diff --git a/tempest/api/network/test_security_groups.py b/tempest/api/network/test_security_groups.py
index 914dcff..9218f0c 100644
--- a/tempest/api/network/test_security_groups.py
+++ b/tempest/api/network/test_security_groups.py
@@ -17,7 +17,6 @@
 
 from tempest.api.network import base
 from tempest.common.utils import data_utils
-from tempest import exceptions
 from tempest.test import attr
 
 
@@ -124,19 +123,6 @@
                      for rule in rule_list_body['security_group_rules']]
         self.assertIn(rule_create_body['security_group_rule']['id'], rule_list)
 
-    @attr(type=['negative', 'smoke'])
-    def test_show_non_existent_security_group(self):
-        non_exist_id = data_utils.rand_name('secgroup-')
-        self.assertRaises(exceptions.NotFound, self.client.show_security_group,
-                          non_exist_id)
-
-    @attr(type=['negative', 'smoke'])
-    def test_show_non_existent_security_group_rule(self):
-        non_exist_id = data_utils.rand_name('rule-')
-        self.assertRaises(exceptions.NotFound,
-                          self.client.show_security_group_rule,
-                          non_exist_id)
-
 
 class SecGroupTestXML(SecGroupTest):
     _interface = 'xml'
diff --git a/tempest/api/network/test_security_groups_negative.py b/tempest/api/network/test_security_groups_negative.py
new file mode 100644
index 0000000..d321e23
--- /dev/null
+++ b/tempest/api/network/test_security_groups_negative.py
@@ -0,0 +1,42 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 OpenStack Foundation
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.api.network import test_security_groups as base
+from tempest import exceptions
+from tempest.test import attr
+import uuid
+
+
+class NegativeSecGroupTest(base.SecGroupTest):
+    _interface = 'json'
+
+    @attr(type=['negative', 'smoke'])
+    def test_show_non_existent_security_group(self):
+        non_exist_id = str(uuid.uuid4())
+        self.assertRaises(exceptions.NotFound, self.client.show_security_group,
+                          non_exist_id)
+
+    @attr(type=['negative', 'smoke'])
+    def test_show_non_existent_security_group_rule(self):
+        non_exist_id = str(uuid.uuid4())
+        self.assertRaises(exceptions.NotFound,
+                          self.client.show_security_group_rule,
+                          non_exist_id)
+
+
+class NegativeSecGroupTestXML(NegativeSecGroupTest):
+    _interface = 'xml'