diff --git a/openstack_dashboard/dashboards/admin/networks/subnets/tests.py b/openstack_dashboard/dashboards/admin/networks/subnets/tests.py
index 0e71f725ca..8b889f7228 100644
--- a/openstack_dashboard/dashboards/admin/networks/subnets/tests.py
+++ b/openstack_dashboard/dashboards/admin/networks/subnets/tests.py
@@ -126,9 +126,8 @@ class NetworkSubnetTests(test.BaseAdminViewTests):
         redir_url = reverse(NETWORKS_DETAIL_URL, args=[subnet.network_id])
         self.assertRedirectsNoFollow(res, redir_url)
 
-        self.assert_mock_multiple_calls_with_same_arguments(
-            self.mock_network_get, 2,
-            mock.call(test.IsHttpRequest(), network.id))
+        self.mock_network_get.assert_called_once_with(test.IsHttpRequest(),
+                                                      network.id)
         self._check_is_extension_supported({'subnet_allocation': 1})
         self.mock_subnetpool_list.assert_called_once_with(test.IsHttpRequest())
         self.mock_subnet_create.assert_called_once_with(
@@ -184,9 +183,8 @@ class NetworkSubnetTests(test.BaseAdminViewTests):
         redir_url = reverse(NETWORKS_DETAIL_URL, args=[subnet.network_id])
         self.assertRedirectsNoFollow(res, redir_url)
 
-        self.assert_mock_multiple_calls_with_same_arguments(
-            self.mock_network_get, 2,
-            mock.call(test.IsHttpRequest(), network.id))
+        self.mock_network_get.assert_called_once_with(test.IsHttpRequest(),
+                                                      network.id)
         self._check_is_extension_supported({'subnet_allocation': 1})
         self.mock_subnetpool_list.assert_called_once_with(test.IsHttpRequest())
         self.mock_subnet_create.assert_called_once_with(
diff --git a/openstack_dashboard/dashboards/admin/networks/subnets/workflows.py b/openstack_dashboard/dashboards/admin/networks/subnets/workflows.py
index 72e2521058..cec55876a8 100644
--- a/openstack_dashboard/dashboards/admin/networks/subnets/workflows.py
+++ b/openstack_dashboard/dashboards/admin/networks/subnets/workflows.py
@@ -17,9 +17,6 @@ import logging
 from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
-from horizon import exceptions
-
-from openstack_dashboard import api
 from openstack_dashboard.dashboards.project.networks.subnets \
     import workflows as project_workflows
 from openstack_dashboard.dashboards.project.networks import workflows \
@@ -52,27 +49,21 @@ class CreateSubnet(project_workflows.CreateSubnet):
 
     def get_success_url(self):
         return reverse("horizon:admin:networks:detail",
-                       args=(self.context.get('network_id'),))
+                       args=(self.context['network'].id,))
 
     def get_failure_url(self):
         return reverse("horizon:admin:networks:detail",
-                       args=(self.context.get('network_id'),))
+                       args=(self.context['network'].id,))
 
     def handle(self, request, data):
-        try:
-            # We must specify tenant_id of the network which a subnet is
-            # created for if admin user does not belong to the tenant.
-            network = api.neutron.network_get(request,
-                                              self.context['network_id'])
-        except Exception as e:
-            LOG.info('Failed to retrieve network %(id)s for a subnet: %(exc)s',
-                     {'id': data['network_id'], 'exc': e})
-            msg = (_('Failed to retrieve network %s for a subnet') %
-                   data['network_id'])
-            redirect = self.get_failure_url()
-            exceptions.handle(request, msg, redirect=redirect)
-        subnet = self._create_subnet(request, data,
-                                     tenant_id=network.tenant_id)
+        network = self.context_seed['network']
+        # NOTE: network argument is required to show error message correctly.
+        # NOTE: We must specify tenant_id of the network which a subnet is
+        # created for if admin user does not belong to the tenant.
+        subnet = self._create_subnet(
+            request, data,
+            network=network,
+            tenant_id=network.tenant_id)
         return True if subnet else False
 
 
diff --git a/openstack_dashboard/dashboards/project/networks/subnets/tests.py b/openstack_dashboard/dashboards/project/networks/subnets/tests.py
index 518a324007..598a3c091c 100644
--- a/openstack_dashboard/dashboards/project/networks/subnets/tests.py
+++ b/openstack_dashboard/dashboards/project/networks/subnets/tests.py
@@ -185,7 +185,7 @@ class NetworkSubnetTests(test.TestCase):
     def test_subnet_create_post_with_additional_attributes(self):
         network = self.networks.list()[1]
         subnet = self.subnets.list()[2]
-        self.mock_network_get.return_value = self.networks.first()
+        self.mock_network_get.return_value = network
         self.mock_is_extension_supported.return_value = True
         self.mock_subnetpool_list.return_value = self.subnetpools.list()
         self.mock_subnet_create.return_value = subnet
diff --git a/openstack_dashboard/dashboards/project/networks/subnets/views.py b/openstack_dashboard/dashboards/project/networks/subnets/views.py
index 0ab085da38..13e54c57eb 100644
--- a/openstack_dashboard/dashboards/project/networks/subnets/views.py
+++ b/openstack_dashboard/dashboards/project/networks/subnets/views.py
@@ -52,8 +52,7 @@ class CreateView(DefaultSubnetWorkflowMixin, workflows.WorkflowView):
 
     def get_initial(self):
         network = self.get_object()
-        return {"network_id": self.kwargs['network_id'],
-                "network_name": network.name_or_id,
+        return {"network": network,
                 "dns_nameservers": self.get_default_dns_servers()}
 
 
diff --git a/openstack_dashboard/dashboards/project/networks/subnets/workflows.py b/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
index ae7dd9cd5a..9e1ab9b3b4 100644
--- a/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
@@ -50,7 +50,7 @@ class CreateSubnetInfoAction(network_workflows.CreateSubnetInfoAction):
 
 class CreateSubnetInfo(network_workflows.CreateSubnetInfo):
     action_class = CreateSubnetInfoAction
-    depends_on = ("network_id",)
+    depends_on = ("network",)
 
 
 class CreateSubnet(network_workflows.CreateNetwork):
@@ -68,14 +68,16 @@ class CreateSubnet(network_workflows.CreateNetwork):
 
     def get_success_url(self):
         return reverse("horizon:project:networks:detail",
-                       args=(self.context.get('network_id'),))
+                       args=(self.context['network'].id,))
 
     def get_failure_url(self):
         return reverse("horizon:project:networks:detail",
-                       args=(self.context.get('network_id'),))
+                       args=(self.context['network'].id,))
 
     def handle(self, request, data):
-        subnet = self._create_subnet(request, data)
+        network = self.context_seed['network']
+        # network argument is required to show error message correctly.
+        subnet = self._create_subnet(request, data, network=network)
         return True if subnet else False