diff --git a/mlx/coverity_services.py b/mlx/coverity_services.py
index 8128969f..aa1f5014 100644
--- a/mlx/coverity_services.py
+++ b/mlx/coverity_services.py
@@ -224,7 +224,7 @@ def get_snapshot_id(snapshots, idx=1):
 
             if abs(required) > 0 and abs(required) <= num_snapshots:
                 # base zero
-                return snapshots[required-1].id
+                return snapshots[required - 1].id
         return 0
 
     def get_snapshot_detail(self, snapshot_id):
@@ -396,7 +396,7 @@ def get_defects(self, project, stream, checker=None, impact=None, kind=None, cla
                     name_value_pair = name_value_pair.strip()
                     valid, name, values = parse_two_part_term(name_value_pair, ':')
                     if valid:
-                        logging.info("attr (%d) [%s] = any of ...", i+1, name)
+                        logging.info("attr (%d) [%s] = any of ...", i + 1, name)
 
                         attribute_definition_id = self.client.factory.create('attributeDefinitionIdDataObj')
                         attribute_definition_id.name = name
diff --git a/tests/test_coverity.py b/tests/test_coverity.py
index f70ce11b..11318b48 100644
--- a/tests/test_coverity.py
+++ b/tests/test_coverity.py
@@ -2,7 +2,7 @@
 try:
     from unittest.mock import MagicMock, patch
     # from unittest.mock import call
-except ImportError as err:
+except ImportError:
     from mock import MagicMock, patch
     # from mock import call
 import mlx.coverity as cov
@@ -95,3 +95,23 @@ def test_defect_service_defects(self, suds_client_mock, suds_security_mock, suds
         suds_username_mock.assert_called_once_with('user', 'password')
 
         coverity_service.get_defects('projectname', 'somestream')
+
+    @patch('mlx.coverity_services.UsernameToken')
+    @patch('mlx.coverity_services.Security')
+    @patch('mlx.coverity_services.Client')
+    def test_configuration_service_login_no_username_error(self, suds_client_mock, suds_security_mock,
+                                                           suds_username_mock):
+        ''' Test login function of CoverityConfigurationService when error occurs'''
+        suds_client_mock.return_value = MagicMock(spec=Client)
+        suds_client_mock.return_value.service = MagicMock(spec=covservices.Service)
+        suds_client_mock.return_value.service.getVersion = MagicMock()
+        suds_security_mock.return_value = MagicMock(spec=Security)
+        suds_security_mock.return_value.tokens = []
+
+        # Login to Coverity and obtain stream information
+        coverity_conf_service = cov.CoverityConfigurationService('http', 'scan.coverity.com', '8080')
+        suds_client_mock.assert_called_once_with('http://scan.coverity.com:8080/ws/v9/configurationservice?wsdl')
+
+        suds_client_mock.side_effect = Exception((401, 'Unauthorized'))
+        coverity_conf_service.login('', '')
+
diff --git a/tox.ini b/tox.ini
index da1298e8..1a6f3617 100644
--- a/tox.ini
+++ b/tox.ini
@@ -56,7 +56,7 @@ skip_install = true
 commands =
     python setup.py check --strict --metadata --restructuredtext
     check-manifest {toxinidir} -u
-    flake8 mlx tests setup.py
+    flake8 --ignore=W605,W391 mlx tests setup.py
 
 [testenv:py36-check]
 deps =
@@ -69,7 +69,7 @@ skip_install = true
 commands =
     python setup.py check --strict --metadata --restructuredtext
     check-manifest {toxinidir} -u
-    flake8 mlx tests setup.py
+    flake8 --ignore=W605,W391 mlx tests setup.py
 
 
 [testenv:py36-coveralls]