diff --git a/registration/templates/registration/utility_pages.html b/registration/templates/registration/utility_pages.html
index 354e74f8..8366b748 100644
--- a/registration/templates/registration/utility_pages.html
+++ b/registration/templates/registration/utility_pages.html
@@ -35,7 +35,6 @@
 <script src="{% static 'js/jquery.loadTemplate.min.js' %}"></script>
 <script src="{% static 'js/bootstrap.bundle.min.js' %}"></script>
 <script src="{% static 'js/address-fields.js' %}"></script>
-<script src="{% static 'js/validator.js' %}"></script>
 <script src="{% static 'js/main.js' %}"></script>
 
 {% block javascript %}
diff --git a/registration/tests/test_maintenance_mode.py b/registration/tests/test_maintenance_mode.py
new file mode 100644
index 00000000..22ffa4b3
--- /dev/null
+++ b/registration/tests/test_maintenance_mode.py
@@ -0,0 +1,75 @@
+import shutil
+import tempfile
+from http import HTTPStatus
+from pathlib import Path
+
+from django.test import SimpleTestCase, override_settings
+
+
+class MaintenanceModeTest(SimpleTestCase):
+    """Test that django-maintenance-mode works as configured.
+
+    Uses SimpleTestCase (no database) since maintenance mode is purely
+    middleware-based and doesn't require DB access.
+    """
+
+    def setUp(self):
+        self._tmp_dir = tempfile.mkdtemp()
+        self.state_file = Path(self._tmp_dir) / "maintenance_mode_state.txt"
+        self.state_file.write_text("0")
+
+    def tearDown(self):
+        shutil.rmtree(self._tmp_dir, ignore_errors=True)
+
+    def _enable_maintenance(self):
+        self.state_file.write_text("1")
+
+    def _disable_maintenance(self):
+        self.state_file.write_text("0")
+
+    @override_settings(MAINTENANCE_MODE=True)
+    def test_maintenance_mode_returns_503(self):
+        """When maintenance mode is on, normal pages return 503."""
+        response = self.client.get("/registration/")
+        self.assertEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)
+
+    @override_settings(MAINTENANCE_MODE=True)
+    def test_maintenance_page_renders_without_error(self):
+        """The 503 maintenance template renders successfully (no missing static files)."""
+        response = self.client.get("/registration/")
+        self.assertEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)
+        self.assertIn(b"maintenance", response.content.lower())
+
+    @override_settings(MAINTENANCE_MODE=False)
+    def test_normal_mode_does_not_return_503(self):
+        """When maintenance mode is off, pages are not blocked by maintenance middleware."""
+        self.client.raise_request_exception = False
+        response = self.client.get("/registration/")
+        self.assertNotEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)
+
+    @override_settings(MAINTENANCE_MODE=True, MAINTENANCE_MODE_IGNORE_ADMIN_SITE=True)
+    def test_admin_site_accessible_during_maintenance(self):
+        """Admin site is reachable even during maintenance (per MAINTENANCE_MODE_IGNORE_ADMIN_SITE)."""
+        response = self.client.get("/admin/login/")
+        self.assertNotEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)
+
+    @override_settings(
+        MAINTENANCE_MODE=True, MAINTENANCE_MODE_IGNORE_URLS=("^/accounts/",)
+    )
+    def test_ignored_urls_accessible_during_maintenance(self):
+        """URLs matching MAINTENANCE_MODE_IGNORE_URLS are accessible during maintenance."""
+        self.client.raise_request_exception = False
+        response = self.client.get("/accounts/login/")
+        self.assertNotEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)
+
+    def test_state_file_controls_maintenance_mode(self):
+        """The file-based state backend enables/disables maintenance mode."""
+        self.client.raise_request_exception = False
+        with self.settings(MAINTENANCE_MODE_STATE_FILE_PATH=str(self.state_file)):
+            self._disable_maintenance()
+            response = self.client.get("/registration/")
+            self.assertNotEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)
+
+            self._enable_maintenance()
+            response = self.client.get("/registration/")
+            self.assertEqual(response.status_code, HTTPStatus.SERVICE_UNAVAILABLE)