diff --git a/neutron_tempest_plugin/api/admin/test_quotas_negative.py b/neutron_tempest_plugin/api/admin/test_quotas_negative.py
index 9c37d92..ae7c60f 100644
--- a/neutron_tempest_plugin/api/admin/test_quotas_negative.py
+++ b/neutron_tempest_plugin/api/admin/test_quotas_negative.py
@@ -13,6 +13,7 @@
 from neutron_lib import constants
 from tempest.common import utils
 from tempest.lib.common.utils import data_utils
+from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 
@@ -24,6 +25,13 @@
 
 class QuotasAdminNegativeTestJSON(test_quotas.QuotasTestBase):
 
+    def wait_network_ports(self, network_id, number):
+        def _wait_ports(network_id, number):
+            ports = self.admin_client.list_ports(
+                network_id=network_id)
+            return len(ports) == number
+        test_utils.call_until_true(_wait_ports, 90, 5, network_id, number)
+
     @decorators.attr(type='negative')
     @decorators.idempotent_id('952f9b24-9156-4bdc-90f3-682a3d4302f0')
     def test_create_network_when_quotas_is_full(self):
@@ -74,6 +82,9 @@
                        'cidr': '10.0.0.0/24',
                        'ip_version': '4'}
         subnet = self.admin_client.create_subnet(**subnet_args)['subnet']
+        self.wait_network_ports(subnet["network_id"],
+                                CONF.network.service_ports_number)
+
         self.addCleanup(self.admin_client.delete_subnet, subnet['id'])
 
         ports = self.admin_client.list_ports(tenant_id=tenant_id)