diff --git a/test/vpnor/Makefile.am.include b/test/vpnor/Makefile.am.include
index 96f0421..0abb82c 100644
--- a/test/vpnor/Makefile.am.include
+++ b/test/vpnor/Makefile.am.include
@@ -315,6 +315,19 @@
 test_vpnor_create_write_window_rw_partition_LDFLAGS = $(OESDK_TESTCASE_FLAGS)
 test_vpnor_create_write_window_rw_partition_LDADD = $(VPNOR_LDADD)
 
+test_vpnor_create_write_window_unmapped_SOURCES = \
+	$(TEST_MBOX_VPNOR_SRCS) $(TEST_MOCK_SRCS) \
+	mboxd_msg.c \
+	mboxd_windows.c \
+	mboxd_lpc.c \
+	mboxd_lpc_virtual.cpp \
+	mboxd_pnor_partition_table.cpp \
+	mboxd_flash_virtual.cpp \
+	pnor_partition.cpp \
+	%reldir%/create_write_window_unmapped.cpp
+test_vpnor_create_write_window_unmapped_LDFLAGS = $(OESDK_TESTCASE_FLAGS)
+test_vpnor_create_write_window_unmapped_LDADD = $(VPNOR_LDADD)
+
 if VIRTUAL_PNOR_ENABLED
 check_PROGRAMS += \
 	%reldir%/create_pnor_partition_table \
@@ -343,7 +356,9 @@
 	%reldir%/create_read_window_size \
 	%reldir%/create_read_window_remap \
 	%reldir%/create_write_window_ro_partition \
-	%reldir%/create_write_window_rw_partition
+	%reldir%/create_write_window_rw_partition \
+	%reldir%/create_write_window_unmapped
 
 XFAIL_TESTS += %reldir%/create_write_window_ro_partition
+XFAIL_TESTS += %reldir%/create_write_window_unmapped
 endif
diff --git a/test/vpnor/create_write_window_unmapped.cpp b/test/vpnor/create_write_window_unmapped.cpp
new file mode 100644
index 0000000..b493fad
--- /dev/null
+++ b/test/vpnor/create_write_window_unmapped.cpp
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (C) 2018 IBM Corp.
+
+#include <assert.h>
+
+#include "config.h"
+#include "mboxd_pnor_partition_table.h"
+
+extern "C" {
+#include "test/mbox.h"
+#include "test/system.h"
+}
+
+#include "test/vpnor/tmpd.hpp"
+
+static constexpr auto BLOCK_SIZE = 0x1000;
+static constexpr auto ERASE_SIZE = BLOCK_SIZE;
+static constexpr auto N_WINDOWS = 1;
+static constexpr auto WINDOW_SIZE = BLOCK_SIZE;
+static constexpr auto MEM_SIZE = WINDOW_SIZE;
+static constexpr auto PNOR_SIZE = 3 * BLOCK_SIZE;
+
+const std::string toc[] = {
+    "partition01=HBB,00001000,00002000,80,ECC,READWRITE",
+};
+
+static const uint8_t get_info[] = {0x02, 0x00, 0x02, 0x00, 0x00, 0x00,
+                                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+                                   0x00, 0x00, 0x00, 0x00};
+
+// offset 0x100 and size 6
+static const uint8_t create_write_window[] = {
+    0x06, 0x01, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+static const uint8_t response[] = {0x06, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+                                   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07};
+
+namespace test = openpower::virtual_pnor::test;
+
+int main()
+{
+    struct mbox_context *ctx;
+
+    system_set_reserved_size(MEM_SIZE);
+    system_set_mtd_sizes(PNOR_SIZE, ERASE_SIZE);
+
+    ctx = mbox_create_test_context(N_WINDOWS, WINDOW_SIZE);
+
+    test::VpnorRoot root(ctx, toc, BLOCK_SIZE);
+
+    init_vpnor_from_paths(ctx);
+
+    int rc = mbox_command_dispatch(ctx, get_info, sizeof(get_info));
+    assert(rc == MBOX_R_SUCCESS);
+
+    rc = mbox_command_dispatch(ctx, create_write_window,
+                               sizeof(create_write_window));
+    assert(rc == MBOX_R_WINDOW_ERROR);
+
+    rc = mbox_cmp(ctx, response, sizeof(response));
+    assert(rc == 0);
+
+    return rc;
+}