diff --git a/tests/app/notifications/test_process_notification.py b/tests/app/notifications/test_process_notification.py
index bbde98da2..2e302476a 100644
--- a/tests/app/notifications/test_process_notification.py
+++ b/tests/app/notifications/test_process_notification.py
@@ -256,8 +256,6 @@ def test_send_notification_to_queue_throws_exception_deletes_notification(
     [
         ("+14254147755", "sms", True),
         ("+14254147167", "sms", True),
-        ("2028675000", "sms", True),
-        ("2028675111", "sms", True),
         ("simulate-delivered@notifications.service.gov.uk", "email", True),
         ("simulate-delivered-2@notifications.service.gov.uk", "email", True),
         ("simulate-delivered-3@notifications.service.gov.uk", "email", True),
@@ -274,7 +272,7 @@ def test_simulated_recipient(notify_api, to_address, notification_type, expected
         'simulate-delivered-2@notifications.service.gov.uk',
         'simulate-delivered-2@notifications.service.gov.uk'
     )
-    SIMULATED_SMS_NUMBERS = ('+12028675000', '+12028675111', '+12028675222')
+    SIMULATED_SMS_NUMBERS = ("+14254147755", "+14254147167")
     """
     formatted_address = None
 
diff --git a/tests/app/service/send_notification/test_send_notification.py b/tests/app/service/send_notification/test_send_notification.py
index c65614e22..3ffbb8e2e 100644
--- a/tests/app/service/send_notification/test_send_notification.py
+++ b/tests/app/service/send_notification/test_send_notification.py
@@ -881,7 +881,7 @@ def test_should_not_persist_notification_or_send_email_if_simulated_email(
     assert Notification.query.count() == 0
 
 
-@pytest.mark.parametrize("to_sms", ["2028675000", "2028675111", "+12028675222"])
+@pytest.mark.parametrize("to_sms", ["+14254147755", "+14254147167"])
 def test_should_not_persist_notification_or_send_sms_if_simulated_number(
     client, to_sms, sample_template, mocker
 ):
diff --git a/tests/app/v2/notifications/test_post_notifications.py b/tests/app/v2/notifications/test_post_notifications.py
index f461531bc..bb9a58453 100644
--- a/tests/app/v2/notifications/test_post_notifications.py
+++ b/tests/app/v2/notifications/test_post_notifications.py
@@ -532,9 +532,8 @@ def test_post_email_notification_returns_201(
         ("simulate-delivered@notifications.service.gov.uk", EMAIL_TYPE),
         ("simulate-delivered-2@notifications.service.gov.uk", EMAIL_TYPE),
         ("simulate-delivered-3@notifications.service.gov.uk", EMAIL_TYPE),
-        ("2028675000", "sms"),
-        ("2028675111", "sms"),
-        ("2028675222", "sms"),
+        ("+14254147167", "sms"),
+        ("+14254147755", "sms"),
     ],
 )
 def test_should_not_persist_or_send_notification_if_simulated_recipient(