diff --git a/tcp_tests/fixtures/oss_fixtures.py b/tcp_tests/fixtures/oss_fixtures.py
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+++ b/tcp_tests/fixtures/oss_fixtures.py
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+#    Copyright 2016 Mirantis, 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.
+
+import os
+
+import pytest
+import yaml
+
+from tcp_tests import logger
+from tcp_tests.helpers import ext
+from tcp_tests import settings
+from tcp_tests.managers import oss_manager
+
+LOG = logger.logger
+
+
+@pytest.fixture(scope='function')
+def oss_actions(config, underlay, salt_actions):
+    """Fixture that provides various actions for OSS
+
+    :param config: fixture provides oslo.config
+    :param underlay: fixture provides underlay manager
+    :rtype: OSSManager
+    """
+    return oss_manager.OSSManager(config, underlay, salt_actions)
+
+
+@pytest.mark.revert_snapshot(ext.SNAPSHOT.oss_deployed)
+@pytest.fixture(scope='function')
+def oss_deployed(revert_snapshot, request, config,
+                 hardware, underlay, salt_deployed,
+                 oss_actions):
+    """Fixture to get or install OSS on the environment
+
+    :param revert_snapshot: fixture that reverts snapshot that is specified
+                            in test with @pytest.mark.revert_snapshot(<name>)
+    :param request: fixture provides pytest data
+    :param config: fixture provides oslo.config
+    :param hardware: fixture provides enviromnet manager
+    :param underlay: fixture provides underlay manager
+    :param oss_actions: fixture provides OSSManager instance
+    :rtype: OSSManager
+
+    If config.oss.oss_installed is not set, this
+    fixture assumes that the OSS were not installed
+    , and do the following:
+    - install OSS
+    - make snapshot with name 'oss_deployed'
+    - return OSSManager
+
+    If config.oss.oss_installed was set, this fixture
+    assumes that the OSS were already installed, and do
+    the following:
+    - return OSSManager instance
+
+    If you want to revert 'oss_deployed' snapshot, please use mark:
+    @pytest.mark.revert_snapshot("oss_deployed")
+    """
+    if not config.oss.oss_installed:
+        steps_path = config.oss_deploy.oss_steps_path
+        commands = underlay.read_template(steps_path)
+        oss_actions.install(commands)
+        hardware.create_snapshot(ext.SNAPSHOT.oss_deployed)
+
+    else:
+        # 1. hardware environment created and powered on
+        # 2. config.underlay.ssh contains SSH access to provisioned nodes
+        #    (can be passed from external config with TESTS_CONFIGS variable)
+        # 3. config.tcp.* options contain access credentials to the already
+        #    installed TCP API endpoint
+        pass
+
+    return oss_actions