diff --git a/rhodecode/integrations/routes.py b/rhodecode/integrations/routes.py
--- a/rhodecode/integrations/routes.py
+++ b/rhodecode/integrations/routes.py
@@ -36,7 +36,7 @@ class ValidIntegrationPredicate(object):
         self.val = val
 
     def text(self):
-        return 'valid_integration_route = %s' % self.val
+        return f'valid_integration_route = {self.val}'
 
     phash = text
 
diff --git a/rhodecode/integrations/tests/test_integrations.py b/rhodecode/integrations/tests/test_integrations.py
--- a/rhodecode/integrations/tests/test_integrations.py
+++ b/rhodecode/integrations/tests/test_integrations.py
@@ -74,7 +74,7 @@ def _post_integration_test_helper(app, u
             ('__end__', 'settings:mapping'),
         ]
         errors_response = app.post(url, form_data)
-        assert 'Errors exist' in errors_response.body
+        assert 'Errors exist' in errors_response.text
 
         form_data[-2] = ('test_string_field', 'data!')
         assert Session().query(Integration).count() == 0
diff --git a/rhodecode/integrations/types/base.py b/rhodecode/integrations/types/base.py
--- a/rhodecode/integrations/types/base.py
+++ b/rhodecode/integrations/types/base.py
@@ -23,7 +23,9 @@ import string
 import collections
 import logging
 import requests
-import urllib.request, urllib.parse, urllib.error
+import urllib.request
+import urllib.parse
+import urllib.error
 from requests.adapters import HTTPAdapter
 from requests.packages.urllib3.util.retry import Retry
 
diff --git a/rhodecode/integrations/views.py b/rhodecode/integrations/views.py
--- a/rhodecode/integrations/views.py
+++ b/rhodecode/integrations/views.py
@@ -266,7 +266,7 @@ class IntegrationSettingsViewBase(BaseAp
         """
         _ = self.request.translate
 
-        controls = self.request.POST.items()
+        controls = list(self.request.POST.items())
         pstruct = peppercorn.parse(controls)
 
         if self.integration and pstruct.get('delete'):