diff --git a/t/Trilinos/Trilinos-12.10.1-intel-2017a-Python-2.7.11-test.eb b/t/Trilinos/Trilinos-12.10.1-intel-2017a-Python-2.7.11-test.eb
index 592c8e42..11ee530a 100644
--- a/t/Trilinos/Trilinos-12.10.1-intel-2017a-Python-2.7.11-test.eb
+++ b/t/Trilinos/Trilinos-12.10.1-intel-2017a-Python-2.7.11-test.eb
@@ -38,6 +38,6 @@ dependencies = [
 prebuildopts = 'for NAME in `find -name link.txt`; do cp $NAME $NAME.old; sed -e "s/libcholmod.a/libcholmod.a -lmetis -lcamd -lccolamd/g" $NAME.old | tee $NAME; done &&'
 
 # too parallel is too slow, and may cause build/tests to fail
-maxparallel = 24
+maxparallel = 16
 
 moduleclass = 'numlib'