diff --git a/tests-py3.txt b/tests-py3.txt
new file mode 100644
index 000000000..ee01e038e
--- /dev/null
+++ b/tests-py3.txt
@@ -0,0 +1,21 @@
+# Blacklist of tests failing on Python 3
+designate.tests.test_agent.test_service
+designate.tests.test_api.test_v1.test_records
+designate.tests.test_api.test_v2.test_floatingips
+designate.tests.test_api.test_v2.test_recordsets
+designate.tests.test_api.test_v2.test_zones
+designate.tests.test_backend.test_nsd4
+designate.tests.test_central.test_service
+designate.tests.test_dnsutils
+designate.tests.test_mdns.test_handler
+designate.tests.test_notification_handler.test_neutron
+designate.tests.test_notification_handler.test_nova
+designate.tests.test_pool_manager.test_service
+designate.tests.test_storage.test_sqlalchemy
+designate.tests.test_utils
+designate.tests.unit.test_api.test_api_v2
+designate.tests.unit.test_backend.test_designate
+designate.tests.unit.test_central.test_basic
+designate.tests.unit.test_pool
+designate.tests.unit.test_zone_manager.test_tasks
+
diff --git a/tox.ini b/tox.ini
index f4f627920..0b429df64 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 1.6
-envlist = py27,flake8
+envlist = py34,py27,flake8
 skipsdist = True
 
 [testenv]
@@ -18,6 +18,10 @@ commands =
   sh tools/pretty_tox.sh '{posargs}'
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
+[testenv:py34]
+commands =
+  ostestr --blacklist_file=tests-py3.txt
+
 [testenv:docs]
 commands = python setup.py build_sphinx -E