diff --git a/tox.ini b/tox.ini
index 3c368ecdd3..502ddc99f8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -71,6 +71,8 @@ commands =
 commands = oslo_debug_helper -t ironic/tests/unit {posargs}
 
 [testenv:docs]
+# FIXME(dtantsur): workaround for bug #1714025
+basepython = python2
 setenv = PYTHONHASHSEED=0
 sitepackages = False
 envdir = {toxworkdir}/venv