diff --git a/fuelweb_test/testrail/builds.py b/fuelweb_test/testrail/builds.py
index 4019bfec2..5c2598042 100644
--- a/fuelweb_test/testrail/builds.py
+++ b/fuelweb_test/testrail/builds.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import json
 import re
 
diff --git a/fuelweb_test/testrail/generate_statistics.py b/fuelweb_test/testrail/generate_statistics.py
index f924d983f..951401342 100644
--- a/fuelweb_test/testrail/generate_statistics.py
+++ b/fuelweb_test/testrail/generate_statistics.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import json
 import os
 import re
@@ -181,8 +183,7 @@ class TestRunStatistics(object):
             self.run['name'], self.run['config'] or 'default config'))
 
         for test in self.tests:
-            logger.debug('Checking "{0}" test...'.format(
-                test['title'].encode('utf8')))
+            logger.debug('Checking "{0}" test...'.format(test['title']))
             test_results = sorted(
                 self.project.get_results_for_test(test['id'], self.results),
                 key=lambda x: x['id'], reverse=True)
@@ -359,7 +360,7 @@ class StatisticsGenerator(object):
             index = 1
             for tid, params in values['tests'].items():
                 if index > 1:
-                    link_text = str(index)
+                    link_text = '{}'.format(index)
                 else:
                     link_text = '{0} on {1}'.format(params['group'],
                                                     params['config'])
@@ -396,7 +397,7 @@ class StatisticsGenerator(object):
             index = 1
             for tid, params in values['tests'].items():
                 if index > 1:
-                    link_text = str(index)
+                    link_text = '{}'.format(index)
                 else:
                     link_text = '{0} on {1}'.format(params['group'],
                                                     params['config'])
diff --git a/fuelweb_test/testrail/report.py b/fuelweb_test/testrail/report.py
index db9fb8e7c..742ede4c8 100755
--- a/fuelweb_test/testrail/report.py
+++ b/fuelweb_test/testrail/report.py
@@ -15,6 +15,7 @@
 #    under the License.
 
 from __future__ import division
+from __future__ import unicode_literals
 
 import functools
 import re
diff --git a/fuelweb_test/testrail/report_pi.py b/fuelweb_test/testrail/report_pi.py
index 68a8a812f..7b82d03c3 100644
--- a/fuelweb_test/testrail/report_pi.py
+++ b/fuelweb_test/testrail/report_pi.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import json
 
 from logging import DEBUG
diff --git a/fuelweb_test/testrail/report_tempest_results.py b/fuelweb_test/testrail/report_tempest_results.py
index a288b974d..b1a8b0c5f 100644
--- a/fuelweb_test/testrail/report_tempest_results.py
+++ b/fuelweb_test/testrail/report_tempest_results.py
@@ -14,6 +14,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import optparse
 from xml.etree import ElementTree
 
diff --git a/fuelweb_test/testrail/settings.py b/fuelweb_test/testrail/settings.py
index be7fd3506..98608e938 100644
--- a/fuelweb_test/testrail/settings.py
+++ b/fuelweb_test/testrail/settings.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import logging
 import os
 
diff --git a/fuelweb_test/testrail/testrail.py b/fuelweb_test/testrail/testrail.py
index eff39a310..4e00e8293 100644
--- a/fuelweb_test/testrail/testrail.py
+++ b/fuelweb_test/testrail/testrail.py
@@ -23,6 +23,8 @@
 # Copyright Gurock Software GmbH. See license.md for details.
 #
 
+from __future__ import unicode_literals
+
 import base64
 import json
 import time
@@ -114,8 +116,8 @@ class APIClient(object):
         if method == 'POST':
             request.add_data(json.dumps(data))
         auth = base64.encodestring(
-            '%s:%s' % (self.user, self.password)).strip()
-        request.add_header('Authorization', 'Basic %s' % auth)
+            '{0}:{1}'.format(self.user, self.password)).strip()
+        request.add_header('Authorization', 'Basic {}'.format(auth))
         request.add_header('Content-Type', 'application/json')
 
         e = None
diff --git a/fuelweb_test/testrail/testrail_client.py b/fuelweb_test/testrail/testrail_client.py
index d11d710f7..870b69e44 100644
--- a/fuelweb_test/testrail/testrail_client.py
+++ b/fuelweb_test/testrail/testrail_client.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 from fuelweb_test.testrail.settings import logger
 from fuelweb_test.testrail.testrail import APIClient
 from fuelweb_test.testrail.testrail import APIError
diff --git a/fuelweb_test/testrail/upload_cases_description.py b/fuelweb_test/testrail/upload_cases_description.py
index 1c3fe8bf1..6089e88c7 100644
--- a/fuelweb_test/testrail/upload_cases_description.py
+++ b/fuelweb_test/testrail/upload_cases_description.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import re
 
 from logging import DEBUG
diff --git a/fuelweb_test/testrail/upload_tempest_test_suite.py b/fuelweb_test/testrail/upload_tempest_test_suite.py
index 3f1b8d6fe..9d092ab8d 100644
--- a/fuelweb_test/testrail/upload_tempest_test_suite.py
+++ b/fuelweb_test/testrail/upload_tempest_test_suite.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from __future__ import unicode_literals
+
 import subprocess
 
 from joblib import Parallel, delayed