diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index 75a4d6a..ba416e4 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -325,13 +325,13 @@
                              routes[i]['destination'])
             self.assertEqual(test_routes[i]['nexthop'], routes[i]['nexthop'])
 
-        self.routers_client.delete_extra_routes(router['id'])
+        self._delete_extra_routes(router['id'])
         show_body_after_deletion = self.routers_client.show_router(
             router['id'])
         self.assertEmpty(show_body_after_deletion['router']['routes'])
 
     def _delete_extra_routes(self, router_id):
-        self.routers_client.delete_extra_routes(router_id)
+        self.routers_client.update_router(router_id, routes=None)
 
     @test.idempotent_id('a8902683-c788-4246-95c7-ad9c6d63a4d9')
     def test_update_router_admin_state(self):
diff --git a/tempest/services/network/json/routers_client.py b/tempest/services/network/json/routers_client.py
index c1dfda0..78ffa77 100644
--- a/tempest/services/network/json/routers_client.py
+++ b/tempest/services/network/json/routers_client.py
@@ -42,15 +42,6 @@
         uri = '/routers'
         return self.list_resources(uri, **filters)
 
-    def delete_extra_routes(self, router_id):
-        uri = '/routers/%s' % router_id
-        put_body = {
-            'router': {
-                'routes': None
-            }
-        }
-        return self.update_resource(uri, put_body)
-
     def add_router_interface(self, router_id, **kwargs):
         """Add router interface.