diff --git a/tox.ini b/tox.ini
index c07dbbf..e575b4f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -98,7 +98,6 @@
 commands = python setup.py build_sphinx {posargs}
 
 [testenv:pep8]
-setenv = PYTHONHASHSEED=0
 commands =
    flake8 {posargs}
    {toxinidir}/tools/config/check_uptodate.sh