diff --git a/tests/domain/epc/test_main_heating_system_overlay.py b/tests/domain/epc/test_main_heating_system_overlay.py
index ec9e978aa..576b8716d 100644
--- a/tests/domain/epc/test_main_heating_system_overlay.py
+++ b/tests/domain/epc/test_main_heating_system_overlay.py
@@ -115,24 +115,26 @@ def test_overlay_raises_on_an_incomplete_companion_set(
     "main_heating_value",
     ["Community heating, boilers", "Community heating, CHP and boilers"],
 )
-def test_community_heating_drags_the_conservative_group_3_control(
+def test_community_heating_drags_the_default_group_3_control(
     main_heating_value: str,
 ) -> None:
     # The landlord names the scheme, not its control or charging arrangement.
-    # The conservative Table 4e Group 3 default is 2301 ("flat rate charging,
-    # no thermostatic control of room temperature"): the largest Group 3
-    # temperature adjustment (+0.3 C) AND the worst Table 4c(3) charging
-    # factors (space 1.10, DHW 1.05) — an unobserved control is never
-    # over-credited and an unobserved charging arrangement is never assumed
-    # usage-linked (ADR-0053). Leaving it unset inherits the replaced system's
-    # control instead (the ADR-0048 bug class).
+    # The Table 4e Group 3 default is 2313 ("flat rate charging, room
+    # thermostat and TRVs"): community schemes skew modern and the portfolio's
+    # own lodged community certs are overwhelmingly thermostatted (modal 2306;
+    # none lodge 2301), so the KIT axis concedes to the evidence — while the
+    # CHARGING axis stays flat-rate (space 1.05 / DHW 1.05): the billing
+    # arrangement is scheme paperwork an override genuinely cannot see, so
+    # usage-linked (1.0/1.0) is never assumed (ADR-0053, decided with Khalim).
+    # Leaving the control unset inherits the replaced system's instead (the
+    # ADR-0048 bug class).
     # Act
     simulation = main_heating_overlay_for(main_heating_value, 0)
 
-    # Assert — SAP Table 4e Group 3 conservative heat-network control.
+    # Assert — SAP Table 4e Group 3 default heat-network control.
     assert simulation is not None
     assert simulation.heating is not None
-    assert simulation.heating.main_heating_control == 2301
+    assert simulation.heating.main_heating_control == 2313
 
 
 def test_air_source_heat_pump_drags_the_conservative_group_2_control() -> None: