diff --git a/_template_iverilog/testbench.sv b/_template_iverilog/testbench.sv
index b91d2af..6f5aa3f 100644
--- a/_template_iverilog/testbench.sv
+++ b/_template_iverilog/testbench.sv
@@ -10,4 +10,11 @@ module testbench;
     initial begin
         $finish;
     end
+
+`ifdef DUMP
+    initial begin
+        $dumpfile("testbench.fst");
+        $dumpvars(0, testbench);
+    end
+`endif
 endmodule