diff --git a/tests/domain/epc_prediction/test_component_accuracy_gate.py b/tests/domain/epc_prediction/test_component_accuracy_gate.py
index e4bcd41f6..a9065c926 100644
--- a/tests/domain/epc_prediction/test_component_accuracy_gate.py
+++ b/tests/domain/epc_prediction/test_component_accuracy_gate.py
@@ -124,11 +124,20 @@ _RATE_FLOORS: dict[str, float] = {
 # dimensional predictions); floor_area loosened 12.0378 -> 12.0586 as the one
 # physical residual that fell (1-2 targets picking a new-build donor). See the
 # _RATE_FLOORS note above.
+# total_window_area 3.7184 -> 3.7484 and door_count 0.3333 -> 0.3737 re-baselined
+# when the external-measurement conversion landed (#1669: measurement_type=2 certs
+# now have their floor area + exposed perimeter converted external->internal per
+# RdSAP 10 §3.4 + Table 2). The leave-one-out scorer re-derives the *actual*
+# EpcPropertyData through the same mapper, so the sharper (internal) dimensions of
+# the fixture's external certs shift the geo-proximity-weighted donor mode — a
+# ground-truth-method change, not a prediction-logic loosening (spec-correct,
+# corpus MAE 0.571 -> 0.570 and the real-cert pin held). The move is two
+# single-target donor tips on the n=36 fixture. Tighten-only resumes from here.
 _RESIDUAL_CEILINGS: dict[str, float] = {
     "floor_area": 12.0586,
-    "total_window_area": 3.7184,
+    "total_window_area": 3.7484,
     "building_parts": 0.1212,
-    "door_count": 0.3333,
+    "door_count": 0.3737,
 }
 
 _TOLERANCE = 1e-3
diff --git a/tests/domain/epc_prediction/test_expired_pairs_gate.py b/tests/domain/epc_prediction/test_expired_pairs_gate.py
index ed037815c..93abebb8b 100644
--- a/tests/domain/epc_prediction/test_expired_pairs_gate.py
+++ b/tests/domain/epc_prediction/test_expired_pairs_gate.py
@@ -55,6 +55,15 @@ _FIXTURE = (
 # 28-scoreable fixture) and residual ceilings — the measured values; tighten,
 # never loosen. The general (unconditioned) prediction floors live in
 # test_component_accuracy_gate.py; this gate guards the CONDITIONING path.
+#
+# has_pv re-baselined 0.8929 -> 0.8571 when the external-measurement conversion
+# landed (#1669: measurement_type=2 certs converted external->internal per RdSAP
+# 10 §3.4 + Table 2). This gate re-derives the *actual* EpcPropertyData through
+# the same mapper, so the sharper internal dimensions of the fixture's external
+# certs shift the conditioned donor mode and one pair's has_pv agreement tips
+# 25/28 -> 24/28 — a ground-truth-method change, not a prediction-logic loosening
+# (spec-correct; corpus MAE improved and the real-cert pin held). Tighten-only
+# resumes from here.
 _CLASSIFICATION_FLOORS: dict[str, float] = {
     "construction_age_band": 0.5357,
     "construction_age_band_pm1": 0.8214,
@@ -62,7 +71,7 @@ _CLASSIFICATION_FLOORS: dict[str, float] = {
     "floor_construction": 0.8636,
     "floor_insulation": 1.0000,
     "has_hot_water_cylinder": 0.8214,
-    "has_pv": 0.8929,
+    "has_pv": 0.8571,
     "has_room_in_roof": 0.8571,
     "heating_main_category": 1.0000,
     "heating_main_control": 0.6071,