diff --git a/tests/condition/parsing/test_calico_parser.py b/tests/condition/parsing/test_calico_parser.py
index 563b7394e..f8ca9e557 100644
--- a/tests/condition/parsing/test_calico_parser.py
+++ b/tests/condition/parsing/test_calico_parser.py
@@ -40,6 +40,27 @@ def _workbook(rows: List[List[object]]) -> BytesIO:
     return buffer
 
 
+def test_calico_parser_drops_na_sentinel_covering_rows():
+    # Arrange -- Calico writes the literal string "N/A" for a placeholder row
+    # (no roof-covering record captured), not an empty cell.
+    workbook = _workbook(
+        [
+            [443, "HOUSE", "31 Venice Avenue", "Roof Covering", "Concrete Tiles",
+             date(1998, 4, 1), 55, 36],
+            [438, "FLAT", "137 Brownhill Avenue", "Roof Covering", "N/A",
+             date(2000, 4, 1), 0, 973],
+        ]
+    )
+    parser = CalicoParser(FakeUprnLookup({"443": 100093305101, "438": 100093388053}))
+
+    # Act
+    properties = parser.parse(workbook)
+
+    # Assert
+    references = [asset.asset_reference for prop in properties for asset in prop.assets]
+    assert references == [443]
+
+
 def test_calico_parser_drops_rows_with_no_covering_type():
     # Arrange
     workbook = _workbook(