diff --git a/tox.ini b/tox.ini
index 6ec0b2c..492c4f6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,28 +6,23 @@
 [testenv]
 setenv = VIRTUAL_ENV={envdir}
          OS_TEST_PATH=./tempest/test_discover
-         PYTHONHASHSEED=0
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 
 [testenv:py26]
 setenv = OS_TEST_PATH=./tempest/tests
-         PYTHONHASHSEED=0
 commands = python setup.py test --slowest --testr-arg='tempest\.tests {posargs}'
 
 [testenv:py33]
 setenv = OS_TEST_PATH=./tempest/tests
-         PYTHONHASHSEED=0
 commands = python setup.py test --slowest --testr-arg='tempest\.tests {posargs}'
 
 [testenv:py27]
 setenv = OS_TEST_PATH=./tempest/tests
-         PYTHONHASHSEED=0
 commands = python setup.py test --slowest --testr-arg='tempest\.tests {posargs}'
 
 [testenv:cover]
 setenv = OS_TEST_PATH=./tempest/tests
-         PYTHONHASHSEED=0
 commands = python setup.py testr --coverage --testr-arg='tempest\.tests {posargs}'
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
@@ -96,6 +91,7 @@
        -r{toxinidir}/test-requirements.txt
 
 [testenv:pep8]
+setenv = PYTHONHASHSEED=0
 commands =
    flake8 {posargs}
    {toxinidir}/tools/config/check_uptodate.sh