diff --git a/tests/db/test_squeak_db.py b/tests/db/test_squeak_db.py
index 5a09d65d..0771b755 100644
--- a/tests/db/test_squeak_db.py
+++ b/tests/db/test_squeak_db.py
@@ -311,6 +311,11 @@ def inserted_received_offer_id(squeak_db, received_offer):
     yield squeak_db.insert_received_offer(received_offer)
 
 
+@pytest.fixture
+def duplicate_inserted_received_offer_id(squeak_db, inserted_received_offer_id, received_offer):
+    yield squeak_db.insert_received_offer(received_offer)
+
+
 def test_init_with_retries(squeak_db):
     with mock.patch.object(squeak_db, 'init', autospec=True) as mock_init, \
             mock.patch('squeaknode.db.squeak_db.time.sleep', autospec=True) as mock_sleep:
@@ -1087,6 +1092,10 @@ def test_get_received_offer(squeak_db, inserted_received_offer_id, received_offe
     ) == received_offer
 
 
+def test_duplicate_inserted_received_offer(squeak_db, duplicate_inserted_received_offer_id):
+    assert duplicate_inserted_received_offer_id is None
+
+
 def test_get_received_offer_none(squeak_db, inserted_received_offer_id, received_offer):
     retrieved_received_offer = squeak_db.get_received_offer(
         -1,