diff --git a/fuelweb_test/helpers/metaclasses.py b/fuelweb_test/helpers/metaclasses.py
index 6e1e79bcf..f84787bb3 100644
--- a/fuelweb_test/helpers/metaclasses.py
+++ b/fuelweb_test/helpers/metaclasses.py
@@ -12,6 +12,16 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from warnings import warn
+
+warn(
+    'fuelweb_test.helpers.metaclasses.SingletonMeta is deprected:'
+    'class is moved to devops.helpers.metaclasses.\n'
+    'Due to it was single metaclass in file, this file will be deleted in a'
+    'short time!',
+    DeprecationWarning
+)
+
 
 class SingletonMeta(type):
     """Metaclass for Singleton
diff --git a/fuelweb_test/helpers/os_actions.py b/fuelweb_test/helpers/os_actions.py
index 8a08b7e30..518be5ce9 100644
--- a/fuelweb_test/helpers/os_actions.py
+++ b/fuelweb_test/helpers/os_actions.py
@@ -378,6 +378,9 @@ class OpenStackActions(common.Common):
             '{}'.format("".join(traceback.format_stack())))
         warn(msg, DeprecationWarning)
         logger.warning(msg)
+        logger.critical(
+            'This method could be deleted on 01.09.2016 '
+            'without any announcement!')
         if not creds:
             creds = (
                 SSH_IMAGE_CREDENTIALS['username'],
diff --git a/fuelweb_test/helpers/ssh_manager.py b/fuelweb_test/helpers/ssh_manager.py
index dfed1630f..1e55551c4 100644
--- a/fuelweb_test/helpers/ssh_manager.py
+++ b/fuelweb_test/helpers/ssh_manager.py
@@ -20,6 +20,7 @@ import traceback
 from warnings import warn
 
 from devops.helpers.helpers import wait
+from devops.helpers.metaclasses import SingletonMeta
 from devops.models.node import SSHClient
 from paramiko import RSAKey
 from paramiko.ssh_exception import AuthenticationException
@@ -27,13 +28,11 @@ import six
 import yaml
 
 from fuelweb_test import logger
-from fuelweb_test.helpers.metaclasses import SingletonMeta
 from fuelweb_test.settings import SSH_FUEL_CREDENTIALS
 from fuelweb_test.settings import SSH_SLAVE_CREDENTIALS
 
 
-@six.add_metaclass(SingletonMeta)
-class SSHManager(object):
+class SSHManager(six.with_metaclass(SingletonMeta, object)):
 
     def __init__(self):
         logger.debug('SSH_MANAGER: Run constructor SSHManager')
diff --git a/fuelweb_test/helpers/utils.py b/fuelweb_test/helpers/utils.py
index ad08475bd..78c9b7ad4 100644
--- a/fuelweb_test/helpers/utils.py
+++ b/fuelweb_test/helpers/utils.py
@@ -16,6 +16,7 @@ from __future__ import division
 
 import copy
 # pylint: disable=no-name-in-module
+# noinspection PyUnresolvedReferences
 from distutils import version
 # pylint: enable=no-name-in-module
 import inspect
@@ -466,6 +467,8 @@ def run_on_remote(*args, **kwargs):
         '{}'.format("".join(traceback.format_stack())))
     warn(msg, DeprecationWarning)
     logger.warning(msg)
+    logger.critical(
+        'This method could be deleted on 01.09.2016 without any announcement!')
     if 'jsonify' in kwargs:
         if kwargs['jsonify']:
             return run_on_remote_get_results(*args, **kwargs)['stdout_json']
@@ -497,6 +500,8 @@ def run_on_remote_get_results(remote, cmd, clear=False, err_msg=None,
         '{}'.format("".join(traceback.format_stack())))
     warn(msg, DeprecationWarning)
     logger.warning(msg)
+    logger.critical(
+        'This method could be deleted on 01.09.2016 without any announcement!')
     if assert_ec_equal is None:
         assert_ec_equal = [0]
     orig_result = remote.check_call(
diff --git a/fuelweb_test/models/environment.py b/fuelweb_test/models/environment.py
index 1a75f78de..12bec4704 100644
--- a/fuelweb_test/models/environment.py
+++ b/fuelweb_test/models/environment.py
@@ -21,6 +21,7 @@ from warnings import warn
 from devops.helpers.helpers import tcp_ping_
 from devops.helpers.helpers import wait_pass
 from devops.helpers.helpers import wait
+from devops.helpers.metaclasses import SingletonMeta
 from devops.helpers.ntp import sync_time
 from devops.models import Environment
 from keystoneauth1 import exceptions
@@ -31,7 +32,6 @@ import six
 from fuelweb_test.helpers.decorators import revert_info
 from fuelweb_test.helpers.decorators import update_rpm_packages
 from fuelweb_test.helpers.decorators import upload_manifests
-from fuelweb_test.helpers.metaclasses import SingletonMeta
 from fuelweb_test.helpers.eb_tables import Ebtables
 from fuelweb_test.helpers.fuel_actions import AdminActions
 from fuelweb_test.helpers.fuel_actions import BaseActions
@@ -54,8 +54,7 @@ from fuelweb_test import QuietLogger
 from fuelweb_test import logger
 
 
-@six.add_metaclass(SingletonMeta)
-class EnvironmentModel(object):
+class EnvironmentModel(six.with_metaclass(SingletonMeta, object)):
     """EnvironmentModel."""  # TODO documentation
 
     def __init__(self, config=None):
@@ -750,6 +749,9 @@ class EnvironmentModel(object):
             '{}'.format("".join(traceback.format_stack())))
         warn(msg, DeprecationWarning)
         logger.warning(msg)
+        logger.critical(
+            'This method could be deleted on 01.09.2016 '
+            'without any announcement!')
         result = remote.check_call(
             command=cmd,
             expected=[exit_code],
diff --git a/system_test/core/repository.py b/system_test/core/repository.py
index ea7a2f66b..fdf298aa2 100644
--- a/system_test/core/repository.py
+++ b/system_test/core/repository.py
@@ -14,12 +14,12 @@
 
 import re
 
+from devops.helpers.metaclasses import SingletonMeta
 import proboscis.core
 from proboscis import factory
 from proboscis.decorators import DEFAULT_REGISTRY
 from six import add_metaclass
 
-from fuelweb_test.helpers.metaclasses import SingletonMeta
 from system_test.tests import ActionTest
 from system_test.core.discover import config_filter