fix test problem

Link: http://biosal.s3.amazonaws.com/quality-assurance-department/2014-07-29-03:01:01.log
Link: http://biosal.s3.amazonaws.com/quality-assurance-department/2014-07-29-03:01:01.tar.xz
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>