diff --git a/securedrop/tests/test_i18n.py b/securedrop/tests/test_i18n.py
index 06334fccb26..483233dde54 100644
--- a/securedrop/tests/test_i18n.py
+++ b/securedrop/tests/test_i18n.py
@@ -228,6 +228,9 @@ def verify_i18n(app):
             assert 'hreflang="fr-FR"' in locales
 
         c.get("/?l=ar")
+        # We have to render a template that inherits from "base.html" so that "tab_title" will be
+        # set.  But we're just checking that when a page is rendered in an RTL language the
+        # directionality is correct, so it doesn't matter which template we render.
         base = render_template("error.html", error={})
         assert 'dir="rtl"' in base