diff --git a/QA/tests/tce_ccsd_t_h2o/tce_ccsd_t_h2o.nw b/QA/tests/tce_ccsd_t_h2o/tce_ccsd_t_h2o.nw
index d552a2202a..1037302407 100644
--- a/QA/tests/tce_ccsd_t_h2o/tce_ccsd_t_h2o.nw
+++ b/QA/tests/tce_ccsd_t_h2o/tce_ccsd_t_h2o.nw
@@ -35,6 +35,7 @@ end
 tce
 ccsd(t)
 io ga
+tilesize 20
 end
 
 task tce energy