diff --git a/tools/test-backend b/tools/test-backend
index fabe288609..af6542c477 100755
--- a/tools/test-backend
+++ b/tools/test-backend
@@ -100,7 +100,6 @@ not_yet_fully_covered = {
     'zerver/views/report.py',
     'zerver/views/unsubscribe.py',
     'zerver/views/zephyr.py',
-    'zerver/views/realm.py',
     'zerver/views/invite.py',
     'zerver/views/home.py',
     'zerver/views/registration.py',
diff --git a/zerver/tests/tests.py b/zerver/tests/tests.py
index 9505b20f9e..65d0844d31 100644
--- a/zerver/tests/tests.py
+++ b/zerver/tests/tests.py
@@ -210,6 +210,13 @@ class RealmTest(ZulipTestCase):
         self.assertEqual(realm.allow_message_editing, False)
         self.assertEqual(realm.message_content_edit_limit_seconds, 200)
 
+        # waiting_period_threshold
+        set_up_db('waiting_period_threshold', 10)
+        realm = update_with_api(waiting_period_threshold=20)
+        self.assertEqual(realm.waiting_period_threshold, 20)
+        realm = update_with_api(waiting_period_threshold=10)
+        self.assertEqual(realm.waiting_period_threshold, 10)
+
     def test_admin_restrictions_for_changing_realm_name(self):
         # type: () -> None
         new_name = 'Mice will play while the cat is away'