diff --git a/templates/partials/communication_preferences_fields.html b/templates/partials/communication_preferences_fields.html
index 928c6bc..14d60a4 100644
--- a/templates/partials/communication_preferences_fields.html
+++ b/templates/partials/communication_preferences_fields.html
@@ -54,23 +54,15 @@
                 return;
             }
 
-            function syncSubPreferences() {
+            master.addEventListener('change', function () {
                 if (master.checked) {
                     subPrefs.style.display = '';
+                    updates.checked = true;
                 } else {
                     subPrefs.style.display = 'none';
                     updates.checked = false;
                     marketing.checked = false;
                 }
-            }
-
-            master.addEventListener('change', function () {
-                if (master.checked) {
-                    subPrefs.style.display = '';
-                    updates.checked = true;
-                } else {
-                    syncSubPreferences();
-                }
             });
         });
     })();
diff --git a/tests/routers/core/test_account.py b/tests/routers/core/test_account.py
index 22548a9..382c40a 100644
--- a/tests/routers/core/test_account.py
+++ b/tests/routers/core/test_account.py
@@ -450,6 +450,9 @@ def test_register_page_shows_password_requirements(unauth_client: TestClient):
     assert 'name="comm_opt_in"' in html
     assert 'name="comm_updates"' in html
     assert 'name="comm_marketing"' in html
+
+
+def test_register_page_confirm_password_has_autocomplete(unauth_client: TestClient):
     """Issue #156: Both password fields must have autocomplete='new-password' for Chrome autofill."""
     response = unauth_client.get(app.url_path_for("read_register"))
     assert response.status_code == 200