diff --git a/tools/testh5dump.sh b/tools/testh5dump.sh
index a59b10f44a..dd1c991c9f 100755
--- a/tools/testh5dump.sh
+++ b/tools/testh5dump.sh
@@ -42,7 +42,7 @@ DUMP()
 	echo "Expected output for '$h5dump $@'" 
 	echo "#############################"
 	cd $srcdir/testfiles
-        $full "$@" 2>/dev/null
+        $RUNSERIAL $full "$@" 2>/dev/null
     ) >$actual
     
     # Results. We normalize the result to account for different output