diff --git a/tests/domain/modelling/test_elmhurst_cascade_pins.py b/tests/domain/modelling/test_elmhurst_cascade_pins.py
index 704cc1fb..b9cdb62e 100644
--- a/tests/domain/modelling/test_elmhurst_cascade_pins.py
+++ b/tests/domain/modelling/test_elmhurst_cascade_pins.py
@@ -17,8 +17,6 @@ from __future__ import annotations
 from dataclasses import replace
 from typing import Final
 
-import pytest
-
 from datatypes.epc.domain.epc_property_data import (
     BuildingPartIdentifier,
     EpcPropertyData,
@@ -177,16 +175,6 @@ def test_solid_brick_generator_offers_ewi_and_iwi_each_pinning_its_after() -> No
     )
 
 
-@pytest.mark.xfail(
-    strict=True,
-    reason="Blocked on Hestia-Homes/Model#1177 — the calculator-side "
-    "wall_construction=6 collision: "
-    "Elmhurst 'SY System build' and 'B Basement wall' both map to 6 "
-    "(mapper.py:2100), so `main_wall_is_basement` is wrongly True for "
-    "system-built and the generator's basement guard suppresses it. Flips "
-    "green once system-built is disambiguated from basement (MAIN "
-    "wall_construction==6 with main_wall_is_basement False).",
-)
 def test_system_built_generator_offers_ewi_and_iwi_each_pinning_its_after() -> None:
     # Arrange — system-built (precast concrete) takes both Options like solid
     # brick (ADR-0019): one uninsulated before, two re-lodged afters.