diff --git a/tempest/api/compute/admin/test_flavors.py b/tempest/api/compute/admin/test_flavors.py
index 75b8dad..05bb457 100644
--- a/tempest/api/compute/admin/test_flavors.py
+++ b/tempest/api/compute/admin/test_flavors.py
@@ -80,13 +80,7 @@
         self.assertEqual(flavor['rxtx_factor'], self.rxtx)
         self.assertEqual(flavor['OS-FLV-EXT-DATA:ephemeral'],
                          self.ephemeral)
-        if self._interface == "xml":
-            XMLNS_OS_FLV_ACCESS = "http://docs.openstack.org/compute/ext/"\
-                "flavor_access/api/v2"
-            key = "{" + XMLNS_OS_FLV_ACCESS + "}is_public"
-            self.assertEqual(flavor[key], "True")
-        if self._interface == "json":
-            self.assertEqual(flavor['os-flavor-access:is_public'], True)
+        self.assertEqual(flavor['os-flavor-access:is_public'], True)
 
         # Verify flavor is retrieved
         resp, flavor = self.client.get_flavor_details(new_flavor_id)
@@ -156,6 +150,14 @@
     def test_create_list_flavor_without_extra_data(self):
         # Create a flavor and ensure it is listed
         # This operation requires the user to have 'admin' role
+
+        def verify_flavor_response_extension(flavor):
+            # check some extensions for the flavor create/show/detail response
+            self.assertEqual(flavor['swap'], '')
+            self.assertEqual(int(flavor['rxtx_factor']), 1)
+            self.assertEqual(int(flavor['OS-FLV-EXT-DATA:ephemeral']), 0)
+            self.assertEqual(flavor['os-flavor-access:is_public'], True)
+
         flavor_name = rand_name(self.flavor_name_prefix)
         new_flavor_id = rand_int_id(start=1000)
 
@@ -171,26 +173,20 @@
         self.assertEqual(flavor['vcpus'], self.vcpus)
         self.assertEqual(flavor['disk'], self.disk)
         self.assertEqual(int(flavor['id']), new_flavor_id)
-        self.assertEqual(flavor['swap'], '')
-        self.assertEqual(int(flavor['rxtx_factor']), 1)
-        self.assertEqual(int(flavor['OS-FLV-EXT-DATA:ephemeral']), 0)
-        if self._interface == "xml":
-            XMLNS_OS_FLV_ACCESS = "http://docs.openstack.org/compute/ext/"\
-                "flavor_access/api/v2"
-            key = "{" + XMLNS_OS_FLV_ACCESS + "}is_public"
-            self.assertEqual(flavor[key], "True")
-        if self._interface == "json":
-            self.assertEqual(flavor['os-flavor-access:is_public'], True)
+        verify_flavor_response_extension(flavor)
 
         # Verify flavor is retrieved
         resp, flavor = self.client.get_flavor_details(new_flavor_id)
         self.assertEqual(resp.status, 200)
         self.assertEqual(flavor['name'], flavor_name)
+        verify_flavor_response_extension(flavor)
+
         # Check if flavor is present in list
-        resp, flavors = self.client.list_flavors_with_detail()
+        resp, flavors = self.user_client.list_flavors_with_detail()
         self.assertEqual(resp.status, 200)
         for flavor in flavors:
             if flavor['name'] == flavor_name:
+                verify_flavor_response_extension(flavor)
                 flag = True
         self.assertTrue(flag)
 
diff --git a/tempest/api/compute/admin/test_flavors_extra_specs.py b/tempest/api/compute/admin/test_flavors_extra_specs.py
index 0fd4d11..403a946 100644
--- a/tempest/api/compute/admin/test_flavors_extra_specs.py
+++ b/tempest/api/compute/admin/test_flavors_extra_specs.py
@@ -19,7 +19,6 @@
 from tempest.api.compute import base
 from tempest.common.utils.data_utils import rand_int_id
 from tempest.common.utils.data_utils import rand_name
-from tempest import exceptions
 from tempest.test import attr
 
