diff --git a/tempest/hacking/checks.py b/tempest/hacking/checks.py
index f4b76e5e9e..d1bc141823 100644
--- a/tempest/hacking/checks.py
+++ b/tempest/hacking/checks.py
@@ -151,7 +151,7 @@ def no_testtools_skip_decorator(logical_line):
 
 def _common_service_clients_check(logical_line, physical_line, filename,
                                   ignored_list_file=None):
-    if 'tempest/services/' not in filename:
+    if not re.match('tempest/(lib/)?services/.*', filename):
         return False
 
     if ignored_list_file is not None:
diff --git a/tempest/lib/services/compute/flavors_client.py b/tempest/lib/services/compute/flavors_client.py
index 6869f02017..e377c8448c 100644
--- a/tempest/lib/services/compute/flavors_client.py
+++ b/tempest/lib/services/compute/flavors_client.py
@@ -133,7 +133,9 @@ class FlavorsClient(base_compute_client.BaseComputeClient):
             resp, body)
         return rest_client.ResponseBody(resp, body)
 
-    def unset_flavor_extra_spec(self, flavor_id, key):
+    def unset_flavor_extra_spec(self, flavor_id, key):  # noqa
+        # NOTE: This noqa is for passing T111 check and we cannot rename
+        #       to keep backwards compatibility.
         """Unset extra Specs from the mentioned flavor."""
         resp, body = self.delete('flavors/%s/os-extra_specs/%s' %
                                  (flavor_id, key))
diff --git a/tempest/lib/services/compute/hosts_client.py b/tempest/lib/services/compute/hosts_client.py
index 01437651a3..16b5edda67 100644
--- a/tempest/lib/services/compute/hosts_client.py
+++ b/tempest/lib/services/compute/hosts_client.py
@@ -61,7 +61,11 @@ class HostsClient(base_compute_client.BaseComputeClient):
         self.validate_response(schema.update_host, resp, body)
         return rest_client.ResponseBody(resp, body)
 
-    def startup_host(self, hostname):
+    def startup_host(self, hostname):  # noqa
+        # NOTE: This noqa is for passing T110 check and we cannot rename
+        #       to keep backwards compatibility. Actually, the root problem
+        #       of this is a wrong API design. GET operation should not change
+        #       resource status, but current API does that.
         """Startup a host."""
 
         resp, body = self.get("os-hosts/%s/startup" % hostname)
@@ -69,7 +73,11 @@ class HostsClient(base_compute_client.BaseComputeClient):
         self.validate_response(schema.startup_host, resp, body)
         return rest_client.ResponseBody(resp, body)
 
-    def shutdown_host(self, hostname):
+    def shutdown_host(self, hostname):  # noqa
+        # NOTE: This noqa is for passing T110 check and we cannot rename
+        #       to keep backwards compatibility. Actually, the root problem
+        #       of this is a wrong API design. GET operation should not change
+        #       resource status, but current API does that.
         """Shutdown a host."""
 
         resp, body = self.get("os-hosts/%s/shutdown" % hostname)
@@ -77,7 +85,11 @@ class HostsClient(base_compute_client.BaseComputeClient):
         self.validate_response(schema.shutdown_host, resp, body)
         return rest_client.ResponseBody(resp, body)
 
-    def reboot_host(self, hostname):
+    def reboot_host(self, hostname):  # noqa
+        # NOTE: This noqa is for passing T110 check and we cannot rename
+        #       to keep backwards compatibility. Actually, the root problem
+        #       of this is a wrong API design. GET operation should not change
+        #       resource status, but current API does that.
         """Reboot a host."""
 
         resp, body = self.get("os-hosts/%s/reboot" % hostname)
diff --git a/tempest/lib/services/compute/hypervisor_client.py b/tempest/lib/services/compute/hypervisor_client.py
index 5dcecc9920..23c304e836 100644
--- a/tempest/lib/services/compute/hypervisor_client.py
+++ b/tempest/lib/services/compute/hypervisor_client.py
@@ -63,7 +63,9 @@ class HypervisorClient(base_compute_client.BaseComputeClient):
         self.validate_response(schema.get_hypervisor_uptime, resp, body)
         return rest_client.ResponseBody(resp, body)
 
-    def search_hypervisor(self, hypervisor_name):
+    def search_hypervisor(self, hypervisor_name):  # noqa
+        # NOTE: This noqa is for passing T110 check and we cannot rename
+        #       to keep backwards compatibility.
         """Search specified hypervisor."""
         resp, body = self.get('os-hypervisors/%s/search' % hypervisor_name)
         body = json.loads(body)
diff --git a/tempest/lib/services/network/quotas_client.py b/tempest/lib/services/network/quotas_client.py
index b5cf35b95d..752b253f46 100644
--- a/tempest/lib/services/network/quotas_client.py
+++ b/tempest/lib/services/network/quotas_client.py
@@ -22,7 +22,9 @@ class QuotasClient(base.BaseNetworkClient):
         uri = '/quotas/%s' % tenant_id
         return self.update_resource(uri, put_body)
 
-    def reset_quotas(self, tenant_id):
+    def reset_quotas(self, tenant_id):  # noqa
+        # NOTE: This noqa is for passing T111 check and we cannot rename
+        #       to keep backwards compatibility.
         uri = '/quotas/%s' % tenant_id
         return self.delete_resource(uri)