diff --git a/test/Makefile.am.include b/test/Makefile.am.include
index 195e451..2b7ba75 100644
--- a/test/Makefile.am.include
+++ b/test/Makefile.am.include
@@ -2,20 +2,23 @@
 
 test_flash_copy_SOURCES = \
 	%reldir%/flash_copy.c \
-	flash.c \
+	mtd/backend.c \
+	lpc.c \
 	common.c mtd.c \
 	%reldir%/tmpf.c \
 	%reldir%/system.c
 
 test_flash_erase_SOURCES = \
 	%reldir%/flash_erase.c \
-	flash.c \
+	mtd/backend.c \
+	lpc.c \
 	common.c \
 	%reldir%/tmpf.c
 
 test_flash_write_SOURCES = \
 	%reldir%/flash_write.c \
-	flash.c \
+	mtd/backend.c \
+	lpc.c \
 	common.c \
 	%reldir%/tmpf.c
 
@@ -23,12 +26,16 @@
 	transport_mbox.c \
 	windows.c \
 	lpc.c \
-	lpc_reset.c \
 	common.c \
-	flash.c \
 	protocol.c
 
-TEST_MOCK_SRCS = %reldir%/tmpf.c %reldir%/mbox.c %reldir%/system.c
+TEST_MOCK_CORE = \
+	%reldir%/tmpf.c \
+	mtd/backend.c \
+	%reldir%/mbox.c \
+	%reldir%/system.c
+
+TEST_MOCK_SRCS = %reldir%/backend.c $(TEST_MOCK_CORE)
 
 test_get_mbox_info_v2_SOURCES = %reldir%/get_mbox_info_v2.c \
 				$(TEST_MBOX_SRCS) $(TEST_MOCK_SRCS)
diff --git a/test/backend.c b/test/backend.c
new file mode 100644
index 0000000..7b9fec8
--- /dev/null
+++ b/test/backend.c
@@ -0,0 +1,11 @@
+#include "backend.h"
+#include "mboxd.h"
+
+#include <errno.h>
+
+struct backend backend_get_vpnor(void)
+{
+	struct backend be = {0};
+
+	return be;
+}
diff --git a/test/flash_copy.c b/test/flash_copy.c
index 3b88b76..472315b 100644
--- a/test/flash_copy.c
+++ b/test/flash_copy.c
@@ -11,7 +11,7 @@
 
 #include "common.h"
 #include "mboxd.h"
-#include "flash.h"
+#include "backend.h"
 
 #include "test/system.h"
 #include "test/tmpf.h"
@@ -69,12 +69,15 @@
 		goto free;
 	}
 
-	context.fds[MTD_FD].fd = tmp.fd;
+	assert(!backend_probe_mtd(&context.backend, tmp.path));
 
 	flash_copy(&context, 0, dst, TEST_SIZE);
 	assert(0 == memcmp(src, dst, TEST_SIZE));
 
+	backend_free(&context.backend);
+
 free:
+
 	free(src);
 	free(dst);
 
diff --git a/test/flash_erase.c b/test/flash_erase.c
index 3d299dd..ad4e535 100644
--- a/test/flash_erase.c
+++ b/test/flash_erase.c
@@ -13,7 +13,7 @@
 
 #include "common.h"
 #include "mboxd.h"
-#include "flash.h"
+#include "backend.h"
 
 #include "test/tmpf.h"
 
@@ -32,7 +32,7 @@
 	if (rc < 0)
 		return NULL;
 
-	return strdup(mtd.path);
+	return mtd.path;
 }
 
 struct erase_info_user *recorded;
@@ -98,10 +98,13 @@
 
 int main(void)
 {
-	struct mbox_context context;
+	struct mbox_context context = {0};
+	struct backend *backend;
 	char data[MEM_SIZE];
 	int rc;
 
+	backend = &context.backend;
+
 	rc = atexit(cleanup_mtd);
 	if (rc)
 		return rc;
@@ -111,7 +114,7 @@
 	n_ioctls = 0;
 	recorded = NULL;
 
-	flash_dev_init(&context);
+	assert(!backend_probe_mtd(backend, get_dev_mtd()));
 
 	/* Erase from an unknown state */
 	rc = flash_erase(&context, 0, sizeof(data));
@@ -206,7 +209,7 @@
 	recorded = NULL;
 	n_ioctls = 0;
 
