diff --git a/openstack_dashboard/dashboards/project/networks/tests.py b/openstack_dashboard/dashboards/project/networks/tests.py
index 049e5d4d07..afc878af01 100644
--- a/openstack_dashboard/dashboards/project/networks/tests.py
+++ b/openstack_dashboard/dashboards/project/networks/tests.py
@@ -39,7 +39,8 @@ def form_data_subnet(subnet,
                      gateway_ip='', enable_dhcp=None,
                      allocation_pools=None,
                      dns_nameservers=None,
-                     host_routes=None):
+                     host_routes=None,
+                     no_gateway=None):
     def get_value(value, default):
         return default if value is None else value
 
@@ -50,7 +51,7 @@ def form_data_subnet(subnet,
 
     gateway_ip = subnet.gateway_ip if gateway_ip == '' else gateway_ip
     data['gateway_ip'] = gateway_ip or ''
-    data['no_gateway'] = (gateway_ip is None)
+    data['no_gateway'] = no_gateway or (gateway_ip is None)
 
     data['enable_dhcp'] = get_value(enable_dhcp, subnet.enable_dhcp)
     if data['ip_version'] == 6:
@@ -906,6 +907,50 @@ class NetworkTests(test.TestCase, NetworkStubMixin):
         self.test_network_create_post_with_subnet_gw_inconsistent(
             test_with_subnetpool=True)
 
+    @test.create_mocks({api.neutron: ('network_create',
+                                      'subnet_create',
+                                      'is_extension_supported',
+                                      'subnetpool_list')})
+    def test_network_create_post_with_subnet_ignore_error_msg_for_gateway(
+            self):
+        network = self.networks.first()
+        subnet = self.subnets.first()
+        params = {'name': network.name,
+                  'admin_state_up': network.admin_state_up,
+                  'shared': False}
+
+        self._stub_is_extension_supported({'network_availability_zone': False,
+                                           'subnet_allocation': True})
+        self.mock_subnetpool_list.return_value = self.subnetpools.list()
+        self.mock_network_create.return_value = network
+        self.mock_subnet_create.return_value = subnet
+
+        form_data = {'net_name': network.name,
+                     'admin_state': network.admin_state_up,
+                     'shared': False,
+                     'with_subnet': True}
+        subnet_params = {'network_id': network.id,
+                         'name': subnet.name,
+                         'cidr': subnet.cidr,
+                         'ip_version': subnet.ip_version,
+                         'gateway_ip': None,
+                         'enable_dhcp': subnet.enable_dhcp}
+        form_data.update(form_data_subnet(subnet, allocation_pools=[],
+                                          no_gateway=True, gateway_ip="."))
+        url = reverse('horizon:project:networks:create')
+        res = self.client.post(url, form_data)
+        self.assertNoWorkflowErrors(res)
+        self.assertRedirectsNoFollow(res, INDEX_URL)
+
+        self.mock_subnetpool_list.assert_called_once_with(test.IsHttpRequest())
+        self.mock_network_create.assert_called_once_with(
+            test.IsHttpRequest(), **params)
+        self.mock_subnet_create.assert_called_once_with(
+            test.IsHttpRequest(),
+            **subnet_params)
+        self._check_is_extension_supported({'network_availability_zone': 1,
+                                            'subnet_allocation': 1})
+
     @test.create_mocks({api.neutron: ('network_get',)})
     def test_network_update_get(self):
         network = self.networks.first()
diff --git a/openstack_dashboard/dashboards/project/networks/workflows.py b/openstack_dashboard/dashboards/project/networks/workflows.py
index 8106778f70..391d4ce3f9 100644
--- a/openstack_dashboard/dashboards/project/networks/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/workflows.py
@@ -316,6 +316,8 @@ class CreateSubnetInfoAction(workflows.Action):
             msg = _('Specify IP address of gateway or '
                     'check "Disable Gateway" checkbox.')
             raise forms.ValidationError(msg)
+        if no_gateway and 'gateway_ip' in self._errors:
+            del self._errors['gateway_ip']
 
     def clean(self):
         cleaned_data = super(CreateSubnetInfoAction, self).clean()
diff --git a/openstack_dashboard/test/helpers.py b/openstack_dashboard/test/helpers.py
index 83ba3089ba..d1c7eea042 100644
--- a/openstack_dashboard/test/helpers.py
+++ b/openstack_dashboard/test/helpers.py
@@ -385,6 +385,21 @@ class TestCase(horizon_helpers.TestCase):
         self.assertEqual(count, mocked_method.call_count)
         mocked_method.assert_has_calls([expected_call] * count)
 
+    def assertNoWorkflowErrors(self, response, context_name="workflow"):
+        """Checks for no workflow errors.
+
+        Asserts that the response either does not contain a workflow in its
+        context, or that if it does, that workflow has no errors.
+        """
+        context = getattr(response, "context", {})
+        if not context or context_name not in context:
+            return True
+        errors = [step.action._errors for step in
+                  response.context[context_name].steps]
+        self.assertEqual(
+            0, len(errors),
+            "Unexpected errors were found on the workflow: %s" % errors)
+
 
 class BaseAdminViewTests(TestCase):
     """Sets an active user with the "admin" role.