diff --git a/tox.ini b/tox.ini
index b66363f2..e868f3f0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,7 +47,7 @@ commands =
   pep8
 
 [testenv:flake]
-basepython = python3
+basepython = python3.6
 deps =
     flake8
     -rrequirements.txt
@@ -67,7 +67,7 @@ commands =
   pylint --rcfile=./.pylintrc {posargs} polemarch
 
 [testenv:selenium]
-basepython = python3
+basepython = python3.6
 passenv = DJANGO_LOG_LEVEL
 changedir = ./
 commands =
@@ -85,7 +85,7 @@ deps =
     -rrequirements-test.txt
 
 [testenv:build]
-basepython = python3
+basepython = python3.6
 passenv = *
 changedir = .
 whitelist_externals =
@@ -96,7 +96,7 @@ commands =
     tox -c tox_build.ini --workdir {toxworkdir} -e py27-build,py27-wheel,py35-wheel,py36-wheel
 
 [testenv:builddoc]
-basepython = python3
+basepython = python3.6
 changedir = ./doc/
 whitelist_externals =
     cp
@@ -109,7 +109,7 @@ deps =
   -rrequirements-doc.txt
 
 [testenv:release]
-basepython = python3
+basepython = python3.6
 toxworkdir = ./
 passenv = *
 whitelist_externals =