diff --git a/tests/simple_abc9/run-test.sh b/tests/simple_abc9/run-test.sh
index 0d4262005..4d15a3253 100755
--- a/tests/simple_abc9/run-test.sh
+++ b/tests/simple_abc9/run-test.sh
@@ -25,5 +25,6 @@ exec ${MAKE:-make} -f ../tools/autotest.mk $seed *.v EXTRA_FLAGS="-n 300 -p '\
     synth -run coarse; \
     opt -full; \
     techmap; abc9 -lut 4 -box ../abc.box; \
+    clean; \
     check -assert; \
     select -assert-none t:${DOLLAR}_NOT_ t:${DOLLAR}_AND_ %%'"