diff --git a/tests/domain/magicplan/test_mapper.py b/tests/domain/magicplan/test_mapper.py
index d81a448cf..b429df70f 100644
--- a/tests/domain/magicplan/test_mapper.py
+++ b/tests/domain/magicplan/test_mapper.py
@@ -255,3 +255,17 @@ def test_trickle_vent_area_read_from_legacy_field_label() -> None:
     # Assert
     assert vent is not None
     assert vent.trickle_vent_area_mm2 == 1700
+
+
+def test_trickle_vent_area_read_from_individual_field_label() -> None:
+    # Arrange — "Individual" variant used in some MagicPlan templates
+    fields = [_make_survey_field(
+        "Individual Trickle Vent Effective Area (mm2) (No Code Then Width x Height)", "900"
+    )]
+
+    # Act
+    vent = _map_window_ventilation(fields)
+
+    # Assert
+    assert vent is not None
+    assert vent.trickle_vent_area_mm2 == 900