diff --git a/tempest/api/compute/admin/test_quotas.py b/tempest/api/compute/admin/test_quotas.py
index 66d41b8..16f5828 100644
--- a/tempest/api/compute/admin/test_quotas.py
+++ b/tempest/api/compute/admin/test_quotas.py
@@ -17,12 +17,7 @@
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
-from tempest import config
-from tempest import exceptions
-from tempest.test import attr
-from tempest.test import skip_because
-
-CONF = config.CONF
+from tempest import test
 
 
 class QuotasAdminTestJSON(base.BaseV2ComputeAdminTest):
@@ -32,11 +27,8 @@
     @classmethod
     def setUpClass(cls):
         super(QuotasAdminTestJSON, cls).setUpClass()
-        cls.auth_url = cls.config.identity.uri
         cls.client = cls.os.quotas_client
         cls.adm_client = cls.os_adm.quotas_client
-        cls.identity_admin_client = cls._get_identity_admin_client()
-        cls.sg_client = cls.security_groups_client
 
         # NOTE(afazekas): these test cases should always create and use a new
         # tenant most of them should be skipped if we can't do that
@@ -51,7 +43,7 @@
                                      'instances', 'security_group_rules',
                                      'cores', 'security_groups'))
 
-    @attr(type='smoke')
+    @test.attr(type='smoke')
     def test_get_default_quotas(self):
         # Admin can get the default resource quota set for a tenant
         expected_quota_set = self.default_quota_set | set(['id'])
@@ -62,7 +54,7 @@
                          sorted(quota_set.keys()))
         self.assertEqual(quota_set['id'], self.demo_tenant_id)
 
-    @attr(type='gate')
+    @test.attr(type='gate')
     def test_update_all_quota_resources_for_tenant(self):
         # Admin can update all the resource quota limits for a tenant
         resp, default_quota_set = self.client.get_default_quota_set(
@@ -86,7 +78,7 @@
         self.assertEqual(new_quota_set, quota_set)
 
     # TODO(afazekas): merge these test cases
-    @attr(type='gate')
+    @test.attr(type='gate')
     def test_get_updated_quotas(self):
         # Verify that GET shows the updated quota set
         tenant_name = data_utils.rand_name('cpu_quota_tenant_')
@@ -104,119 +96,6 @@
         self.assertEqual(200, resp.status)
         self.assertEqual(quota_set['ram'], 5120)
 
