diff --git a/Dockerfile b/Dockerfile
index 63a7bad..ee94439 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/furthemore/apis:apis-base-cb35d5b
+FROM ghcr.io/furthemore/apis:apis-base-3d1a81a
 
 LABEL org.opencontainers.image.source="https://github.com/furthemore/APIS"
 
diff --git a/registration/tests/test_registration_printing.py b/registration/tests/test_registration_printing.py
index 36f1250..04d6b85 100644
--- a/registration/tests/test_registration_printing.py
+++ b/registration/tests/test_registration_printing.py
@@ -1,3 +1,4 @@
+from contextlib import contextmanager
 from datetime import timedelta
 from pathlib import Path
 from unittest.mock import patch
@@ -6,8 +7,11 @@
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.test import Client, TestCase
+from django.test.utils import override_settings
 from django.urls import reverse
 from django.utils import timezone
+import httpx
+import respx
 
 from registration.models import (
     Attendee,
@@ -24,6 +28,28 @@
 ten_days = timedelta(days=10)
 
 
+@contextmanager
+def patch_gotenberg(have_gotenberg_host):
+    if have_gotenberg_host:
+        yield
+        return
+
+    patcher = override_settings(GOTENBERG_HOST="https://localhost:9125")
+    patcher.enable()
+
+    try:
+        with respx.mock:
+            convert_route = respx.post(
+                "https://localhost:9125/forms/chromium/convert/html"
+            ).mock(return_value=httpx.Response(204))
+
+            yield
+
+            assert convert_route.called
+    finally:
+        patcher.disable()
+
+
 class TestRegistrationPrinting(TestCase):
     def setUp(self):
         self.admin_user = User.objects.create_superuser("admin", "admin@host", "admin")
@@ -105,6 +131,7 @@ def test_print_wkhtmltopdf(self):
 
     def test_print_gotenberg(self):
         settings.PRINT_RENDERER = "gotenberg"
-        data = self._badge_generates_pdf()
+        with patch_gotenberg(hasattr(settings, "GOTENBERG_HOST")):
+            data = self._badge_generates_pdf()
         # gotenberg responses return a signed data parameter with badge IDs
         self.assertIn("?data=", data["file"])
diff --git a/requirements.txt b/requirements.txt
index a56ef38..e9cd190 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,6 +22,7 @@ paho-mqtt==1.6.1
 Pillow>=5.3
 psycopg2-binary==2.9.9
 PyJWT~=2.8.0
+respx==0.22.0
 sentry-sdk
 squareup==22.0.0.20220921
 qrcode~=7.4.2