diff --git a/tests/repositories/hubspot_deals/test_deal_database_postgres_gateway.py b/tests/repositories/hubspot_deals/test_deal_database_postgres_gateway.py
index 89d4cde38..aaa96733b 100644
--- a/tests/repositories/hubspot_deals/test_deal_database_postgres_gateway.py
+++ b/tests/repositories/hubspot_deals/test_deal_database_postgres_gateway.py
@@ -2,7 +2,7 @@ from collections.abc import Iterator
 
 import pytest
 from sqlalchemy import Engine
-from sqlmodel import Session
+from sqlmodel import Session, text
 
 from backend.app.db.models.hubspot_deal_data import HubspotDealData
 from repositories.hubspot_deals.deal_database_postgres_gateway import (
@@ -48,6 +48,30 @@ def test_record_job_no_for_an_unknown_deal_raises(session: Session) -> None:
         gateway.record_job_no(deal_id="0000000000", job_no="AD0226519")
 
 
+def test_the_job_no_is_stored_in_the_client_booking_reference_column(
+    session: Session,
+) -> None:
+    # The physical column matches the HubSpot property the job number is
+    # stored under (client_booking_reference); only the domain calls it
+    # job_no. The deployed table is migrated by the frontend repo, so the
+    # column name here must match what that migration created.
+    # Arrange
+    _insert_deal(session, DEAL_ID)
+    gateway = DealDatabasePostgresGateway(session=session)
+
+    # Act
+    gateway.record_job_no(deal_id=DEAL_ID, job_no="AD0226519")
+
+    # Assert
+    stored = session.exec(  # type: ignore[reportCallOverload]
+        text(
+            "select client_booking_reference from hubspot_deal_data "
+            "where deal_id = :deal_id"
+        ).bindparams(deal_id=DEAL_ID)
+    ).one()
+    assert stored[0] == "AD0226519"
+
+
 def test_job_no_for_deal_returns_the_recorded_job_no(session: Session) -> None:
     # Arrange
     _insert_deal(session, DEAL_ID)