diff --git a/tox.ini b/tox.ini
index d8cf92ed69..43f090ba47 100644
--- a/tox.ini
+++ b/tox.ini
@@ -48,6 +48,7 @@ commands = flake8 gensim/
 
 
 [testenv:docs]
+basepython = python2
 recreate = True
 whitelist_externals = make
 deps = .[docs]