diff --git a/tests/app/dao/test_monthly_billing.py b/tests/app/dao/test_monthly_billing.py
index a1d5bef7d..e09814708 100644
--- a/tests/app/dao/test_monthly_billing.py
+++ b/tests/app/dao/test_monthly_billing.py
@@ -153,10 +153,15 @@ def test_add_monthly_billing_for_single_month_populates_correctly(
     sample_template, sample_email_template
 ):
     create_rate(start_date=JAN_2017_MONTH_START, value=0.0158, notification_type=SMS_TYPE)
+    letter_template = sample_letter_template(sample_template.service)
+    create_letter_rate(crown=False)
     create_notification(
         template=sample_template, created_at=JAN_2017_MONTH_START,
         billable_units=1, rate_multiplier=2, status='delivered'
     )
+    create_notification(template=sample_email_template, created_at=JAN_2017_MONTH_START,
+                        status='delivered')
+    create_notification(template=letter_template, created_at=JAN_2017_MONTH_START, status='delivered')
 
     create_or_update_monthly_billing(
         service_id=sample_template.service_id,
@@ -169,7 +174,14 @@ def test_add_monthly_billing_for_single_month_populates_correctly(
     _assert_monthly_billing(
         monthly_billing[0], sample_template.service.id, 'email', JAN_2017_MONTH_START, JAN_2017_MONTH_END
     )
-    assert monthly_billing[0].monthly_totals == []
+    _assert_monthly_billing_totals(
+        monthly_billing[0].monthly_totals[0], {
+            "billing_units": 1,
+            "rate_multiplier": 1,
+            "international": False,
+            "rate": 0.0,
+            "total_cost": 0
+        })
 
     _assert_monthly_billing(
         monthly_billing[1], sample_template.service.id, 'sms', JAN_2017_MONTH_START, JAN_2017_MONTH_END
@@ -185,11 +197,17 @@ def test_add_monthly_billing_for_single_month_populates_correctly(
     _assert_monthly_billing(
         monthly_billing[2], sample_template.service.id, 'letter', JAN_2017_MONTH_START, JAN_2017_MONTH_END
     )
-    assert monthly_billing[2].monthly_totals == []
+    _assert_monthly_billing_totals(monthly_billing[2].monthly_totals[0], {
+        "billing_units": 1,
+        "rate_multiplier": 1,
+        "international": False,
+        "rate": 0.31,
+        "total_cost": 1 * 0.31
+    })
 
 
 def test_add_monthly_billing_for_multiple_months_populate_correctly(
-    sample_template, sample_email_template
+    sample_template
 ):
     create_rate(start_date=FEB_2016_MONTH_START - timedelta(days=1), value=0.12, notification_type=SMS_TYPE)
     create_notification(