diff --git a/tox.ini b/tox.ini
index 3857d8285..55171fb49 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,9 +20,11 @@ commands =
   stestr slowest
 
 [testenv:releasenotes]
+basepython = python3
 commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
 [testenv:pep8]
+basepython = python3
 commands =
   flake8
   # pylint --rcfile=.pylintrc --output-format=colorized {posargs:neutron_lbaas}
@@ -31,6 +33,7 @@ commands =
 whitelist_externals = sh
 
 [testenv:cover]
+basepython = python3
 setenv =
   {[testenv]setenv}
   PYTHON=coverage run --source neutron_lbaas --parallel-mode
@@ -40,9 +43,11 @@ commands =
   coverage report
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:docs]
+basepython = python3
 commands = python setup.py build_sphinx
 
 [flake8]
@@ -77,6 +82,7 @@ deps =
   -r{toxinidir}/neutron_lbaas/tests/functional/requirements.txt
 
 [testenv:dsvm-functional]
+basepython = python3
 setenv = {[testenv]setenv}
          {[testenv:functional]setenv}
          OS_SUDO_TESTING=1
@@ -91,6 +97,7 @@ commands =
 # If you are running the tests locally you should set the env variable
 # TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
 [testenv:apiv2]
+basepython = python3
 passenv = TEMPEST_CONFIG_DIR
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v2/api
@@ -101,6 +108,7 @@ commands =
 # If you are running the tests locally you should set the env variable
 # TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
 [testenv:scenario]
+basepython = python3
 passenv = TEMPEST_CONFIG_DIR
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v2/scenario
@@ -111,6 +119,7 @@ commands =
 # If you are running the tests locally you should set the env variable
 # TEMPEST_CONFIG_DIR=/opt/stack/tempest/etc
 [testenv:ddt]
+basepython = python3
 passenv = TEMPEST_CONFIG_DIR
 setenv =
  OS_TEST_PATH={toxinidir}/neutron_lbaas/tests/tempest/v2/ddt
@@ -119,6 +128,7 @@ commands =
   stestr slowest
 
 [testenv:genconfig]
+basepython = python3
 commands = {toxinidir}/tools/generate_config_file_samples.sh
 
 [testenv:lower-constraints]