diff --git a/tests/tools/autotest.sh b/tests/tools/autotest.sh
index 65fd4cb1f..34007b689 100755
--- a/tests/tools/autotest.sh
+++ b/tests/tools/autotest.sh
@@ -180,6 +180,7 @@ do
 		else
 			test_passes -f "$frontend $include_opts" -p "hierarchy; proc; opt; memory; opt; fsm; opt -full -fine" ${bn}_ref.v
 			test_passes -f "$frontend $include_opts" -p "hierarchy; synth -run coarse; techmap; opt; abc -dff" ${bn}_ref.v
+			test_passes -f "$frontend $include_opts" -p "hierarchy; synth -run coarse; techmap; opt; abc -lut 4" ${bn}_ref.v
 			if [ -n "$firrtl2verilog" ]; then
 			    if test -z "$xfirrtl" || ! grep "$fn" "$xfirrtl" ; then
 				"$toolsdir"/../../yosys -b "firrtl" -o ${bn}_ref.fir -f "$frontend $include_opts" -p "prep -nordff; proc; opt; memory; opt; fsm; opt -full -fine; pmuxtree" ${bn}_ref.v