diff --git a/tests/repositories/property/test_landlord_override_overlays.py b/tests/repositories/property/test_landlord_override_overlays.py
index 4c4a3403..ce86e78a 100644
--- a/tests/repositories/property/test_landlord_override_overlays.py
+++ b/tests/repositories/property/test_landlord_override_overlays.py
@@ -62,6 +62,21 @@ def test_main_fuel_row_produces_a_heating_fuel_overlay() -> None:
     assert overlays[0].heating.main_fuel_type == 26
 
 
+def test_glazing_row_produces_a_glazing_overlay() -> None:
+    # Arrange
+    overrides = ResolvedPropertyOverrides(
+        rows=(ResolvedPropertyOverride("glazing", 0, "Double glazing, 2002 or later"),)
+    )
+
+    # Act
+    overlays = overlays_from(overrides)
+
+    # Assert
+    assert len(overlays) == 1
+    assert overlays[0].glazing is not None
+    assert overlays[0].glazing.glazing_type == 2
+
+
 def test_unresolvable_rows_are_skipped() -> None:
     # Arrange — an "Unknown" property type and an unmapped wall material.
     overrides = ResolvedPropertyOverrides(