-def test_remove_rgb_ob(testname, obs, expected_obs):
+def test_remove_hr_ob(testname, obs, expected_obs):
     got_obs = _remove_hr_obs(obs)
     assert type(got_obs) is type(expected_obs)
     if isinstance(got_obs, (Dict, gym.spaces.Dict)):
@@ -79,12 +79,12 @@ def test_remove_rgb_ob(testname, obs, expected_obs):
         assert got_obs == expected_obs
 
 
-def test_remove_rgb_obs_failure():
+def test_remove_hr_obs_failure():
     with pytest.raises(ValueError, match="Only human readable observation*"):
         _remove_hr_obs({HR_OBS_KEY: np.array([1])})
 
 
-def test_remove_rgb_obs_still_keep_origin_space_rgb():
+def test_remove_hr_obs_still_keep_origin_space_rgb():
     obs = {"a": np.array([1]), HR_OBS_KEY: np.array([2])}
     _remove_hr_obs(obs)
     assert HR_OBS_KEY in obs