diff --git a/gregui/mailutils.py b/gregui/mailutils.py
index 4968c9784a7bbebd5624e7d91f7e9992278cd70f..06b624d6d1a303810f059d465a0d2a68bb7db1e4 100644
--- a/gregui/mailutils.py
+++ b/gregui/mailutils.py
@@ -1,3 +1,4 @@
+from django.conf import settings
 from django.core.mail import send_mail
 from django.template.loader import render_to_string
 
@@ -22,7 +23,7 @@ def confirmation_template(guest) -> str:
 def send_registration_mail(mail_to, sponsor) -> int:
     return send_mail(
         subject="Subject",
-        message=registration_template("UiO", sponsor),
+        message=registration_template(settings.INSTANCE_NAME, sponsor),
         from_email=None,
         recipient_list=[mail_to]
     )
diff --git a/gregui/tests/test_mailutils.py b/gregui/tests/test_mailutils.py
index 3e664d376453eced5cf109f6cfce8e53895f9b33..f775ed6bd44ace4b5ee7c76e9c07fe43a82dfb9a 100644
--- a/gregui/tests/test_mailutils.py
+++ b/gregui/tests/test_mailutils.py
@@ -8,14 +8,14 @@ from gregui import mailutils
 def test_registration_template():
 
     prefilled_template = """Dette er en automatisk generert melding fra gjestregistreringstjenesten.
-Du har blitt registrert som gjest på UiO av Foo Bar.
+Du har blitt registrert som gjest på InstanceName av Foo Bar.
 For å fullføre registreringen av gjestekontoen følg denne lenken: www.google.com
 
 This message has been automatically generated by the guest registration system.
-You have been registered as a guest at UiO by Foo Bar.
+You have been registered as a guest at InstanceName by Foo Bar.
 To complete the registration of your guest account, please follow this link: www.google.com
 """
-    rendered_template = mailutils.registration_template("UiO", "Foo Bar")
+    rendered_template = mailutils.registration_template("InstanceName", "Foo Bar")
     assert rendered_template == prefilled_template