 
@@ -64,9 +63,9 @@
         super(FlavorsExtraSpecsTestJSON, cls).tearDownClass()
 
     @attr(type='gate')
-    def test_flavor_set_get_unset_keys(self):
-        # Test to SET, GET UNSET flavor extra spec as a user
-        # with admin privileges.
+    def test_flavor_set_get_update_show_unset_keys(self):
+        # Test to SET, GET, UPDATE, SHOW, UNSET flavor extra
+        # spec as a user with admin privileges.
         # Assigning extra specs values that are to be set
         specs = {"key1": "value1", "key2": "value2"}
         # SET extra specs to the flavor created in setUp
@@ -79,55 +78,55 @@
             self.client.get_flavor_extra_spec(self.flavor['id'])
         self.assertEqual(get_resp.status, 200)
         self.assertEqual(get_body, specs)
+
+        # UPDATE the value of the extra specs key1
+        update_resp, update_body = \
+            self.client.update_flavor_extra_spec(self.flavor['id'],
+                                                 "key1",
+                                                 key1="value")
+        self.assertEqual(update_resp.status, 200)
+        self.assertEqual({"key1": "value"}, update_body)
+
         # GET a key value and verify
-        get_resp, get_body = \
+        show_resp, get_body = \
             self.client.get_flavor_extra_spec_with_key(self.flavor['id'],
-                                                       "key2")
+                                                       "key1")
+        self.assertEqual(show_resp.status, 200)
+        self.assertEqual(get_body, 'value')
+
+        # GET extra specs and verify the value of the key2
+        # is the same as before
+        get_resp, get_body = \
+            self.client.get_flavor_extra_spec(self.flavor['id'])
         self.assertEqual(get_resp.status, 200)
-        self.assertEqual(get_body, specs['key2'])
+        self.assertEqual(get_body, {"key1": "value", "key2": "value2"})
+
         # UNSET extra specs that were set in this test
         unset_resp, _ = \
             self.client.unset_flavor_extra_spec(self.flavor['id'], "key1")
         self.assertEqual(unset_resp.status, 200)
-
-    @attr(type=['negative', 'gate'])
-    def test_flavor_non_admin_set_keys(self):
-        # Test to SET flavor extra spec as a user without admin privileges.
-        specs = {"key1": "value1", "key2": "value2"}
-        self.assertRaises(exceptions.Unauthorized,
-                          self.flavors_client.set_flavor_extra_spec,
-                          self.flavor['id'],
-                          specs)
+        unset_resp, _ = \
+            self.client.unset_flavor_extra_spec(self.flavor['id'], "key2")
+        self.assertEqual(unset_resp.status, 200)
 
     @attr(type='gate')
-    def test_flavor_non_admin_get_keys(self):
+    def test_flavor_non_admin_get_all_keys_and_specified_key(self):
         specs = {"key1": "value1", "key2": "value2"}
         set_resp, set_body = self.client.set_flavor_extra_spec(
             self.flavor['id'], specs)
         resp, body = self.flavors_client.get_flavor_extra_spec(
             self.flavor['id'])
         self.assertEqual(resp.status, 200)
+
         for key in specs:
             self.assertEqual(body[key], specs[key])
 
-    @attr(type=['negative', 'gate'])
-    def test_flavor_non_admin_unset_keys(self):
-        specs = {"key1": "value1", "key2": "value2"}
-        set_resp, set_body = self.client.set_flavor_extra_spec(
-            self.flavor['id'], specs)
-
-        self.assertRaises(exceptions.Unauthorized,
-                          self.flavors_client.unset_flavor_extra_spec,
-                          self.flavor['id'],
-                          'key1')
-
-    @attr(type=['negative', 'gate'])
-    def test_flavor_unset_nonexistent_key(self):
-        nonexistent_key = rand_name('flavor_key')
-        self.assertRaises(exceptions.NotFound,
-                          self.client.unset_flavor_extra_spec,
-                          self.flavor['id'],
-                          nonexistent_key)
+        get_resp, get_body = \
+            self.flavors_client.get_flavor_extra_spec_with_key(
+                self.flavor['id'],
+                "key1")
+        self.assertEqual(get_resp.status, 200)
+        self.assertEqual("value1", get_body)
 
