diff --git a/test/unit/lib/bdev/vbdev_lvol.c/vbdev_lvol_ut.c b/test/unit/lib/bdev/vbdev_lvol.c/vbdev_lvol_ut.c
index 2ee82b4791..d6a85b44f6 100644
--- a/test/unit/lib/bdev/vbdev_lvol.c/vbdev_lvol_ut.c
+++ b/test/unit/lib/bdev/vbdev_lvol.c/vbdev_lvol_ut.c
@@ -36,6 +36,8 @@
 
 #include "bdev/lvol/vbdev_lvol.c"
 
+#include "unit/lib/json_mock.c"
+
 #define SPDK_BS_PAGE_SIZE 0x1000
 
 int g_lvolerrno;
@@ -541,48 +543,6 @@ spdk_bdev_module_list_add(struct spdk_bdev_module *bdev_module)
 {
 }
 
-int
-spdk_json_write_name(struct spdk_json_write_ctx *w, const char *name)
-{
-	return 0;
-}
-
-int
-spdk_json_write_array_begin(struct spdk_json_write_ctx *w)
-{
-	return 0;
-}
-
-int
-spdk_json_write_array_end(struct spdk_json_write_ctx *w)
-{
-	return 0;
-}
-
-int
-spdk_json_write_string(struct spdk_json_write_ctx *w, const char *val)
-{
-	return 0;
-}
-
-int
-spdk_json_write_bool(struct spdk_json_write_ctx *w, bool val)
-{
-	return 0;
-}
-
-int
-spdk_json_write_object_begin(struct spdk_json_write_ctx *w)
-{
-	return 0;
-}
-
-int
-spdk_json_write_object_end(struct spdk_json_write_ctx *w)
-{
-	return 0;
-}
-
 const char *
 spdk_bdev_get_name(const struct spdk_bdev *bdev)
 {