diff --git a/nsupdate/main/forms.py b/nsupdate/main/forms.py
index c8e3e3e..7fa6e8c 100644
--- a/nsupdate/main/forms.py
+++ b/nsupdate/main/forms.py
@@ -72,7 +72,7 @@ class EditDomainForm(forms.ModelForm):
 
             except (NameServerNotAvailable, ):
                 raise forms.ValidationError(
-                    _("Failed to add/delete a test host on %(domain)s, check your DNS server configuration. "
+                    _("Failed to add/delete host connectivity-test.%(domain)s, check your DNS server configuration. "
                       "This is a requirement for setting the available flag."),
                     code='invalid',
                     params={'domain': self.instance.name}