diff --git a/nova/api/openstack/compute/contrib/admin_actions.py b/nova/api/openstack/compute/contrib/admin_actions.py
index 9ead1d1ef393..03c42ac973ac 100644
--- a/nova/api/openstack/compute/contrib/admin_actions.py
+++ b/nova/api/openstack/compute/contrib/admin_actions.py
@@ -219,11 +219,7 @@ class AdminActionsController(wsgi.Controller):
         """
         context = req.environ["nova.context"]
         authorize(context, 'createBackup')
-
-        try:
-            entity = body["createBackup"]
-        except (KeyError, TypeError):
-            raise exc.HTTPBadRequest(_("Malformed request body"))
+        entity = body["createBackup"]
 
         try:
             image_name = entity["name"]
diff --git a/nova/api/openstack/compute/plugins/v3/admin_actions.py b/nova/api/openstack/compute/plugins/v3/admin_actions.py
index 2089dff242ae..a83e159dda53 100644
--- a/nova/api/openstack/compute/plugins/v3/admin_actions.py
+++ b/nova/api/openstack/compute/plugins/v3/admin_actions.py
@@ -210,11 +210,7 @@ class AdminActionsController(wsgi.Controller):
         """
         context = req.environ["nova.context"]
         authorize(context, 'create_backup')
-
-        try:
-            entity = body["create_backup"]
-        except (KeyError, TypeError):
-            raise exc.HTTPBadRequest(_("Malformed request body"))
+        entity = body["create_backup"]
 
         try:
             image_name = entity["name"]
diff --git a/nova/tests/api/openstack/compute/contrib/test_admin_actions.py b/nova/tests/api/openstack/compute/contrib/test_admin_actions.py
index 30a0767a9b50..373bf283a38d 100644
--- a/nova/tests/api/openstack/compute/contrib/test_admin_actions.py
+++ b/nova/tests/api/openstack/compute/contrib/test_admin_actions.py
@@ -433,6 +433,17 @@ class CreateBackupTests(CommonMixin, test.NoDBTestCase):
         self._test_non_existing_instance('createBackup',
                                          body_map=body_map)
 
+    def test_create_backup_with_invalid_createBackup(self):
+        body = {
+            'createBackupup': {
+                'name': 'Backup 1',
+                'backup_type': 'daily',
+                'rotation': 1,
+            },
+        }
+        res = self._make_request(self._make_url('fake'), body)
+        self.assertEqual(400, res.status_int)
+
 
 class ResetStateTests(test.NoDBTestCase):
     def setUp(self):
diff --git a/nova/tests/api/openstack/compute/plugins/v3/test_admin_actions.py b/nova/tests/api/openstack/compute/plugins/v3/test_admin_actions.py
index 972ebe0b5f90..2431837dd15a 100644
--- a/nova/tests/api/openstack/compute/plugins/v3/test_admin_actions.py
+++ b/nova/tests/api/openstack/compute/plugins/v3/test_admin_actions.py
@@ -490,6 +490,17 @@ class CreateBackupTests(CommonMixin, test.NoDBTestCase):
         self._test_non_existing_instance('create_backup',
                                          body_map=body_map)
 
+    def test_create_backup_with_invalid_create_backup(self):
+        body = {
+            'create_backupup': {
+                'name': 'Backup 1',
+                'backup_type': 'daily',
+                'rotation': 1,
+            },
+        }
+        res = self._make_request(self._make_url('fake'), body)
+        self.assertEqual(400, res.status_int)
+
 
 class ResetStateTests(test.NoDBTestCase):
     def setUp(self):