Update i2c_master_tb.v

does this work?

tb/i2c_master_tb.v

@@ -10,7 +10,7 @@ module i2c_master_tb;
   // Parameters
 
   parameter CLK_PERIOD = 10;  // 10ns clock period (100MHz clock)
-  parameter ENABLE_DEVICE_3 = 0;  // Set to 0 to disable device 3
+  parameter ENABLE_DEVICE_3 = 1;  // Set to 0 to disable device 3
   parameter ENABLE_DEVICE_4 = 1;  // Set to 0 to disable device 4
 
   reg clk = 0;