diff --git a/tox.ini b/tox.ini
index df26b41399..389f5084f3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,14 +4,17 @@ minversion = 1.6
 skipsdist = True
 
 [testenv]
+# Note the hash seed is set to 0 until trove unit tests can run with
+# a random hash seed successfully.
 setenv = VIRTUAL_ENV={envdir}
+         PYTHONHASHSEED=0
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
        setuptools_git>=0.4
 commands = {envpython} run_tests.py
-	    python setup.py testr --slowest
+            python setup.py testr --slowest
 
 [tox:jenkins]
 sitepackages = True
@@ -55,4 +58,3 @@ commands = openstack-doc-test --check-build {posargs}
 
 [testenv:publishdocs]
 commands = openstack-doc-test --check-build --publish --force
-