diff --git a/test/copy_flash.c b/test/copy_flash.c
index 14ce854..5c40b53 100644
--- a/test/copy_flash.c
+++ b/test/copy_flash.c
@@ -51,6 +51,8 @@
 
 	atexit(cleanup);
 
+	mbox_vlog = &mbox_log_console;
+
 	src = malloc(TEST_SIZE);
 	dst = malloc(TEST_SIZE);
 	if (!(src && dst)) {
diff --git a/test/erase_flash.c b/test/erase_flash.c
index 23a536f..71e87b5 100644
--- a/test/erase_flash.c
+++ b/test/erase_flash.c
@@ -120,6 +120,8 @@
 	if (rc)
 		return rc;
 
+	mbox_vlog = &mbox_log_console;
+
 	n_ioctls = 0;
 	recorded = NULL;
 
diff --git a/test/write_flash.c b/test/write_flash.c
index 382a4a2..ebd0fb7 100644
--- a/test/write_flash.c
+++ b/test/write_flash.c
@@ -77,6 +77,8 @@
 
 	atexit(cleanup);
 
+	mbox_vlog = &mbox_log_console;
+
 	rc = init_flash_dev(context);
 	assert(rc == 0);