-    # TODO(afazekas): Add dedicated tenant to the skiped quota tests
-    # it can be moved into the setUpClass as well
-    @attr(type='gate')
-    def test_create_server_when_cpu_quota_is_full(self):
-        # Disallow server creation when tenant's vcpu quota is full
-        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
-        default_vcpu_quota = quota_set['cores']
-        vcpu_quota = 0  # Set the quota to zero to conserve resources
-
-        resp, quota_set = self.adm_client.update_quota_set(self.demo_tenant_id,
-                                                           force=True,
-                                                           cores=vcpu_quota)
-
-        self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
-                        cores=default_vcpu_quota)
-        self.assertRaises(exceptions.OverLimit, self.create_test_server)
-
-    @attr(type='gate')
-    def test_create_server_when_memory_quota_is_full(self):
-        # Disallow server creation when tenant's memory quota is full
-        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
-        default_mem_quota = quota_set['ram']
-        mem_quota = 0  # Set the quota to zero to conserve resources
-
-        self.adm_client.update_quota_set(self.demo_tenant_id,
-                                         force=True,
-                                         ram=mem_quota)
-
-        self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
-                        ram=default_mem_quota)
-        self.assertRaises(exceptions.OverLimit, self.create_test_server)
-
-    @attr(type='gate')
-    def test_update_quota_normal_user(self):
-        self.assertRaises(exceptions.Unauthorized,
-                          self.client.update_quota_set,
-                          self.demo_tenant_id,
-                          ram=0)
-
-    @attr(type=['negative', 'gate'])
-    def test_create_server_when_instances_quota_is_full(self):
-        # Once instances quota limit is reached, disallow server creation
-        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
-        default_instances_quota = quota_set['instances']
-        instances_quota = 0  # Set quota to zero to disallow server creation
-
-        self.adm_client.update_quota_set(self.demo_tenant_id,
-                                         force=True,
-                                         instances=instances_quota)
-        self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
-                        instances=default_instances_quota)
-        self.assertRaises(exceptions.OverLimit, self.create_test_server)
-
-    @skip_because(bug="1186354",
-                  condition=CONF.service_available.neutron)
-    @attr(type=['negative', 'gate'])
-    def test_security_groups_exceed_limit(self):
-        # Negative test: Creation Security Groups over limit should FAIL
-
-        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
-        default_sg_quota = quota_set['security_groups']
-        sg_quota = 0  # Set the quota to zero to conserve resources
-
-        resp, quota_set =\
-            self.adm_client.update_quota_set(self.demo_tenant_id,
-                                             force=True,
-                                             security_groups=sg_quota)
-
-        self.addCleanup(self.adm_client.update_quota_set,
-                        self.demo_tenant_id,
-                        security_groups=default_sg_quota)
-
-        # Check we cannot create anymore
-        self.assertRaises(exceptions.OverLimit,
-                          self.sg_client.create_security_group,
-                          "sg-overlimit", "sg-desc")
-
-    @skip_because(bug="1186354",
-                  condition=CONF.service_available.neutron)
-    @attr(type=['negative', 'gate'])
-    def test_security_groups_rules_exceed_limit(self):
-        # Negative test: Creation of Security Group Rules should FAIL
-        # when we reach limit maxSecurityGroupRules
-
-        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
-        default_sg_rules_quota = quota_set['security_group_rules']
-        sg_rules_quota = 0  # Set the quota to zero to conserve resources
-
-        resp, quota_set =\
-            self.adm_client.update_quota_set(
-                self.demo_tenant_id,
-                force=True,
-                security_group_rules=sg_rules_quota)
-
-        self.addCleanup(self.adm_client.update_quota_set,
-                        self.demo_tenant_id,
-                        security_group_rules=default_sg_rules_quota)
-
-        s_name = data_utils.rand_name('securitygroup-')
-        s_description = data_utils.rand_name('description-')
-        resp, securitygroup =\
-            self.sg_client.create_security_group(s_name, s_description)
-        self.addCleanup(self.sg_client.delete_security_group,
-                        securitygroup['id'])
-
-        secgroup_id = securitygroup['id']
-        ip_protocol = 'tcp'
-
-        # Check we cannot create SG rule anymore
-        self.assertRaises(exceptions.OverLimit,
-                          self.sg_client.create_security_group_rule,
-                          secgroup_id, ip_protocol, 1025, 1025)
-
 
