diff --git a/tests/invariants/test_state_tx_runtime_env.py b/tests/invariants/test_state_tx_runtime_env.py
index c8e954a..d72d868 100644
--- a/tests/invariants/test_state_tx_runtime_env.py
+++ b/tests/invariants/test_state_tx_runtime_env.py
@@ -32,8 +32,8 @@ def test_state_tx_templates_discovered():
     assert {
         "test-validate@1.yaml",
         "frozen-fixture-emit@1.yaml",
-        "bug-ancestor-auto-advance@1.yaml",
     } <= set(_NAMES)
+    assert "bug-ancestor-auto-advance@1.yaml" not in _NAMES  # archived (WT-ANC-15)
 
 
 @pytest.mark.parametrize("name", _NAMES)
@@ -93,7 +93,6 @@ def test_cp_url_templates_discovered():
     assert {
         "test-validate@1.yaml",
         "frozen-fixture-emit@1.yaml",
-        "bug-ancestor-auto-advance@1.yaml",
         "scope-decompose-sonnet@1.yaml",
         "scope-decompose-sonnet@2.yaml",
         "bug-verify-sonnet@1.yaml",