diff --git a/requirements.txt b/requirements.txt
index ddd2a6b..c0a9254 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,6 +22,6 @@
 iso8601>=0.1.9
 fixtures>=1.3.1
 testscenarios>=0.4
-tempest-lib>=0.9.0
+tempest-lib>=0.10.0
 PyYAML>=3.1.0
 stevedore>=1.5.0 # Apache-2.0
diff --git a/tempest/api/compute/images/test_images.py b/tempest/api/compute/images/test_images.py
index 0324df2..dc62620 100644
--- a/tempest/api/compute/images/test_images.py
+++ b/tempest/api/compute/images/test_images.py
@@ -14,6 +14,7 @@
 
 from tempest.api.compute import base
 from tempest.common.utils import data_utils
+from tempest.common import waiters
 from tempest import config
 from tempest import test
 
@@ -48,3 +49,18 @@
                                               name=snapshot_name,
                                               wait_until='SAVING')
         self.client.delete_image(image['id'])
+
+    @test.idempotent_id('aaacd1d0-55a2-4ce8-818a-b5439df8adc9')
+    def test_create_image_from_stopped_server(self):
+        server = self.create_test_server(wait_until='ACTIVE')
+        self.servers_client.stop_server(server['id'])
+        waiters.wait_for_server_status(self.servers_client,
+                                       server['id'], 'SHUTOFF')
+        self.addCleanup(self.servers_client.delete_server, server['id'])
+        snapshot_name = data_utils.rand_name('test-snap')
+        image = self.create_image_from_server(server['id'],
+                                              name=snapshot_name,
+                                              wait_until='ACTIVE',
+                                              wait_for_server=False)
+        self.addCleanup(self.client.delete_image, image['id'])
+        self.assertEqual(snapshot_name, image['name'])
diff --git a/tempest/api/compute/images/test_images_negative.py b/tempest/api/compute/images/test_images_negative.py
index 126d092..9197adf 100644
--- a/tempest/api/compute/images/test_images_negative.py
+++ b/tempest/api/compute/images/test_images_negative.py
@@ -71,22 +71,6 @@
                           '!@#$%^&*()', name=name, meta=meta)
 
     @test.attr(type=['negative'])
-    @test.idempotent_id('aaacd1d0-55a2-4ce8-818a-b5439df8adc9')
-    def test_create_image_from_stopped_server(self):
-        server = self.create_test_server(wait_until='ACTIVE')
-        self.servers_client.stop_server(server['id'])
-        waiters.wait_for_server_status(self.servers_client,
-                                       server['id'], 'SHUTOFF')
-        self.addCleanup(self.servers_client.delete_server, server['id'])
-        snapshot_name = data_utils.rand_name('test-snap')
-        image = self.create_image_from_server(server['id'],
-                                              name=snapshot_name,
-                                              wait_until='ACTIVE',
-                                              wait_for_server=False)
-        self.addCleanup(self.client.delete_image, image['id'])
-        self.assertEqual(snapshot_name, image['name'])
-
-    @test.attr(type=['negative'])
     @test.idempotent_id('ec176029-73dc-4037-8d72-2e4ff60cf538')
     def test_create_image_specify_uuid_35_characters_or_less(self):
         # Return an error if Image ID passed is 35 characters or less
diff --git a/tempest/common/preprov_creds.py b/tempest/common/preprov_creds.py
index e154842..eac7f4e 100644
--- a/tempest/common/preprov_creds.py
+++ b/tempest/common/preprov_creds.py
@@ -249,7 +249,7 @@
             'utf-8'), None)
         # The force kwarg is used to allocate an additional set of creds with
         # the same role list. The index used for the previously allocation
-        # in the preprov_creds dict will be moved.
+        # in the _creds dict will be moved.
         if exist_creds and not force_new:
             return exist_creds
         elif exist_creds and force_new:
diff --git a/tempest/scenario/test_network_v6.py b/tempest/scenario/test_network_v6.py
index a9394cb..3df92cf 100644
--- a/tempest/scenario/test_network_v6.py
+++ b/tempest/scenario/test_network_v6.py
@@ -143,8 +143,9 @@
                  self._list_ports(device_id=sid,
                                   network_id=self.network_v6.id)]
         self.assertEqual(1, len(ports),
-                         message="Multiple IPv6 ports found on network %s"
-                         % self.network_v6)
+                         message=("Multiple IPv6 ports found on network %s. "
+                                  "ports: %s")
+                         % (self.network_v6, ports))
         mac6 = ports[0]
         ssh.turn_nic_on(ssh.get_nic_name(mac6))
 
diff --git a/tempest/services/compute/json/fixed_ips_client.py b/tempest/services/compute/json/fixed_ips_client.py
index d826655..7b374aa 100644
--- a/tempest/services/compute/json/fixed_ips_client.py
+++ b/tempest/services/compute/json/fixed_ips_client.py
@@ -33,4 +33,4 @@
         url = "os-fixed-ips/%s/action" % fixed_ip
         resp, body = self.post(url, json.dumps(kwargs))
         self.validate_response(schema.reserve_unreserve_fixed_ip, resp, body)
-        return service_client.ResponseBody(resp)
+        return service_client.ResponseBody(resp, body)
diff --git a/tempest/tests/services/compute/test_fixedIPs_client.py b/tempest/tests/services/compute/test_fixedIPs_client.py
index 5acb422..b537baa 100644
--- a/tempest/tests/services/compute/test_fixedIPs_client.py
+++ b/tempest/tests/services/compute/test_fixedIPs_client.py
@@ -44,3 +44,16 @@
 
     def test_show_fixed_ip_with_bytes_body(self):
         self._test_show_fixed_ip(True)
+
+    def _test_reserve_fixed_ip(self, bytes_body=False):
+        self.check_service_client_function(
+            self.fixedIPsClient.reserve_fixed_ip,
+            'tempest.common.service_client.ServiceClient.post',
+            {}, bytes_body,
+            status=202, fixed_ip='Identifier')
+
+    def test_reserve_fixed_ip_with_str_body(self):
+        self._test_reserve_fixed_ip()
+
+    def test_reserve_fixed_ip_with_bytes_body(self):
+        self._test_reserve_fixed_ip(True)