diff --git a/sim/tinyriscv_soc_tb.v b/sim/tinyriscv_soc_tb.v
index 1a116d6..0ff93fe 100644
--- a/sim/tinyriscv_soc_tb.v
+++ b/sim/tinyriscv_soc_tb.v
@@ -74,7 +74,7 @@ module tinyriscv_soc_tb;
             $display("~~~~~~~~~~#       #    #     #    ######~~~~~~~~~~");
             $display("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
             $display("fail testnum = %2d", x3);
-            for (r = 0; r < 32; r++)
+            for (r = 0; r < 32; r = r + 1)
                 $display("x%2d = 0x%x", r, tinyriscv_soc_top_0.u_tinyriscv.u_regs.regs[r]);
         end
 `endif