 class QuotasAdminTestXML(QuotasAdminTestJSON):
     _interface = 'xml'
diff --git a/tempest/api/compute/admin/test_quotas_negative.py b/tempest/api/compute/admin/test_quotas_negative.py
new file mode 100644
index 0000000..d3696a1
--- /dev/null
+++ b/tempest/api/compute/admin/test_quotas_negative.py
@@ -0,0 +1,155 @@
+# Copyright 2014 NEC Corporation.  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.compute import base
+from tempest.common.utils import data_utils
+from tempest import config
+from tempest import exceptions
+from tempest import test
+
+CONF = config.CONF
+
+
+class QuotasAdminNegativeTestJSON(base.BaseV2ComputeAdminTest):
+    _interface = 'json'
+    force_tenant_isolation = True
+
+    @classmethod
+    def setUpClass(cls):
+        super(QuotasAdminNegativeTestJSON, cls).setUpClass()
+        cls.client = cls.os.quotas_client
+        cls.adm_client = cls.os_adm.quotas_client
+        cls.sg_client = cls.security_groups_client
+
+        # NOTE(afazekas): these test cases should always create and use a new
+        # tenant most of them should be skipped if we can't do that
+        cls.demo_tenant_id = cls.isolated_creds.get_primary_user().get(
+            'tenantId')
+
+    @test.attr(type=['negative', 'gate'])
+    def test_update_quota_normal_user(self):
+        self.assertRaises(exceptions.Unauthorized,
+                          self.client.update_quota_set,
+                          self.demo_tenant_id,
+                          ram=0)
+
+    # TODO(afazekas): Add dedicated tenant to the skiped quota tests
+    # it can be moved into the setUpClass as well
+    @test.attr(type=['negative', 'gate'])
+    def test_create_server_when_cpu_quota_is_full(self):
+        # Disallow server creation when tenant's vcpu quota is full
+        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
+        default_vcpu_quota = quota_set['cores']
+        vcpu_quota = 0  # Set the quota to zero to conserve resources
+
+        resp, quota_set = self.adm_client.update_quota_set(self.demo_tenant_id,
+                                                           force=True,
+                                                           cores=vcpu_quota)
+
+        self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
+                        cores=default_vcpu_quota)
+        self.assertRaises(exceptions.OverLimit, self.create_test_server)
+
+    @test.attr(type=['negative', 'gate'])
+    def test_create_server_when_memory_quota_is_full(self):
+        # Disallow server creation when tenant's memory quota is full
+        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
+        default_mem_quota = quota_set['ram']
+        mem_quota = 0  # Set the quota to zero to conserve resources
+
+        self.adm_client.update_quota_set(self.demo_tenant_id,
+                                         force=True,
+                                         ram=mem_quota)
+
+        self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
+                        ram=default_mem_quota)
+        self.assertRaises(exceptions.OverLimit, self.create_test_server)
+
+    @test.attr(type=['negative', 'gate'])
+    def test_create_server_when_instances_quota_is_full(self):
+        # Once instances quota limit is reached, disallow server creation
+        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
+        default_instances_quota = quota_set['instances']
+        instances_quota = 0  # Set quota to zero to disallow server creation
+
+        self.adm_client.update_quota_set(self.demo_tenant_id,
+                                         force=True,
+                                         instances=instances_quota)
+        self.addCleanup(self.adm_client.update_quota_set, self.demo_tenant_id,
+                        instances=default_instances_quota)
+        self.assertRaises(exceptions.OverLimit, self.create_test_server)
+
+    @test.skip_because(bug="1186354",
+                       condition=CONF.service_available.neutron)
+    @test.attr(type='gate')
+    def test_security_groups_exceed_limit(self):
+        # Negative test: Creation Security Groups over limit should FAIL
+
+        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
+        default_sg_quota = quota_set['security_groups']
+        sg_quota = 0  # Set the quota to zero to conserve resources
+
+        resp, quota_set =\
+            self.adm_client.update_quota_set(self.demo_tenant_id,
+                                             force=True,
+                                             security_groups=sg_quota)
+
+        self.addCleanup(self.adm_client.update_quota_set,
+                        self.demo_tenant_id,
+                        security_groups=default_sg_quota)
+
+        # Check we cannot create anymore
+        self.assertRaises(exceptions.OverLimit,
+                          self.sg_client.create_security_group,
+                          "sg-overlimit", "sg-desc")
+
+    @test.skip_because(bug="1186354",
+                       condition=CONF.service_available.neutron)
+    @test.attr(type=['negative', 'gate'])
+    def test_security_groups_rules_exceed_limit(self):
+        # Negative test: Creation of Security Group Rules should FAIL
+        # when we reach limit maxSecurityGroupRules
+
+        resp, quota_set = self.client.get_quota_set(self.demo_tenant_id)
+        default_sg_rules_quota = quota_set['security_group_rules']
+        sg_rules_quota = 0  # Set the quota to zero to conserve resources
+
+        resp, quota_set =\
+            self.adm_client.update_quota_set(
+                self.demo_tenant_id,
+                force=True,
+                security_group_rules=sg_rules_quota)
+
+        self.addCleanup(self.adm_client.update_quota_set,
+                        self.demo_tenant_id,
+                        security_group_rules=default_sg_rules_quota)
+
+        s_name = data_utils.rand_name('securitygroup-')
+        s_description = data_utils.rand_name('description-')
+        resp, securitygroup =\
+            self.sg_client.create_security_group(s_name, s_description)
+        self.addCleanup(self.sg_client.delete_security_group,
+                        securitygroup['id'])
+
+        secgroup_id = securitygroup['id']
+        ip_protocol = 'tcp'
+
+        # Check we cannot create SG rule anymore
+        self.assertRaises(exceptions.OverLimit,
+                          self.sg_client.create_security_group_rule,
+                          secgroup_id, ip_protocol, 1025, 1025)
+
+
+class QuotasAdminNegativeTestXML(QuotasAdminNegativeTestJSON):
+    _interface = 'xml'