diff --git a/etl/hubspot/tests/test_abri_flow_triggers.py b/etl/hubspot/tests/test_abri_flow_triggers.py
index e85ef2f7b..1e0ecdf52 100644
--- a/etl/hubspot/tests/test_abri_flow_triggers.py
+++ b/etl/hubspot/tests/test_abri_flow_triggers.py
@@ -174,6 +174,32 @@ def test_a_blank_surveyor_on_a_booked_deal_with_no_stored_surveyor_is_not_a_chan
     assert message is None
 
 
+def test_a_blank_stored_surveyor_and_a_missing_incoming_one_are_not_a_change() -> None:
+    # Arrange: booking exists; DB stored "" for the surveyor, HubSpot omits it.
+    old_deal = make_old_deal(
+        project_code=ABRI_PROJECT_CODE,
+        confirmed_survey_date=datetime(2026, 6, 24, tzinfo=timezone.utc),
+        confirmed_survey_time="14:30",
+        third_party_surveyor_identifier="",
+    )
+    new_deal = make_new_deal(
+        confirmed_survey_date="2026-06-24",
+        confirmed_survey_time="14:30",
+    )
+
+    # Act
+    message = HubspotDealDiffer.check_abri_triggers_and_construct_message(
+        hubspot_deal_id=DEAL_ID,
+        new_deal=new_deal,
+        new_project=None,
+        new_listing=LISTING,
+        old_deal=old_deal,
+    )
+
+    # Assert
+    assert message is None
+
+
 def test_an_unchanged_surveyor_on_a_booked_deal_fires_nothing() -> None:
     # Arrange: booking exists; surveyor and appointment are unchanged.
     old_deal = make_old_deal(