diff --git a/tempest/tests/lib/services/network/test_extensions_client.py b/tempest/tests/lib/services/network/test_extensions_client.py
new file mode 100644
index 0000000..27eb485
--- /dev/null
+++ b/tempest/tests/lib/services/network/test_extensions_client.py
@@ -0,0 +1,201 @@
+# Copyright 2017 AT&T 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.lib.services.network import extensions_client
+from tempest.tests.lib import fake_auth_provider
+from tempest.tests.lib.services import base
+
+
+class TestExtensionsClient(base.BaseServiceTest):
+
+    FAKE_EXTENSIONS = {
+        "extensions": [
+            {
+                "updated": "2013-01-20T00:00:00-00:00",
+                "name": "Neutron Service Type Management",
+                "links": [],
+                "alias": "service-type",
+                "description": "API for retrieving service providers for"
+                " Neutron advanced services"
+            },
+            {
+                "updated": "2012-10-05T10:00:00-00:00",
+                "name": "security-group",
+                "links": [],
+                "alias": "security-group",
+                "description": "The security groups extension."
+            },
+            {
+                "updated": "2013-02-07T10:00:00-00:00",
+                "name": "L3 Agent Scheduler",
+                "links": [],
+                "alias": "l3_agent_scheduler",
+                "description": "Schedule routers among l3 agents"
+            },
+            {
+                "updated": "2013-02-07T10:00:00-00:00",
+                "name": "Loadbalancer Agent Scheduler",
+                "links": [],
+                "alias": "lbaas_agent_scheduler",
+                "description": "Schedule pools among lbaas agents"
+            },
+            {
+                "updated": "2013-03-28T10:00:00-00:00",
+                "name": "Neutron L3 Configurable external gateway mode",
+                "links": [],
+                "alias": "ext-gw-mode",
+                "description":
+                "Extension of the router abstraction for specifying whether"
+                " SNAT should occur on the external gateway"
+            },
+            {
+                "updated": "2014-02-03T10:00:00-00:00",
+                "name": "Port Binding",
+                "links": [],
+                "alias": "binding",
+                "description": "Expose port bindings of a virtual port to"
+                " external application"
+            },
+            {
+                "updated": "2012-09-07T10:00:00-00:00",
+                "name": "Provider Network",
+                "links": [],
+                "alias": "provider",
+                "description": "Expose mapping of virtual networks to"
+                " physical networks"
+            },
+            {
+                "updated": "2013-02-03T10:00:00-00:00",
+                "name": "agent",
+                "links": [],
+                "alias": "agent",
+                "description": "The agent management extension."
+            },
+            {
+                "updated": "2012-07-29T10:00:00-00:00",
+                "name": "Quota management support",
+                "links": [],
+                "alias": "quotas",
+                "description": "Expose functions for quotas management per"
+                " tenant"
+            },
+            {
+                "updated": "2013-02-07T10:00:00-00:00",
+                "name": "DHCP Agent Scheduler",
+                "links": [],
+                "alias": "dhcp_agent_scheduler",
+                "description": "Schedule networks among dhcp agents"
+            },
+            {
+                "updated": "2013-06-27T10:00:00-00:00",
+                "name": "Multi Provider Network",
+                "links": [],
+                "alias": "multi-provider",
+                "description": "Expose mapping of virtual networks to"
+                " multiple physical networks"
+            },
+            {
+                "updated": "2013-01-14T10:00:00-00:00",
+                "name": "Neutron external network",
+                "links": [],
+                "alias": "external-net",
+                "description": "Adds external network attribute to network"
+                " resource."
+            },
+            {
+                "updated": "2012-07-20T10:00:00-00:00",
+                "name": "Neutron L3 Router",
+                "links": [],
+                "alias": "router",
+                "description": "Router abstraction for basic L3 forwarding"
+                " between L2 Neutron networks and access to external"
+                " networks via a NAT gateway."
+            },
+            {
+                "updated": "2013-07-23T10:00:00-00:00",
+                "name": "Allowed Address Pairs",
+                "links": [],
+                "alias": "allowed-address-pairs",
+                "description": "Provides allowed address pairs"
+            },
+            {
+                "updated": "2013-03-17T12:00:00-00:00",
+                "name": "Neutron Extra DHCP opts",
+                "links": [],
+                "alias": "extra_dhcp_opt",
+                "description": "Extra options configuration for DHCP. For"
+                " example PXE boot options to DHCP clients can be specified"
+                " (e.g. tftp-server, server-ip-address, bootfile-name)"
+            },
+            {
+                "updated": "2012-10-07T10:00:00-00:00",
+                "name": "LoadBalancing service",
+                "links": [],
+                "alias": "lbaas",
+                "description": "Extension for LoadBalancing service"
+            },
+            {
+                "updated": "2013-02-01T10:00:00-00:00",
+                "name": "Neutron Extra Route",
+                "links": [],
+                "alias": "extraroute",
+                "description": "Extra routes configuration for L3 router"
+            },
+            {
+                "updated": "2016-01-24T10:00:00-00:00",
+                "name": "Neutron Port Data Plane Status",
+                "links": [],
+                "alias": "data-plane-status",
+                "description": "Status of the underlying data plane."
+            }
+        ]
+    }
+
+    FAKE_EXTENSION_ALIAS = "service-type"
+
+    def setUp(self):
+        super(TestExtensionsClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.extensions_client = extensions_client.ExtensionsClient(
+            fake_auth, "network", "regionOne")
+
+    def _test_list_extensions(self, bytes_body=False):
+        self.check_service_client_function(
+            self.extensions_client.list_extensions,
+            "tempest.lib.common.rest_client.RestClient.get",
+            self.FAKE_EXTENSIONS,
+            bytes_body,
+            200)
+
+    def _test_show_extension(self, bytes_body=False):
+        self.check_service_client_function(
+            self.extensions_client.show_extension,
+            "tempest.lib.common.rest_client.RestClient.get",
+            {"extension": self.FAKE_EXTENSIONS["extensions"][0]},
+            bytes_body,
+            200,
+            ext_alias=self.FAKE_EXTENSION_ALIAS)
+
+    def test_list_extensions_with_str_body(self):
+        self._test_list_extensions()
+
+    def test_list_extensions_with_bytes_body(self):
+        self._test_list_extensions(bytes_body=True)
+
+    def test_show_extension_with_str_body(self):
+        self._test_show_extension()
+
+    def test_show_extension_with_bytes_body(self):
+        self._test_show_extension(bytes_body=True)