diff --git a/.zuul.yaml b/.zuul.yaml
index 0435120..3bedf48 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -3,7 +3,6 @@
       - check-requirements
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
-      - openstack-python3-train-jobs
+      - openstack-python3-ussuri-jobs
       - openstackclient-plugin-jobs
       - publish-openstack-docs-pti
diff --git a/releasenotes/notes/drop-py-2-7-7a92a5906980666b.yaml b/releasenotes/notes/drop-py-2-7-7a92a5906980666b.yaml
new file mode 100644
index 0000000..f4e6703
--- /dev/null
+++ b/releasenotes/notes/drop-py-2-7-7a92a5906980666b.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of python-karborclient
+    to support python 2.7 is OpenStack Train. The minimum version of Python now
+    supported is Python 3.6.
diff --git a/setup.cfg b/setup.cfg
index 2b74985..7c95316 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -13,8 +13,6 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: POSIX :: Linux
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
diff --git a/tox.ini b/tox.ini
index 655b78e..fc7abca 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,9 +1,11 @@
 [tox]
-minversion = 2.0
-envlist = py27,py37,pypy,pep8
+minversion = 3.1.1
+envlist = py37,pypy,pep8
 skipsdist = True
+ignore_basepython_conflict = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 install_command = pip install {opts} {packages}
 setenv =
@@ -19,28 +21,23 @@ commands =
   python setup.py test --slowest --testr-args='{posargs}'
 
 [testenv:pep8]
-basepython = python3
 commands = flake8
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:cover]
-basepython = python3
 commands =
   python setup.py test --coverage --testr-args='{posargs}'
   coverage report
 
 [testenv:docs]
-basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:debug]
-basepython = python3
 commands = oslo_debug_helper -t karborclient/tests {posargs}
 
 [flake8]
@@ -51,7 +48,6 @@ builtins = _
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt