diff --git a/tox.ini b/tox.ini
index 12f75610c..7ee13a113 100644
--- a/tox.ini
+++ b/tox.ini
@@ -163,3 +163,22 @@ deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
+
+[testenv:dev]
+# run locally (not in the gate) using editable mode
+# https://pip.pypa.io/en/stable/reference/pip_install/#editable-installs
+commands =
+    pip install -q -e "git+https://git.openstack.org/openstack/neutron#egg=neutron"
+
+[testenv:py3-dev]
+basepython = python3
+commands =
+    {[testenv:dev]commands}
+    {[testenv]commands}
+
+[testenv:pep8-dev]
+deps =
+    {[testenv]deps}
+commands =
+    {[testenv:dev]commands}
+    {[testenv:pep8]commands}