diff --git a/tests/app/celery/test_tasks.py b/tests/app/celery/test_tasks.py
index 4692f8df3..604c046e6 100644
--- a/tests/app/celery/test_tasks.py
+++ b/tests/app/celery/test_tasks.py
@@ -1032,6 +1032,7 @@ def test_create_dvla_file_contents(sample_letter_template, mocker):
 
     # Personalisation
     assert not calls[0][0][1]
+    assert not calls[1][0][1]
 
     # Named arguments
     assert calls[1][1]['contact_block'] == 'London,\nSW1A 1AA'