diff --git a/datatypes/epc/domain/tests/test_from_sap_schema.py b/datatypes/epc/domain/tests/test_from_sap_schema.py
index 1f6afae2..0612f523 100644
--- a/datatypes/epc/domain/tests/test_from_sap_schema.py
+++ b/datatypes/epc/domain/tests/test_from_sap_schema.py
@@ -127,6 +127,15 @@ class TestFromSapSchema17_1RebaselineFields:
         assert result.secondary_heating is not None
         assert result.secondary_heating.description == "None"
 
+    def test_maps_assessment_type(self) -> None:
+        # Full-SAP certs lodge assessment_type "SAP"; carried for provenance and
+        # the property-details panel, mirroring from_rdsap_schema_17_1.
+        schema = from_dict(SapSchema17_1, load("sap_17_1.json"))
+
+        result = EpcPropertyDataMapper.from_sap_schema_17_1(schema)
+
+        assert result.assessment_type == "SAP"
+
 
 class TestFullSapHasHotWaterCylinderFallback:
     """Some full-SAP certs (e.g. SAP-Schema-17.0 cert 8265-7433-3220-9736-7902)