diff --git a/.gitignore b/.gitignore
index 1406240..b95cff5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,6 +38,7 @@ nosetests.xml
 .mr.developer.cfg
 .project
 .pydevproject
+.idea/
 
 # Complexity
 output/*.html
diff --git a/monasca_tempest_tests/tests/log_api/base.py b/monasca_tempest_tests/tests/log_api/base.py
index e4e57e2..3df6728 100644
--- a/monasca_tempest_tests/tests/log_api/base.py
+++ b/monasca_tempest_tests/tests/log_api/base.py
@@ -14,12 +14,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import codecs
 import random
 import string
 
 from oslo_config import cfg
-import six
 from tempest.common import credentials_factory as cred_factory
 from tempest import exceptions
 from tempest import test
@@ -122,61 +120,3 @@ class BaseLogsTestCase(test.BaseTestCase):
                 method(resource_id)
             except exceptions.EndpointNotFound:
                 pass
-
-
-def _hex_to_unicode(hex_raw):
-    hex_raw = six.b(hex_raw.replace(' ', ''))
-    hex_str_raw = codecs.getdecoder('hex')(hex_raw)[0]
-    hex_str = hex_str_raw.decode('utf-8', 'replace')
-    return hex_str
-
-# NOTE(trebskit) => http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt
-UNICODE_MESSAGES = [
-    # Unicode is evil...
-    {'case': 'arabic', 'input': 'يونيكود هو الشر'},
-    {'case': 'polish', 'input': 'Unicode to zło'},
-    {'case': 'greek', 'input': 'Unicode είναι κακό'},
-    {'case': 'portuguese', 'input': 'Unicode é malvado'},
-    {'case': 'lao', 'input': 'unicode ເປັນຄວາມຊົ່ວຮ້າຍ'},
-    {'case': 'german', 'input': 'Unicode ist böse'},
-    {'case': 'japanese', 'input': 'ユニコードは悪です'},
-    {'case': 'russian', 'input': 'Unicode - зло'},
-    {'case': 'urdu', 'input': 'یونیسیڈ برائی ہے'},
-    {'case': 'weird', 'input': '🆄🅽🅸🅲🅾🅳🅴 🅸🆂 🅴🆅🅸🅻...'},  # funky, huh ?
-    # conditions from link above
-    # 2.3  Other boundary conditions
-    {'case': 'stress_2_3_1', 'input': _hex_to_unicode('ed 9f bf')},
-    {'case': 'stress_2_3_2', 'input': _hex_to_unicode('ee 80 80')},
-    {'case': 'stress_2_3_3', 'input': _hex_to_unicode('ef bf bd')},
-    {'case': 'stress_2_3_4', 'input': _hex_to_unicode('f4 8f bf bf')},
-    {'case': 'stress_2_3_5', 'input': _hex_to_unicode('f4 90 80 80')},
-    # 3.5 Impossible byes
-    {'case': 'stress_3_5_1', 'input': _hex_to_unicode('fe')},
-    {'case': 'stress_3_5_2', 'input': _hex_to_unicode('ff')},
-    {'case': 'stress_3_5_3', 'input': _hex_to_unicode('fe fe ff ff')},
-    # 4.1 Examples of an overlong ASCII character
-    {'case': 'stress_4_1_1', 'input': _hex_to_unicode('c0 af')},
-    {'case': 'stress_4_1_2', 'input': _hex_to_unicode('e0 80 af')},
-    {'case': 'stress_4_1_3', 'input': _hex_to_unicode('f0 80 80 af')},
-    {'case': 'stress_4_1_4', 'input': _hex_to_unicode('f8 80 80 80 af')},
-    {'case': 'stress_4_1_5', 'input': _hex_to_unicode('fc 80 80 80 80 af')},
-    # 4.2 Maximum overlong sequences
-    {'case': 'stress_4_2_1', 'input': _hex_to_unicode('c1 bf')},
-    {'case': 'stress_4_2_2', 'input': _hex_to_unicode('e0 9f bf')},
-    {'case': 'stress_4_2_3', 'input': _hex_to_unicode('f0 8f bf bf')},
-    {'case': 'stress_4_2_4', 'input': _hex_to_unicode('f8 87 bf bf bf')},
-    {'case': 'stress_4_2_5', 'input': _hex_to_unicode('fc 83 bf bf bf bf')},
-    # 4.3  Overlong representation of the NUL character
-    {'case': 'stress_4_3_1', 'input': _hex_to_unicode('c0 80')},
-    {'case': 'stress_4_3_2', 'input': _hex_to_unicode('e0 80 80')},
-    {'case': 'stress_4_3_3', 'input': _hex_to_unicode('f0 80 80 80')},
-    {'case': 'stress_4_3_4', 'input': _hex_to_unicode('f8 80 80 80 80')},
-    {'case': 'stress_4_3_5', 'input': _hex_to_unicode('fc 80 80 80 80 80')},
-    # and some cheesy example from polish novel 'Pan Tadeusz'
-    {'case': 'mr_t', 'input': 'Hajże na Soplicę!'},
-    # it won't be complete without that one
-    {'case': 'mr_b', 'input': 'Grzegorz Brzęczyszczykiewicz, '
-                              'Chrząszczyżewoszyce, powiat Łękołody'},
-    # great success, christmas time
-    {'case': 'olaf', 'input': '☃'}
-]
diff --git a/monasca_tempest_tests/tests/log_api/test_unicode.py b/monasca_tempest_tests/tests/log_api/test_unicode.py
index ecc4ff1..0174fca 100644
--- a/monasca_tempest_tests/tests/log_api/test_unicode.py
+++ b/monasca_tempest_tests/tests/log_api/test_unicode.py
@@ -15,11 +15,12 @@
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
+from monasca_common.tests.validation import test_metric_validation
 from monasca_tempest_tests.tests.log_api import base
 
 _RETRY_COUNT = 15
 _RETRY_WAIT = 2
-_UNICODE_CASES = base.UNICODE_MESSAGES
+_UNICODE_CASES = test_metric_validation.UNICODE_MESSAGES
 
 
 class TestUnicodeV3(base.BaseLogsTestCase):
diff --git a/requirements.txt b/requirements.txt
index 71183cf..3e5b06e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ oslo.utils>=3.33.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 mock>=2.0.0 # BSD
+monasca-common>=2.8.0 # Apache-2.0