diff --git a/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml b/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml
index c2742a3..7ceb9cc 100644
--- a/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml
+++ b/releasenotes/notes/add-new-identity-clients-as-library-5f7ndha733nwdsn9.yaml
@@ -1,12 +1,13 @@
 ---
 features:
   - |
-    Define identity service clients as libraries
+    Define identity service clients as libraries.
     Add new service clients to the library interface so the other projects can use these modules as stable libraries without
     any maintenance changes.
 
       * identity_client(v2)
       * groups_client(v3)
+      * trusts_client(v3)
       * users_client(v3)
       * identity_client(v3)
       * roles_client(v3)
diff --git a/tempest/services/identity/v3/json/trusts_client.py b/tempest/lib/services/identity/v3/trusts_client.py
similarity index 85%
rename from tempest/services/identity/v3/json/trusts_client.py
rename to tempest/lib/services/identity/v3/trusts_client.py
index f8ca9c6..e3d5a41 100644
--- a/tempest/services/identity/v3/json/trusts_client.py
+++ b/tempest/lib/services/identity/v3/trusts_client.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 from oslo_serialization import jsonutils as json
+from six.moves.urllib import parse as urllib
 
 from tempest.lib.common import rest_client
 
@@ -38,16 +39,16 @@
         self.expected_success(204, resp.status)
         return rest_client.ResponseBody(resp, body)
 
-    def list_trusts(self, trustor_user_id=None, trustee_user_id=None):
-        """GET trusts."""
-        if trustor_user_id:
-            resp, body = self.get("OS-TRUST/trusts?trustor_user_id=%s"
-                                  % trustor_user_id)
-        elif trustee_user_id:
-            resp, body = self.get("OS-TRUST/trusts?trustee_user_id=%s"
-                                  % trustee_user_id)
-        else:
-            resp, body = self.get("OS-TRUST/trusts")
+    def list_trusts(self, **params):
+        """Returns trusts
+
+        Available params: see http://developer.openstack.org/
+                              api-ref/identity/v3-ext/index.html#list-trusts
+        """
+        url = "OS-TRUST/trusts/"
+        if params:
+            url += '?%s' % urllib.urlencode(params)
+        resp, body = self.get(url)
         self.expected_success(200, resp.status)
         body = json.loads(body)
         return rest_client.ResponseBody(resp, body)
diff --git a/tempest/services/identity/v3/__init__.py b/tempest/services/identity/v3/__init__.py
index 2dff949..7b08307 100644
--- a/tempest/services/identity/v3/__init__.py
+++ b/tempest/services/identity/v3/__init__.py
@@ -23,14 +23,14 @@
 from tempest.lib.services.identity.v3.roles_client import RolesClient
 from tempest.lib.services.identity.v3.services_client import ServicesClient
 from tempest.lib.services.identity.v3.token_client import V3TokenClient
+from tempest.lib.services.identity.v3.trusts_client import TrustsClient
 from tempest.lib.services.identity.v3.users_client import UsersClient
 from tempest.services.identity.v3.json.credentials_client import \
     CredentialsClient
 from tempest.services.identity.v3.json.domains_client import DomainsClient
-from tempest.services.identity.v3.json.trusts_client import TrustsClient
 
