diff --git a/.zuul.yaml b/.zuul.yaml
index 1bd3a7b0..5d484e0f 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -3,8 +3,8 @@
       - publish-openstack-docs-pti
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
-      - openstack-python3-train-jobs
+      - openstack-python35-jobs
+      - openstack-python3-ussuri-jobs
       - openstack-pypy-jobs-nonvoting
       - release-notes-jobs-python3
     check:
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 1af3f20d..dee34e99 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,3 @@
-sphinx>=1.8.0,<2.0.0;python_version=='2.7' # BSD
-sphinx>=1.8.0,!=2.1.0;python_version>='3.4' # BSD
+sphinx>=1.8.0,!=2.1.0 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
diff --git a/releasenotes/notes/drop-py-2-7-c2bcdd28e4513532.yaml b/releasenotes/notes/drop-py-2-7-c2bcdd28e4513532.yaml
new file mode 100644
index 00000000..019b0395
--- /dev/null
+++ b/releasenotes/notes/drop-py-2-7-c2bcdd28e4513532.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Python 2.7 support has been dropped. Last release of hacking
+    to support py2.7 is OpenStack Train. The minimum version of Python now
+    supported by hacking is Python 3.5.
diff --git a/setup.cfg b/setup.cfg
index 4ed7b6b6..777bf683 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,6 +6,7 @@ summary = OpenStack Hacking Guideline Enforcement
 description-file =
     README.rst
 home-page = https://docs.openstack.org/hacking/latest/
+python-requires = >=3.5
 classifier =
     Development Status :: 4 - Beta
     Environment :: Console
@@ -15,9 +16,8 @@ classifier =
     License :: OSI Approved :: Apache Software License
     Operating System :: OS Independent
     Programming Language :: Python
-    Programming Language :: Python :: 2
-    Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
 
diff --git a/tox.ini b/tox.ini
index 7063b875..07ce77d9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,9 +1,11 @@
 [tox]
-minversion = 2.0
+minversion = 3.1.1
 skipsdist = True
-envlist = py27,py36,py37,pep8,pypy
+envlist = py36,py37,pep8,pypy
+ignore_basepython_conflict = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 install_command = pip install {opts} {packages}
 deps =
@@ -14,13 +16,11 @@ commands =
   stestr run --slowest {posargs}
 
 [testenv:integration]
-basepython = python3
 whitelist_externals = bash
 commands =
   bash integration-test/test.sh {posargs}
 
 [testenv:cover]
-basepython = python3
 setenv =
   PYTHON=coverage run --source hacking --parallel-mode
 commands =
@@ -30,7 +30,6 @@ commands =
   coverage xml -o cover/coverage.xml
 
 [testenv:docs]
-basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/doc/requirements.txt
@@ -38,18 +37,15 @@ commands =
   sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]
-basepython = python3
 deps =
   {[testenv:docs]deps}
 commands =
   sphinx-build -W -b html releasenotes/source releasenotes/build/html
 
 [testenv:venv]
-basepython = python3
 commands = {posargs}
 
 [testenv:pep8]
-basepython = python3
 commands = flake8 {posargs}
 
 [flake8]
@@ -61,7 +57,6 @@ enable-extensions = H106
 local-check = hacking.tests.test_local.check
 
 [testenv:lower-constraints]
-basepython = python3
 deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt