diff --git a/tests/app/main/test_validators.py b/tests/app/main/test_validators.py
index f7a6f959d..d1fd670fa 100644
--- a/tests/app/main/test_validators.py
+++ b/tests/app/main/test_validators.py
@@ -136,6 +136,7 @@ def test_valid_list_of_white_list_email_domains(
     'test@police.test.uk',
     'test@ucds.com',
     'test@123bl.uk',
+    'test@derrystrabane.com',
 ])
 def test_invalid_list_of_white_list_email_domains(
     client,