 
 class FlavorsExtraSpecsTestXML(FlavorsExtraSpecsTestJSON):
diff --git a/tempest/api/compute/admin/test_flavors_extra_specs_negative.py b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
new file mode 100644
index 0000000..8d62a2a
--- /dev/null
+++ b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
@@ -0,0 +1,118 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2012 OpenStack Foundation
+# All Rights Reserved.
+# Copyright 2013 IBM Corp.
+#
+#    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 import compute
+from tempest.api.compute import base
+from tempest.common.utils.data_utils import rand_int_id
+from tempest.common.utils.data_utils import rand_name
+from tempest import exceptions
+from tempest.test import attr
+
+
+class FlavorsExtraSpecsNegativeTestJSON(base.BaseV2ComputeAdminTest):
+    """the Negative tests for FlavorsExtraSpecs."""
+
+    _interface = 'json'
+
+    @classmethod
+    def setUpClass(cls):
+        super(FlavorsExtraSpecsNegativeTestJSON, cls).setUpClass()
+        if not compute.FLAVOR_EXTRA_DATA_ENABLED:
+            msg = "FlavorExtraData extension not enabled."
+            raise cls.skipException(msg)
+
+        cls.client = cls.os_adm.flavors_client
+        flavor_name = rand_name('test_flavor')
+        ram = 512
+        vcpus = 1
+        disk = 10
+        ephemeral = 10
+        cls.new_flavor_id = rand_int_id(start=1000)
+        swap = 1024
+        rxtx = 1
+        # Create a flavor
+        resp, cls.flavor = cls.client.create_flavor(flavor_name,
+                                                    ram, vcpus,
+                                                    disk,
+                                                    cls.new_flavor_id,
+                                                    ephemeral=ephemeral,
+                                                    swap=swap, rxtx=rxtx)
+
+    @classmethod
+    def tearDownClass(cls):
+        resp, body = cls.client.delete_flavor(cls.flavor['id'])
+        cls.client.wait_for_resource_deletion(cls.flavor['id'])
+        super(FlavorsExtraSpecsNegativeTestJSON, cls).tearDownClass()
+
+    @attr(type=['negative', 'gate'])
+    def test_flavor_non_admin_set_keys(self):
+        # Test to SET flavor extra spec as a user without admin privileges.
+        specs = {"key1": "value1", "key2": "value2"}
+        self.assertRaises(exceptions.Unauthorized,
+                          self.flavors_client.set_flavor_extra_spec,
+                          self.flavor['id'],
+                          specs)
+
+    @attr(type=['negative', 'gate'])
+    def test_flavor_non_admin_unset_keys(self):
+        specs = {"key1": "value1", "key2": "value2"}
+        set_resp, set_body = self.client.set_flavor_extra_spec(
+            self.flavor['id'], specs)
+
+        self.assertRaises(exceptions.Unauthorized,
+                          self.flavors_client.unset_flavor_extra_spec,
+                          self.flavor['id'],
+                          'key1')
+
+    @attr(type=['negative', 'gate'])
+    def test_flavor_unset_nonexistent_key(self):
+        nonexistent_key = rand_name('flavor_key')
+        self.assertRaises(exceptions.NotFound,
+                          self.client.unset_flavor_extra_spec,
+                          self.flavor['id'],
+                          nonexistent_key)
+
+    @attr(type=['negative', 'gate'])
+    def test_flavor_get_nonexistent_key(self):
+        self.assertRaises(exceptions.NotFound,
+                          self.flavors_client.get_flavor_extra_spec_with_key,
+                          self.flavor['id'],
+                          "nonexistent_key")
+
+    @attr(type=['negative', 'gate'])
+    def test_flavor_update_mismatch_key(self):
+        # the key will be updated should be match the key in the body
+        self.assertRaises(exceptions.BadRequest,
+                          self.client.update_flavor_extra_spec,
+                          self.flavor['id'],
+                          "key2",
+                          key1="value")
+
+    @attr(type=['negative', 'gate'])
+    def test_flavor_update_more_key(self):
+        # there should be just one item in the request body
+        self.assertRaises(exceptions.BadRequest,
+                          self.client.update_flavor_extra_spec,
+                          self.flavor['id'],
+                          "key1",
+                          key1="value",
+                          key2="value")
+
+
+class FlavorsExtraSpecsNegativeTestXML(FlavorsExtraSpecsNegativeTestJSON):
+    _interface = 'xml'
diff --git a/tempest/services/compute/json/flavors_client.py b/tempest/services/compute/json/flavors_client.py
index dc05e3e..305a77b 100644
--- a/tempest/services/compute/json/flavors_client.py
+++ b/tempest/services/compute/json/flavors_client.py
@@ -109,6 +109,14 @@
         body = json.loads(body)
         return resp, body[key]
 
