diff --git a/test_runner/regress/test_branching.py b/test_runner/regress/test_branching.py
index 011c6896bd..ce9bb1c8b5 100644
--- a/test_runner/regress/test_branching.py
+++ b/test_runner/regress/test_branching.py
@@ -157,6 +157,7 @@ def test_cannot_create_endpoint_on_non_uploaded_timeline(neon_env_builder: NeonE
         [
             ".*request{method=POST path=/v1/tenant/.*/timeline request_id=.*}: request was dropped before completing.*",
             ".*page_service_conn_main.*: query handler for 'basebackup .* ERROR: Not found: Timeline",
+            ".*request failed with Unavailable: Timeline .* is not active",
         ]
     )
     ps_http = env.pageserver.http_client()
@@ -194,7 +195,7 @@ def test_cannot_create_endpoint_on_non_uploaded_timeline(neon_env_builder: NeonE
 
         env.neon_cli.mappings_map_branch(initial_branch, env.initial_tenant, env.initial_timeline)
 
-        with pytest.raises(RuntimeError, match="ERROR: Not found: Timeline"):
+        with pytest.raises(RuntimeError, match=f"Timeline {env.initial_tenant}/{env.initial_timeline} is not active"):
             env.endpoints.create_start(
                 initial_branch, tenant_id=env.initial_tenant, basebackup_request_tries=2
             )