diff --git a/tests/integration/test_meter_checkpoint_c1.py b/tests/integration/test_meter_checkpoint_c1.py
index 145adbe..51f9638 100644
--- a/tests/integration/test_meter_checkpoint_c1.py
+++ b/tests/integration/test_meter_checkpoint_c1.py
@@ -78,12 +78,63 @@ def test_replacement_keeps_old_history_and_links_new_meter(app, admin_user):
     with app.app_context():
         _, building, _ = _equipment()
         old = create_meter(name="Old", building_id=building.id)
-        record_meter_reading(meter=old, value=12, user_id=admin_user["id"])
+        old_reading = record_meter_reading(meter=old, value=12, user_id=admin_user["id"])
         new = replace_meter(old_meter=old, name="New", user_id=admin_user["id"])
         assert old.status == "replaced"
         assert old.is_active is False
         assert new.replaces_meter_id == old.id
         assert MeterReading.query.filter_by(meter_id=old.id).count() == 1
+        with pytest.raises(MeterDomainError):
+            record_meter_reading(meter=old, value=13, user_id=admin_user["id"])
+        assert MeterReading.query.filter_by(meter_id=old.id).count() == 1
+        assert old.current_value == 12
+        corrected = correct_meter_reading(
+            reading=old_reading, new_value=12.5, user_id=admin_user["id"], reason="TEST_UI_C1_CLOSE correction"
+        )
+        assert corrected.value == 12.5
+        record_meter_reading(meter=new, value=1, user_id=admin_user["id"])
+        assert new.current_value == 1
+
+
+def test_replaced_meter_http_is_read_only_but_history_remains_accessible(app, admin_user, authenticated_client):
+    with app.app_context():
+        _, building, _ = _equipment()
+        old = create_meter(name="TEST_UI_C1_CLOSE_OLD", building_id=building.id)
+        record_meter_reading(meter=old, value=20, user_id=admin_user["id"])
+        new = replace_meter(old_meter=old, name="TEST_UI_C1_CLOSE_NEW", user_id=admin_user["id"])
+
+        response = authenticated_client.get(f"/meters/{old.id}")
+        assert response.status_code == 200
+        assert b"Compteur remplac" in response.data
+        assert b"Nouveau relev\xc3\xa9" not in response.data
+        assert new.name.encode() in response.data
+        assert b"Historique des relev\xc3\xa9s" in response.data
+
+        before = MeterReading.query.filter_by(meter_id=old.id).count()
+        response = authenticated_client.post(
+            f"/meters/{old.id}/reading", data={"value": "21"}, follow_redirects=True
+        )
+        assert response.status_code == 200
+        assert b"inactif ou remplac" in response.data
+        assert MeterReading.query.filter_by(meter_id=old.id).count() == before
+
+
+def test_replaced_equipment_meter_json_route_returns_business_error(app, admin_user, authenticated_client):
+    with app.app_context():
+        equipment, _, _ = _equipment()
+        old = create_meter(name="TEST_UI_C1_CLOSE_EQUIPMENT", equipment_id=equipment.id)
+        record_meter_reading(meter=old, value=30, user_id=admin_user["id"])
+        replace_meter(old_meter=old, name="TEST_UI_C1_CLOSE_EQUIPMENT_NEW", user_id=admin_user["id"])
+        before = MeterReading.query.filter_by(meter_id=old.id).count()
+
+        response = authenticated_client.post(
+            f"/equipments/{equipment.id}/meters/reading",
+            json={"meter_id": old.id, "value": 31},
+        )
+        assert response.status_code == 400
+        assert response.get_json()["success"] is False
+        assert "remplac" in response.get_json()["error"]
+        assert MeterReading.query.filter_by(meter_id=old.id).count() == before
 
 
 def _edit_payload(meter, building, **extra):