diff --git a/tox.ini b/tox.ini
index 0e100186b..be88aabff 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,6 +25,7 @@ commands =
   python setup.py testr --coverage {posargs:ironic_python_agent}
 
 [testenv:venv]
+setenv = PYTHONHASHSEED=0
 commands = {posargs:}
 
 [testenv:devenv]