 __all__ = ['EndPointsClient', 'GroupsClient', 'IdentityClient',
            'InheritedRolesClient', 'PoliciesClient', 'ProjectsClient',
            'RegionsClient', 'RolesClient', 'ServicesClient', 'V3TokenClient',
-           'UsersClient', 'CredentialsClient', 'DomainsClient',
-           'TrustsClient', ]
+           'TrustsClient', 'UsersClient', 'CredentialsClient', 'DomainsClient',
+           ]
diff --git a/tempest/tests/lib/services/identity/v3/test_trusts_client.py b/tempest/tests/lib/services/identity/v3/test_trusts_client.py
new file mode 100644
index 0000000..a1ca020
--- /dev/null
+++ b/tempest/tests/lib/services/identity/v3/test_trusts_client.py
@@ -0,0 +1,150 @@
+# Copyright 2016 Red Hat, Inc.
+#
+# 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.identity.v3 import trusts_client
+from tempest.tests.lib import fake_auth_provider
+from tempest.tests.lib.services import base
+
+
+class TestTrustsClient(base.BaseServiceTest):
+    FAKE_CREATE_TRUST = {
+        "trust": {
+            "expires_at": "2013-02-27T18:30:59.999999Z",
+            "impersonation": True,
+            "allow_redelegation": True,
+            "project_id": "ddef321",
+            "roles": [
+                {
+                    "name": "member"
+                    }
+                ],
+            "trustee_user_id": "86c0d5",
+            "trustor_user_id": "a0fdfd"
+            }
+        }
+
+    FAKE_LIST_TRUSTS = {
+        "trusts": [
+            {
+                "id": "1ff900",
+                "expires_at":
+                "2013-02-27T18:30:59.999999Z",
+                "impersonation": True,
+                "links": {
+                    "self":
+                    "http://example.com/identity/v3/OS-TRUST/trusts/1ff900"
+                    },
+                "project_id": "0f1233",
+                "trustee_user_id": "86c0d5",
+                "trustor_user_id": "a0fdfd"
+                },
+            {
+                "id": "f4513a",
+                "impersonation": False,
+                "links": {
+                    "self":
+                    "http://example.com/identity/v3/OS-TRUST/trusts/f45513a"
+                    },
+                "project_id": "0f1233",
+                "trustee_user_id": "86c0d5",
+                "trustor_user_id": "3cd2ce"
+                }
+            ]
+        }
+
+    FAKE_TRUST_INFO = {
+        "trust": {
+            "id": "987fe8",
+            "expires_at": "2013-02-27T18:30:59.999999Z",
+            "impersonation": True,
+            "links": {
+                "self":
+                "http://example.com/identity/v3/OS-TRUST/trusts/987fe8"
+                },
+            "roles": [
+                {
+                    "id": "ed7b78",
+                    "links": {
+                        "self":
+                        "http://example.com/identity/v3/roles/ed7b78"
+                        },
+                    "name": "member"
+                    }
+                ],
+            "roles_links": {
+                "next": None,
+                "previous": None,
+                "self":
+                "http://example.com/identity/v3/OS-TRUST/trusts/1ff900/roles"
+                },
+            "project_id": "0f1233",
+            "trustee_user_id": "be34d1",
+            "trustor_user_id": "56ae32"
+            }
+        }
+
+    def setUp(self):
+        super(TestTrustsClient, self).setUp()
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = trusts_client.TrustsClient(fake_auth, 'identity',
+                                                 'regionOne')
+
+    def _test_create_trust(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.create_trust,
+            'tempest.lib.common.rest_client.RestClient.post',
+            self.FAKE_CREATE_TRUST,
+            bytes_body,
+            status=201)
+
+    def _test_show_trust(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.show_trust,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_TRUST_INFO,
+            bytes_body,
+            trust_id="1ff900")
+
+    def _test_list_trusts(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.list_trusts,
+            'tempest.lib.common.rest_client.RestClient.get',
+            self.FAKE_LIST_TRUSTS,
+            bytes_body)
+
+    def test_create_trust_with_str_body(self):
+        self._test_create_trust()
+
+    def test_create_trust_with_bytes_body(self):
+        self._test_create_trust(bytes_body=True)
+
+    def test_show_trust_with_str_body(self):
+        self._test_show_trust()
+
+    def test_show_trust_with_bytes_body(self):
+        self._test_show_trust(bytes_body=True)
+
+    def test_list_trusts_with_str_body(self):
+        self._test_list_trusts()
+
+    def test_list_trusts_with_bytes_body(self):
+        self._test_list_trusts(bytes_body=True)
+
+    def test_delete_trust(self):
+        self.check_service_client_function(
+            self.client.delete_trust,
+            'tempest.lib.common.rest_client.RestClient.delete',
+            {},
+            trust_id="1ff900",
+            status=204)