diff --git a/infrastructure/epc_client/tests/test_mapper_corpus.py b/infrastructure/epc_client/tests/test_mapper_corpus.py
index ca8c06b4..a8a00bcf 100644
--- a/infrastructure/epc_client/tests/test_mapper_corpus.py
+++ b/infrastructure/epc_client/tests/test_mapper_corpus.py
@@ -7,7 +7,7 @@ scripts/eon/harvest_certs.py. Each line is one cert in the exact shape
 
   * 21.0.0 / 21.0.1       — supported today; these are a regression guard.
   * 20.0.0                — pre-SAP10 Reduced-Field Synthesis (ADR-0027).
-  * 19.0 / 18.0 / 17.1    — pre-SAP10 family, inherited coefficients (ADR-0028).
+  * 19.0/18.0/17.1/17.0   — pre-SAP10 family, inherited coefficients (ADR-0028).
                             All 1000 certs each parse and map; the strict guard
                             below keeps the whole bucket honest.
 
@@ -32,6 +32,7 @@ SUPPORTED = {
     "RdSAP-Schema-19.0",
     "RdSAP-Schema-18.0",
     "RdSAP-Schema-17.1",
+    "RdSAP-Schema-17.0",
 }
 
 
@@ -66,19 +67,6 @@ def test_supported_schemas_map(cert: dict[str, Any]) -> None:
     assert isinstance(result, EpcPropertyData)
 
 
-def test_rdsap_17_0_maps() -> None:
-    # Arrange
-    certs = _load("RdSAP-Schema-17.0")
-    if not certs:
-        pytest.skip("no RdSAP-Schema-17.0 corpus harvested")
-
-    # Act
-    result = EpcPropertyDataMapper.from_api_response(certs[0])
-
-    # Assert
-    assert isinstance(result, EpcPropertyData)
-
-
 def test_rdsap_19_0_synthesises_windows_for_windowless_cert() -> None:
     """ADR-0028 Reduced-Field Synthesis: a reduced 19.0 cert lodges no
     per-window geometry, only a glazed_area band — the mapper synthesises a