diff --git a/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal.py b/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal.py
index d2ff30d481..302cfe1237 100644
--- a/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal.py
+++ b/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal.py
@@ -282,7 +282,12 @@ def check_trial_start_redirect(args: argparse.Namespace, auth_headers: dict[str,
     return CheckResult(
         name="self-hosted-trial-redirect-to-hosted",
         ok=True,
-        detail=f"returned action_url={action_url}",
+        detail=(
+            "returned hosted handoff action_url="
+            f"{action_url}; this rehearsal covers the `409 trial_signup_required` "
+            "branch only, while the later `429 trial_rate_limited` plus "
+            "`Retry-After` branch stays owned by the local trial-start proofs"
+        ),
     )
 
 
diff --git a/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal_test.py b/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal_test.py
index d83d656a4c..05501542ad 100644
--- a/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal_test.py
+++ b/scripts/release_control/internal/hosted_signup_billing_replay_rehearsal_test.py
@@ -91,6 +91,10 @@ class HostedSignupBillingReplayRehearsalTest(unittest.TestCase):
                 results = mod.run_rehearsal(args)
 
             self.assertTrue(all(result.ok for result in results), [r.detail for r in results])
+            redirect_result = next(result for result in results if result.name == "self-hosted-trial-redirect-to-hosted")
+            self.assertIn("trial_signup_required", redirect_result.detail)
+            self.assertIn("trial_rate_limited", redirect_result.detail)
+            self.assertIn("Retry-After", redirect_result.detail)
             trial_headers = next(headers for _method, url, headers in fetch_json_calls if url.endswith("/api/license/trial/start"))
             self.assertEqual(trial_headers["X-API-Token"], "token")
             webhook_headers = next(headers for _method, url, headers, _body in fetch_calls if url.endswith("/api/stripe/webhook"))