diff --git a/verilog/dv/io_ports/io_ports_tb.v b/verilog/dv/io_ports/io_ports_tb.v
deleted file mode 100644
index f7628bc..0000000
--- a/verilog/dv/io_ports/io_ports_tb.v
+++ /dev/null
@@ -1,169 +0,0 @@
-// SPDX-FileCopyrightText: 2020 Efabless Corporation
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// SPDX-License-Identifier: Apache-2.0
-
-`default_nettype none
-
-`timescale 1 ns / 1 ps
-
-`include "uprj_netlists.v"
-`include "caravel_netlists.v"
-`include "spiflash.v"
-
-module io_ports_tb;
-	reg clock;
-	reg RSTB;
-	reg CSB;
-	reg power1, power2;
-	reg power3, power4;
-
-    	wire gpio;
-    	wire [37:0] mprj_io;
-	wire [7:0] mprj_io_0;
-
-	assign mprj_io_0 = mprj_io[7:0];
-	// assign mprj_io_0 = {mprj_io[8:4],mprj_io[2:0]};
-
-	assign mprj_io[3] = (CSB == 1'b1) ? 1'b1 : 1'bz;
-	// assign mprj_io[3] = 1'b1;
-
-	// External clock is used by default.  Make this artificially fast for the
-	// simulation.  Normally this would be a slow clock and the digital PLL
-	// would be the fast clock.
-
-	always #12.5 clock <= (clock === 1'b0);
-
-	initial begin
-		clock = 0;
-	end
-
-	initial begin
-		$dumpfile("io_ports.vcd");
-		$dumpvars(0, io_ports_tb);
-
-		// Repeat cycles of 1000 clock edges as needed to complete testbench
-		repeat (25) begin
-			repeat (1000) @(posedge clock);
-			// $display("+1000 cycles");
-		end
-		$display("%c[1;31m",27);
-		`ifdef GL
-			$display ("Monitor: Timeout, Test Mega-Project IO Ports (GL) Failed");
-		`else
-			$display ("Monitor: Timeout, Test Mega-Project IO Ports (RTL) Failed");
-		`endif
-		$display("%c[0m",27);
-		$finish;
-	end
-
-	initial begin
-	    // Observe Output pins [7:0]
-	    wait(mprj_io_0 == 8'h01);
-	    wait(mprj_io_0 == 8'h02);
-	    wait(mprj_io_0 == 8'h03);
-    	    wait(mprj_io_0 == 8'h04);
-	    wait(mprj_io_0 == 8'h05);
-            wait(mprj_io_0 == 8'h06);
-	    wait(mprj_io_0 == 8'h07);
-            wait(mprj_io_0 == 8'h08);
-	    wait(mprj_io_0 == 8'h09);
-            wait(mprj_io_0 == 8'h0A);   
-	    wait(mprj_io_0 == 8'hFF);
-	    wait(mprj_io_0 == 8'h00);
-		
-		`ifdef GL
-	    	$display("Monitor: Test 1 Mega-Project IO (GL) Passed");
-		`else
-		    $display("Monitor: Test 1 Mega-Project IO (RTL) Passed");
-		`endif
-	    $finish;
-	end
-
-	initial begin
-		RSTB <= 1'b0;
-		CSB  <= 1'b1;		// Force CSB high
-		#2000;
-		RSTB <= 1'b1;	    	// Release reset
-		#170000;
-		CSB = 1'b0;		// CSB can be released
-	end
-
-	initial begin		// Power-up sequence
-		power1 <= 1'b0;
-		power2 <= 1'b0;
-		power3 <= 1'b0;
-		power4 <= 1'b0;
-		#100;
-		power1 <= 1'b1;
-		#100;
-		power2 <= 1'b1;
-		#100;
-		power3 <= 1'b1;
-		#100;
-		power4 <= 1'b1;
-	end
-
-	always @(mprj_io) begin
-		#1 $display("MPRJ-IO state = %b ", mprj_io[7:0]);
-	end
-
-	wire flash_csb;
-	wire flash_clk;
-	wire flash_io0;
-	wire flash_io1;
-
-	wire VDD3V3 = power1;
-	wire VDD1V8 = power2;
-	wire USER_VDD3V3 = power3;
-	wire USER_VDD1V8 = power4;
-	wire VSS = 1'b0;
-
-	caravel uut (
-		.vddio	  (VDD3V3),
-		.vssio	  (VSS),
-		.vdda	  (VDD3V3),
-		.vssa	  (VSS),
-		.vccd	  (VDD1V8),
-		.vssd	  (VSS),
-		.vdda1    (USER_VDD3V3),
-		.vdda2    (USER_VDD3V3),
-		.vssa1	  (VSS),
-		.vssa2	  (VSS),
-		.vccd1	  (USER_VDD1V8),
-		.vccd2	  (USER_VDD1V8),
-		.vssd1	  (VSS),
-		.vssd2	  (VSS),
-		.clock	  (clock),
-		.gpio     (gpio),
-        	.mprj_io  (mprj_io),
-		.flash_csb(flash_csb),
-		.flash_clk(flash_clk),
-		.flash_io0(flash_io0),
-		.flash_io1(flash_io1),
-		.resetb	  (RSTB)
-	);
-
-	spiflash #(
-		.FILENAME("io_ports.hex")
-	) spiflash (
-		.csb(flash_csb),
-		.clk(flash_clk),
-		.io0(flash_io0),
-		.io1(flash_io1),
-		.io2(),			// not used
-		.io3()			// not used
-	);
-
-endmodule
-`default_nettype wire