diff --git a/tests/repositories/property/test_landlord_override_overlays.py b/tests/repositories/property/test_landlord_override_overlays.py
index 385d2f355..e35034ebc 100644
--- a/tests/repositories/property/test_landlord_override_overlays.py
+++ b/tests/repositories/property/test_landlord_override_overlays.py
@@ -201,3 +201,27 @@ def test_a_fuel_override_contradicting_the_heating_archetype_is_logged(
 
     # Assert
     assert any("fuel" in r.message.lower() for r in caplog.records)
+
+
+def test_a_same_family_fuel_refinement_is_not_logged(
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    # A solid-fuel room heater's natural fuel (house coal 33) is a *default* for
+    # the ambiguous solid family. A "smokeless coal" override refines it within
+    # the same family — that is expected, not a contradiction, so it must NOT log.
+    # Only a different fuel family (gas/electric on a solid heater) is flagged.
+    overrides = ResolvedPropertyOverrides(
+        rows=(
+            ResolvedPropertyOverride(
+                "main_heating_system", 0, "Solid fuel room heater, closed"
+            ),
+            ResolvedPropertyOverride("main_fuel", 0, "smokeless coal"),
+        )
+    )
+
+    # Act
+    with caplog.at_level(logging.WARNING):
+        flag_fuel_mismatch(overrides)
+
+    # Assert
+    assert caplog.records == []