diff --git a/openstack_dashboard/dashboards/project/networks/subnets/workflows.py b/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
index c3ed96bfb4..4c381fbd16 100644
--- a/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/subnets/workflows.py
@@ -32,6 +32,7 @@ LOG = logging.getLogger(__name__)
 class CreateSubnetInfoAction(network_workflows.CreateSubnetInfoAction):
     with_subnet = forms.BooleanField(initial=True, required=False,
                                      widget=forms.HiddenInput())
+    msg = _('Specify "Network Address"')
 
     class Meta:
         name = _("Subnet")
diff --git a/openstack_dashboard/dashboards/project/networks/workflows.py b/openstack_dashboard/dashboards/project/networks/workflows.py
index 3efa96653a..a2fa53d0b9 100644
--- a/openstack_dashboard/dashboards/project/networks/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/workflows.py
@@ -121,6 +121,8 @@ class CreateSubnetInfoAction(workflows.Action):
         mask=False)
     no_gateway = forms.BooleanField(label=_("Disable Gateway"),
                                     initial=False, required=False)
+    msg = _('Specify "Network Address" or '
+            'clear "Create Subnet" checkbox.')
 
     class Meta:
         name = _("Subnet")
@@ -143,9 +145,7 @@ class CreateSubnetInfoAction(workflows.Action):
         gateway_ip = cleaned_data.get('gateway_ip')
         no_gateway = cleaned_data.get('no_gateway')
         if not cidr:
-            msg = _('Specify "Network Address" or '
-                    'clear "Create Subnet" checkbox.')
-            raise forms.ValidationError(msg)
+            raise forms.ValidationError(self.msg)
         if cidr:
             subnet = netaddr.IPNetwork(cidr)
             if subnet.version != ip_version: