diff --git a/backends/lakeroad/tests/simple-mux.ys b/backends/lakeroad/tests/simple-mux.ys
index b10cff16a57..31bcb015d7b 100644
--- a/backends/lakeroad/tests/simple-mux.ys
+++ b/backends/lakeroad/tests/simple-mux.ys
@@ -18,3 +18,5 @@ proc; opt; memory; opt;
 techmap; opt;
 abc; opt;
 write_lakeroad
+# Writing the verilog first with "-noattr" doesn't cause infinite loop
+# write_verilog -noattr simple-mux.v