diff --git a/zilencer/lib/stripe.py b/zilencer/lib/stripe.py
index d4575d8c77..0242293b73 100644
--- a/zilencer/lib/stripe.py
+++ b/zilencer/lib/stripe.py
@@ -101,7 +101,7 @@ def stripe_get_customer(stripe_customer_id: str) -> stripe.Customer:
     return stripe_customer
 
 @catch_stripe_errors
-def get_upcoming_invoice(stripe_customer_id: str) -> stripe.Invoice:
+def stripe_get_upcoming_invoice(stripe_customer_id: str) -> stripe.Invoice:
     stripe_invoice = stripe.Invoice.upcoming(customer=stripe_customer_id)
     if PRINT_STRIPE_FIXTURE_DATA:
         print(''.join(['"upcoming_invoice": ', str(stripe_invoice), ',']))  # nocoverage
diff --git a/zilencer/views.py b/zilencer/views.py
index 6842a06bdf..108d36dbfa 100644
--- a/zilencer/views.py
+++ b/zilencer/views.py
@@ -26,7 +26,7 @@ from zerver.lib.timestamp import timestamp_to_datetime
 from zerver.models import UserProfile, Realm
 from zerver.views.push_notifications import validate_token
 from zilencer.lib.stripe import STRIPE_PUBLISHABLE_KEY, \
-    stripe_get_customer, get_upcoming_invoice, get_seat_count, \
+    stripe_get_customer, stripe_get_upcoming_invoice, get_seat_count, \
     extract_current_subscription, process_initial_upgrade, sign_string, \
     unsign_string, BillingError
 from zilencer.models import RemotePushDeviceToken, RemoteZulipServer, \
@@ -244,7 +244,7 @@ def billing_home(request: HttpRequest) -> HttpResponse:
         # Need user's timezone to do this properly
         renewal_date = '{dt:%B} {dt.day}, {dt.year}'.format(
             dt=timestamp_to_datetime(subscription.current_period_end))
-        upcoming_invoice = get_upcoming_invoice(customer.stripe_customer_id)
+        upcoming_invoice = stripe_get_upcoming_invoice(customer.stripe_customer_id)
         renewal_amount = subscription.plan.amount * subscription.quantity / 100.
         prorated_credits = 0
         prorated_charges = upcoming_invoice.amount_due / 100. - renewal_amount