diff --git a/tests/applications/landlord_description_overrides/test_build_columns.py b/tests/applications/landlord_description_overrides/test_build_columns.py
index 02feaab6..c6748728 100644
--- a/tests/applications/landlord_description_overrides/test_build_columns.py
+++ b/tests/applications/landlord_description_overrides/test_build_columns.py
@@ -25,3 +25,16 @@ def test_build_columns_wires_a_main_fuel_classifier_column() -> None:
     assert len(columns) == 1
     assert columns[0].name == "main_fuel"
     assert columns[0].source_column == "Main Fuel"
+
+
+def test_build_columns_wires_a_glazing_classifier_column() -> None:
+    # Arrange
+    chat_gpt = cast(ChatGPT, object())
+
+    # Act
+    columns = _build_columns({"glazing": "Glazing"}, chat_gpt, None)
+
+    # Assert — one column, named glazing, reading the "Glazing" header.
+    assert len(columns) == 1
+    assert columns[0].name == "glazing"
+    assert columns[0].source_column == "Glazing"