diff --git a/tox.ini b/tox.ini
index c28c8c65..9b71f053 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,6 @@ install_command =
 setenv = VIRTUAL_ENV={envdir}
          OS_STDOUT_NOCAPTURE=False
          OS_STDERR_NOCAPTURE=False
-         PYTHONHASHSEED=0
 
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt