Note the tests are designed to be run from a global file system

testsuite/expect/README

 ############################################################################
 # Copyright (C) 2002-2007 The Regents of the University of California.
-# Copyright (C) 2008-2009 Lawrence Livermore National Security.
+# Copyright (C) 2008-2010 Lawrence Livermore National Security.
 # Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 # Written by Morris Jette <jette1@llnl.gov>
 # Additionals by Joseph Donaghy <donaghy1@llnl.gov>
@@ -48,6 +48,11 @@ catastrophic test failure other messages could be printed and their cause
 should be investigated. In either case, failing tests will terminate with a
 non-zero exit code and successful tests will terminate with a zero exit code.
 
+The test is designed to be executed from a cluster-wide file system.
+File created on one node in the cluster should be visible to all other
+nodes in the cluster. If not executed in such an environment, many tests
+will fail.
+
 The script "regression" will execute all of the tests and summarize the
 results. Standard output contains detailed logging of all events, which is
 quite verbose. Failure information is written to standard error. A good