diff --git a/zerver/lib/integrations.py b/zerver/lib/integrations.py
index 020f5c5c46..c510644ee3 100644
--- a/zerver/lib/integrations.py
+++ b/zerver/lib/integrations.py
@@ -91,6 +91,7 @@ class Integration:
         self.categories = list(map((lambda c: CATEGORIES[c]), categories))
 
         self.logo_path = logo if logo is not None else self.get_logo_path()
+        # TODO: Enforce that all integrations have logo_url with an assertion.
         self.logo_url = self.get_logo_url()
 
         if display_name is None:
diff --git a/zerver/tests/test_docs.py b/zerver/tests/test_docs.py
index 72571bf4fa..21a3b5fa62 100644
--- a/zerver/tests/test_docs.py
+++ b/zerver/tests/test_docs.py
@@ -320,6 +320,7 @@ class HelpTest(ZulipTestCase):
 class IntegrationTest(ZulipTestCase):
     def test_check_if_every_integration_has_logo_that_exists(self) -> None:
         for integration in INTEGRATIONS.values():
+            assert integration.logo_url is not None
             path = urlsplit(integration.logo_url).path
             self.assertTrue(os.path.isfile(settings.DEPLOY_ROOT + path), integration.name)