diff --git a/Labs/15. Programming device/lab_15.tb_system.sv b/Labs/15. Programming device/lab_15.tb_system.sv
index 24e9679..c95e24e 100644
--- a/Labs/15. Programming device/lab_15.tb_system.sv	
+++ b/Labs/15. Programming device/lab_15.tb_system.sv	
@@ -101,7 +101,7 @@ module lab_15_tb_system();
   end
 
 
-  system dut(
+  system DUT(
     .clk_i    (clk_i  ),
     .resetn_i (!rst_i ),
     .rx_i     (flashing_is_done ? tb_rx : flash_rx ),
@@ -111,7 +111,7 @@ module lab_15_tb_system();
     .sw_i     (sw_i   )
   );
 
-  assign core_reset = dut.core_inst.rst_i;
+  assign core_reset = DUT.core_inst.rst_i;
 
   uart_rx rx(
   .clk_i      (sysclk     ),