diff --git a/aviary/mission/gasp_based/ode/unsteady_solved/test/test_unsteady_alpha_thrust_iter_group.py b/aviary/mission/gasp_based/ode/unsteady_solved/test/test_unsteady_alpha_thrust_iter_group.py
index 97f8b5d36..483ee4a07 100644
--- a/aviary/mission/gasp_based/ode/unsteady_solved/test/test_unsteady_alpha_thrust_iter_group.py
+++ b/aviary/mission/gasp_based/ode/unsteady_solved/test/test_unsteady_alpha_thrust_iter_group.py
@@ -104,7 +104,7 @@ def _test_unsteady_alpha_thrust_iter_group(self, ground_roll=False):
         assert_check_partials(cpd, atol=1e-10, rtol=1e-10)
 
     def test_iter_group(self):
-        # TODO: why not ground_roll in [True] ?
+        # issue #494: why not ground_roll in [True] ?
         for ground_roll in [False]:
             with self.subTest(msg=f"ground_roll={ground_roll}"):
                 self._test_unsteady_alpha_thrust_iter_group(ground_roll=ground_roll)