diff --git a/tests/Makefile b/tests/Makefile
index 55a4e15..3101b65 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -1,5 +1,5 @@
 all:
-	for i in 00 01 10; do \
+	for i in 00 01 10 11; do \
 		make -f run_mode.makefile MODE="$$i"; \
 	done
 
diff --git a/tests/mode11.cpp b/tests/mode11.cpp
new file mode 100644
index 0000000..07c6bfe
--- /dev/null
+++ b/tests/mode11.cpp
@@ -0,0 +1,3 @@
+#include "Vmode11.h"
+using TopModule = Vmode11;
+#include "write_read.cpp"
diff --git a/tests/mode11.v b/tests/mode11.v
new file mode 100644
index 0000000..3621681
--- /dev/null
+++ b/tests/mode11.v
@@ -0,0 +1,34 @@
+/* (c) Peter McGoron 2022
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v.2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+module mode11 (
+	input clk,
+	input [23:0] data_ctrl,
+	input activate,
+	input ss,
+	input rdy,
+	output master_finished
+);
+
+spi_write_read
+#(
+	.POLARITY(1),
+	.PHASE(1)
+) base (
+	.clk(clk),
+	.data_ctrl(data_ctrl),
+	.activate(activate),
+	.master_finished(master_finished),
+	.ss(ss),
+	.rdy(rdy)
+);
+
+initial begin
+	$dumpfile("mode11.vcd");
+	$dumpvars();
+end
+
+endmodule