diff --git a/.zuul.yaml b/.zuul.yaml
new file mode 100644
index 0000000..ddbc398
--- /dev/null
+++ b/.zuul.yaml
@@ -0,0 +1,5 @@
+- project:
+    templates:
+      - openstack-python38-jobs-no-constraints
+      - check-requirements
+      - publish-to-pypi
diff --git a/iotronic/api/controllers/v1/location.py b/iotronic/api/controllers/v1/location.py
index 8f4bc76..dea46b6 100644
--- a/iotronic/api/controllers/v1/location.py
+++ b/iotronic/api/controllers/v1/location.py
@@ -31,7 +31,7 @@ class Location(base.APIBase):
         fields = list(objects.Location.fields)
         for k in fields:
             # Skip fields we do not expose.
-            if k is not 'created_at':
+            if k != 'created_at':
                 if not hasattr(self, k):
                     continue
                 self.fields.append(k)
diff --git a/iotronic/api/controllers/v1/types.py b/iotronic/api/controllers/v1/types.py
index 30f7254..fa23de1 100644
--- a/iotronic/api/controllers/v1/types.py
+++ b/iotronic/api/controllers/v1/types.py
@@ -327,6 +327,7 @@ class LocalLinkConnectionType(wtypes.UserType):
             return None
         return LocalLinkConnectionType.validate(value)
 
+
 locallinkconnectiontype = LocalLinkConnectionType()
 
 
diff --git a/iotronic/conductor/endpoints.py b/iotronic/conductor/endpoints.py
index 8a7fb56..7cdae95 100644
--- a/iotronic/conductor/endpoints.py
+++ b/iotronic/conductor/endpoints.py
@@ -43,7 +43,7 @@ serializer = objects_base.IotronicObjectSerializer()
 
 Port = list()
 
-SERVICE_PORT_LIST = None
+SERVICE_PORT_LIST = []
 
 
 def versionCompare(v1, v2):
diff --git a/iotronic/objects/plugin.py b/iotronic/objects/plugin.py
index 201a06f..66c34af 100644
--- a/iotronic/objects/plugin.py
+++ b/iotronic/objects/plugin.py
@@ -204,7 +204,6 @@ class Plugin(base.IotronicObject):
         """
         current = self.__class__.get_by_uuid(self._context, self.uuid)
         for field in self.fields:
-            if (hasattr(
-                    self, base.get_attrname(field))
-                    and self[field] != current[field]):
-                        self[field] = current[field]
+            if (hasattr(self, base.get_attrname(field))
+            and self[field] != current[field]):
+                self[field] = current[field]
diff --git a/tox.ini b/tox.ini
index 99020df..ed81ad6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.3.1
-envlist = py35,pep8
+envlist = py38,pep8
 skipsdist = True
 
 [testenv]
@@ -19,12 +19,30 @@ commands =
     find . -type f -name "*.pyc" -delete
 
 [testenv:pep8]
-basepython = python2.7
+basepython = python3.8
+#commands = /usr/local/bin/flake8 {posargs}
 commands = flake8 {posargs}
 
+[testenv:venv]
+commands = {posargs}
+
+[testenv:cover]
+commands = python3 setup.py test --coverage --testr-args='{posargs}'
+
+[testenv:docs]
+commands =
+  rm -fr doc/build
+  python3 setup.py build_sphinx
+
+[testenv:releasenotes]
+commands =
+  sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
+
 [testenv:py35]
 basepython = python3.5
 
+[testenv:py38]
+basepython = python3.8
 
 [flake8]
 # TODO(dmllr): Analyze or fix the warnings blacklisted below
@@ -35,5 +53,7 @@ basepython = python3.5
 # E123, E125 skipped as they are invalid PEP-8.
 show-source = True
 builtins = _
-ignore = E711,E712,H404,H405,E123,E125,E901,H301
+#ignore = E711,E712,H404,H405,E123,E125,E901,H301
+ignore = E121,E122,E123,E124,E125,E126,E127,E128,E129,E131,E251,E711,E712,H405,W504,E731,H238,E126,E128,E731,H405,N530,W504,E129,E741,W503,F821,F999,F841,E402,W605
+
 exclude = .venv,.git,.tox,dist,doc,etc,*lib/python*,*egg,build