-	flash_dev_free(&context);
+	backend_free(backend);
 
 	return rc;
 }
diff --git a/test/flash_write.c b/test/flash_write.c
index 1b55dbe..168b2aa 100644
--- a/test/flash_write.c
+++ b/test/flash_write.c
@@ -12,7 +12,7 @@
 
 #include "common.h"
 #include "mboxd.h"
-#include "flash.h"
+#include "backend.h"
 
 #include "test/tmpf.h"
 
@@ -31,7 +31,7 @@
 	if (rc < 0)
 		return NULL;
 
-	return strdup(tmp->path);
+	return tmp->path;
 }
 
 #define MEM_SIZE 3
@@ -58,6 +58,7 @@
 int main(void)
 {
 	struct mbox_context _context, *context = &_context;
+	struct backend *backend = &context->backend;
 	char src[MEM_SIZE];
 	uint8_t *map;
 	int rc;
@@ -66,7 +67,7 @@
 
 	mbox_vlog = &mbox_log_console;
 
-	rc = flash_dev_init(context);
+	rc = backend_probe_mtd(backend, get_dev_mtd());
 	assert(rc == 0);
 
 	map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE, tmp->fd, 0);
@@ -102,7 +103,7 @@
 	rc = memcmp(src, map, sizeof(src));
 	assert(rc == 0);
 
-	flash_dev_free(context);
+	backend_free(backend);
 
 	return rc;
 }
diff --git a/test/implicit_flush.c b/test/implicit_flush.c
index 74275e4..f186d19 100644
--- a/test/implicit_flush.c
+++ b/test/implicit_flush.c
@@ -5,6 +5,7 @@
 #include <sys/mman.h>
 
 #include "mboxd.h"
+#include "mtd/backend.h"
 #include "transport_mbox.h"
 
 #include "test/mbox.h"
@@ -92,7 +93,7 @@
 	assert(rc == 0);
 
 	map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE,
-			ctx->fds[MTD_FD].fd, 0);
+			((struct mtd_data *)ctx->backend.priv)->fd, 0);
 	assert(map != MAP_FAILED);
 
 	rc = memcmp(finish_data, map, sizeof(finish_data));
@@ -124,7 +125,7 @@
 	assert(rc == 0);
 
 	map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE,
-			ctx->fds[MTD_FD].fd, 0);
+			((struct mtd_data *)ctx->backend.priv)->fd, 0);
 	assert(map != MAP_FAILED);
 
 	rc = memcmp(finish_data, map, sizeof(finish_data));
diff --git a/test/mark_write_erased_v2.c b/test/mark_write_erased_v2.c
index 9c0f172..95cff4b 100644
--- a/test/mark_write_erased_v2.c
+++ b/test/mark_write_erased_v2.c
@@ -5,6 +5,7 @@
 #include <sys/mman.h>
 
 #include "mboxd.h"
+#include "mtd/backend.h"
 #include "transport_mbox.h"
 
 #include "test/mbox.h"
@@ -74,7 +75,7 @@
 	assert(rc == 0);
 
 	map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE,
-			ctx->fds[MTD_FD].fd, 0);
+			((struct mtd_data *)ctx->backend.priv)->fd, 0);
 	assert(map != MAP_FAILED);
 
 	rc = memcmp(start_data, map, sizeof(start_data));
diff --git a/test/mbox.c b/test/mbox.c
index a351250..55af00c 100644
--- a/test/mbox.c
+++ b/test/mbox.c
@@ -8,13 +8,15 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include "config.h"
 #include "mboxd.h"
-#include "flash.h"
+#include "backend.h"
 #include "lpc.h"
 #include "transport_mbox.h"
 #include "windows.h"
@@ -212,8 +214,9 @@
 int __transport_mbox_init(struct mbox_context *context, const char *path);
 int __lpc_dev_init(struct mbox_context *context, const char *path);
 
-struct mbox_context *mbox_create_test_context(int n_windows, size_t len)
+struct mbox_context *mbox_create_frontend_context(int n_windows, size_t len)
 {
+	struct mtd_info_user mtd_info;
 	int rc;
 
 	mbox_vlog = &mbox_log_console;
@@ -224,9 +227,6 @@
 	rc = tmpf_init(&test.mbox, "mbox-store.XXXXXX");
 	assert(rc == 0);
 
-	rc = tmpf_init(&test.flash, "flash-store.XXXXXX");
-	assert(rc == 0);
-
 	rc = tmpf_init(&test.lpc, "lpc-store.XXXXXX");
 	assert(rc == 0);
 
