diff --git a/app/celery/nightly_tasks.py b/app/celery/nightly_tasks.py
index 080445df1..ca48955f0 100644
--- a/app/celery/nightly_tasks.py
+++ b/app/celery/nightly_tasks.py
@@ -62,6 +62,14 @@ def _remove_csv_files(job_types):
         current_app.logger.info("Job ID {} has been removed from s3.".format(job.id))
 
 
+@notify_celery.task(name="delete-notifications-older-than-retention")
+@statsd(namespace="tasks")
+def delete_notifications_older_than_retention():
+    delete_email_notifications_older_than_retention()
+    delete_sms_notifications_older_than_retention()
+    delete_letter_notifications_older_than_retention()
+
+
 @notify_celery.task(name="delete-sms-notifications")
 @cronitor("delete-sms-notifications")
 @statsd(namespace="tasks")
diff --git a/app/config.py b/app/config.py
index 7dba73014..f31bf49e6 100644
--- a/app/config.py
+++ b/app/config.py
@@ -238,27 +238,16 @@ class Config(object):
             'schedule': crontab(hour=0, minute=30),  # after 'timeout-sending-notifications'
             'options': {'queue': QueueNames.REPORTING}
         },
-        'delete-sms-notifications': {
-            'task': 'delete-sms-notifications',
+        'delete-notifications-older-than-retention': {
+            'task': 'delete-notifications-older-than-retention',
             'schedule': crontab(hour=4, minute=15),  # after 'create-nightly-notification-status'
             'options': {'queue': QueueNames.PERIODIC}
         },
-        'delete-email-notifications': {
-            'task': 'delete-email-notifications',
-            'schedule': crontab(hour=4, minute=30),  # after 'create-nightly-notification-status'
-            'options': {'queue': QueueNames.PERIODIC}
-        },
-        'delete-letter-notifications': {
-            'task': 'delete-letter-notifications',
-            'schedule': crontab(hour=4, minute=45),  # after 'create-nightly-notification-status'
-            'options': {'queue': QueueNames.PERIODIC}
-        },
         'delete-inbound-sms': {
             'task': 'delete-inbound-sms',
             'schedule': crontab(hour=1, minute=40),
             'options': {'queue': QueueNames.PERIODIC}
         },
-
         'send-daily-performance-platform-stats': {
             'task': 'send-daily-performance-platform-stats',
             'schedule': crontab(hour=2, minute=0),