diff --git a/setup.cfg b/setup.cfg
index fc174ac..3d6806e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,7 +17,7 @@ classifier =
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.3
-    Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
 
 [files]
 packages =
@@ -48,4 +48,4 @@ output_file = python_nemesis/locale/python_nemesis.pot
 [build_releasenotes]
 all_files = 1
 build-dir = releasenotes/build
-source-dir = releasenotes/source
\ No newline at end of file
+source-dir = releasenotes/source
diff --git a/tox.ini b/tox.ini
index 7b2a2df..94c62af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py34,py27,pep8
+envlist = py35,py27,pep8
 skipsdist = True
 
 [testenv]
@@ -18,6 +18,14 @@ commands = flake8 {posargs}
 [testenv:venv]
 commands = {posargs}
 
+[testenv:debug-py27]
+basepython = python2.7
+commands = oslo_debug_helper {posargs}
+
+[testenv:debug-py35]
+basepython = python3.5
+commands = oslo_debug_helper {posargs}
+
 [flake8]
 # E123, E125 skipped as they are invalid PEP-8.
 show-source = True