+    def update_flavor_extra_spec(self, flavor_id, key, **kwargs):
+        """Gets specified extra Specs details of the mentioned flavor."""
+        resp, body = self.put('flavors/%s/os-extra_specs/%s' %
+                              (flavor_id, key),
+                              json.dumps(kwargs), self.headers)
+        body = json.loads(body)
+        return resp, body
+
     def unset_flavor_extra_spec(self, flavor_id, key):
         """Unsets extra Specs from the mentioned flavor."""
         return self.delete('flavors/%s/os-extra_specs/%s' % (str(flavor_id),
diff --git a/tempest/services/compute/xml/flavors_client.py b/tempest/services/compute/xml/flavors_client.py
index c7ed044..12e24d0 100644
--- a/tempest/services/compute/xml/flavors_client.py
+++ b/tempest/services/compute/xml/flavors_client.py
@@ -22,6 +22,7 @@
 from tempest.common.rest_client import RestClientXML
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
+from tempest.services.compute.xml.common import Text
 from tempest.services.compute.xml.common import xml_to_json
 from tempest.services.compute.xml.common import XMLNS_11
 
@@ -29,7 +30,7 @@
 XMLNS_OS_FLV_EXT_DATA = \
     "http://docs.openstack.org/compute/ext/flavor_extra_data/api/v1.1"
 XMLNS_OS_FLV_ACCESS = \
-    "http://docs.openstack.org/compute/ext/flavor_access/api/v1.1"
+    "http://docs.openstack.org/compute/ext/flavor_access/api/v2"
 
 
 class FlavorsClientXML(RestClientXML):
@@ -49,6 +50,10 @@
             if k == '{%s}ephemeral' % XMLNS_OS_FLV_EXT_DATA:
                 k = 'OS-FLV-EXT-DATA:ephemeral'
 
+            if k == '{%s}is_public' % XMLNS_OS_FLV_ACCESS:
+                k = 'os-flavor-access:is_public'
+                v = True if v == 'True' else False
+
             if k == 'extra_specs':
                 k = 'OS-FLV-WITH-EXT-SPECS:extra_specs'
                 flavor[k] = dict(v)
@@ -155,6 +160,21 @@
         body = xml_to_json(etree.fromstring(body))
         return resp, body
 
+    def update_flavor_extra_spec(self, flavor_id, key, **kwargs):
+        """Gets specified extra Specs details of the mentioned flavor."""
+        doc = Document()
+        for (k, v) in kwargs.items():
+            element = Element(k)
+            doc.append(element)
+            value = Text(v)
+            element.append(value)
+
+        resp, body = self.put('flavors/%s/os-extra_specs/%s' %
+                              (flavor_id, key),
+                              str(doc), self.headers)
+        body = xml_to_json(etree.fromstring(body))
+        return resp, {key: body}
+
     def unset_flavor_extra_spec(self, flavor_id, key):
         """Unsets an extra spec based on the mentioned flavor and key."""
         return self.delete('flavors/%s/os-extra_specs/%s' % (str(flavor_id),