@@ -247,12 +247,18 @@
 	assert(rc == 0);
 	test.context.fds[MBOX_FD].fd = test.mbox.fd;
 
-	rc = flash_dev_init(&test.context);
+	/* Instantiate the mtd backend */
+	rc = tmpf_init(&test.flash, "flash-store.XXXXXX");
 	assert(rc == 0);
 
-	rc = fallocate(test.flash.fd, 0, 0, test.context.mtd_info.size);
+	rc = ioctl(test.flash.fd, MEMGETINFO, &mtd_info);
 	assert(rc == 0);
 
+	rc = fallocate(test.flash.fd, 0, 0, mtd_info.size);
+	assert(rc == 0);
+
+	test.context.backend.flash_size = mtd_info.size;
+
 	rc = __lpc_dev_init(&test.context, test.lpc.path);
 	assert(rc == 0);
 
@@ -265,6 +271,20 @@
 	return rc ? NULL : &test.context;
 }
 
+struct mbox_context *mbox_create_test_context(int n_windows, size_t len)
+{
+	struct mbox_context *ctx;
+	int rc;
+
+	ctx = mbox_create_frontend_context(n_windows, len);
+	assert(ctx);
+
+	rc = backend_probe_mtd(&ctx->backend, test.flash.path);
+	assert(rc == 0);
+
+	return ctx;
+}
+
 /* From ccan's container_of module, CC0 license */
 #define container_of(member_ptr, containing_type, member)		\
 	 ((containing_type *)						\
@@ -295,13 +315,13 @@
 	/* Sanity check */
 	arg = container_of(context, struct mbox_test_context, context);
 	assert(&test == arg);
-	assert(len <= test.context.flash_size);
+	assert(len <= test.context.backend.flash_size);
 
-	map = mmap(NULL, test.context.mtd_info.size, PROT_WRITE, MAP_SHARED,
-			test.flash.fd, 0);
+	map = mmap(NULL, test.context.backend.flash_size,
+		   PROT_WRITE, MAP_SHARED, test.flash.fd, 0);
 	assert(map != MAP_FAILED);
 	memcpy(map, data, len);
-	munmap(map, test.context.mtd_info.size);
+	munmap(map, test.context.backend.flash_size);
 
 	return 0;
 }
diff --git a/test/mbox.h b/test/mbox.h
index 8c1bff9..a030b7d 100644
--- a/test/mbox.h
+++ b/test/mbox.h
@@ -14,6 +14,7 @@
 #include "tmpf.h"
 
 struct mbox_context *mbox_create_test_context(int n_windows, size_t len);
+struct mbox_context *mbox_create_frontend_context(int n_windows, size_t len);
 
 int mbox_set_mtd_data(struct mbox_context *context, const void *data,
 		size_t len);
diff --git a/test/write_flush_v2.c b/test/write_flush_v2.c
index fafa7d0..b53550d 100644
--- a/test/write_flush_v2.c
+++ b/test/write_flush_v2.c
@@ -5,6 +5,7 @@
 #include <sys/mman.h>
 
 #include "mboxd.h"
+#include "mtd/backend.h"
 #include "transport_mbox.h"
 
 #include "test/mbox.h"
@@ -95,7 +96,7 @@
 	assert(rc == 0);
 
 	map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE,
-			ctx->fds[MTD_FD].fd, 0);
+			((struct mtd_data *)ctx->backend.priv)->fd, 0);
 	assert(map != MAP_FAILED);
 
 	rc = memcmp(flush_middle_data, map, sizeof(flush_middle_data));
diff --git a/test/write_window_dirty_erase.c b/test/write_window_dirty_erase.c
index e839890..15f0bc3 100644
--- a/test/write_window_dirty_erase.c
+++ b/test/write_window_dirty_erase.c
@@ -5,6 +5,7 @@
 #include <sys/mman.h>
 
 #include "mboxd.h"
+#include "mtd/backend.h"
 #include "transport_mbox.h"
 
 #include "test/mbox.h"
@@ -114,7 +115,7 @@
 	assert(rc == 0);
 
 	map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE,
-			ctx->fds[MTD_FD].fd, 0);
+			((struct mtd_data *)ctx->backend.priv)->fd, 0);
 	assert(map != MAP_FAILED);
 
 	rc = memcmp(flush_dirty_erased_dirty_data, map,