diff --git a/hw/efinix_fpga/simulation/Makefile b/hw/efinix_fpga/simulation/Makefile
index 8fc9a76..a726e24 100644
--- a/hw/efinix_fpga/simulation/Makefile
+++ b/hw/efinix_fpga/simulation/Makefile
@@ -6,7 +6,7 @@ INC=$(shell find include/ -type f)
 
 TEST_PROGRAM_NAME=simple_mem_test
 
-TEST_PROGRAM=$(REPO_TOP)/sw/test_code/$(TEST_PROGRAM_NAME)/$(TEST_PROGRAM_NAME).hex
+TEST_PROGRAM?=$(REPO_TOP)/sw/test_code/$(TEST_PROGRAM_NAME)/$(TEST_PROGRAM_NAME).hex
 
 #TODO implement something like sources.list
 
diff --git a/hw/efinix_fpga/simulation/src/sim_top.sv b/hw/efinix_fpga/simulation/src/sim_top.sv
index da53126..80e611e 100644
--- a/hw/efinix_fpga/simulation/src/sim_top.sv
+++ b/hw/efinix_fpga/simulation/src/sim_top.sv
@@ -49,7 +49,7 @@ initial begin
 	button_reset <= '0;
 	repeat(10) @(r_clk_2);
 	button_reset <= '1;
-	repeat(2000) @(r_clk_2);
+	repeat(8000) @(r_clk_2);
 	$finish();
 end