diff -r abba08b9f8e0 -r c0daf79e5680 tests/run-tests.py
--- a/tests/run-tests.py	Tue Jan 15 13:33:28 2013 -0800
+++ b/tests/run-tests.py	Tue Jan 15 23:30:10 2013 +0100
@@ -1252,6 +1252,7 @@
     os.environ['no_proxy'] = ''
     os.environ['NO_PROXY'] = ''
     os.environ['TERM'] = 'xterm'
+    os.environ['PYTHONHASHSEED'] = 'random'
 
     # unset env related to hooks
     for k in os.environ.keys():