diff --git a/tox.ini b/tox.ini
index 315ad0ac1..85f8fa20a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,6 +5,9 @@ envlist = pep8,py26,py27
 install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
+# Note the hash seed is set to 0 until barbican can be tested with a
+# random hash seed successfully.
+setenv = PYTHONHASHSEED=0
 
 commands =
     python setup.py testr --coverage