diff --git a/src/blockstore/blockstore.h b/src/blockstore/blockstore.h
index 950fdaa9..80bfa2d4 100644
--- a/src/blockstore/blockstore.h
+++ b/src/blockstore/blockstore.h
@@ -42,8 +42,7 @@
 #define BS_OP_DELETE 6
 #define BS_OP_LIST 7
 #define BS_OP_ROLLBACK 8
-#define BS_OP_SYNC_STAB_ALL 9
-#define BS_OP_MAX 9
+#define BS_OP_MAX 8
 
 #define BS_OP_PRIVATE_DATA_SIZE 256
 
@@ -113,14 +112,6 @@ Input:
 Output:
 - retval = 0 or negative error number (-ENOENT if no such version for stabilize)
 
-## BS_OP_SYNC_STAB_ALL
-
-ONLY FOR TESTS! Sync and mark all unstable object versions as stable, at once.
-
-Input: Nothing except opcode
-Output:
-- retval = 0 or negative error number (-EINVAL)
-
 ## BS_OP_LIST
 
 Get a list of all objects in this Blockstore.
diff --git a/src/blockstore/blockstore_impl.cpp b/src/blockstore/blockstore_impl.cpp
index 1344ac5f..8222adef 100644
--- a/src/blockstore/blockstore_impl.cpp
+++ b/src/blockstore/blockstore_impl.cpp
@@ -343,44 +343,6 @@ void blockstore_impl_t::enqueue_op(blockstore_op_t *op)
         ringloop->set_immediate([op]() { std::function<void (blockstore_op_t*)>(op->callback)(op); });
         return;
     }
-    if (op->opcode == BS_OP_SYNC_STAB_ALL)
-    {
-        std::function<void(blockstore_op_t*)> *old_callback = new std::function<void(blockstore_op_t*)>(op->callback);
-        op->opcode = BS_OP_SYNC;
-        op->callback = [this, old_callback](blockstore_op_t *op)
-        {
-            if (op->retval >= 0 && unstable_writes.size() > 0)
-            {
-                op->opcode = BS_OP_STABLE;
-                op->len = unstable_writes.size();
-                obj_ver_id *vers = new obj_ver_id[op->len];
-                op->buf = vers;
-                int i = 0;
-                for (auto it = unstable_writes.begin(); it != unstable_writes.end(); it++, i++)
-                {
-                    vers[i] = {
-                        .oid = it->first,
-                        .version = it->second,
-                    };
-                }
-                unstable_writes.clear();
-                op->callback = [old_callback](blockstore_op_t *op)
-                {
-                    obj_ver_id *vers = (obj_ver_id*)op->buf;
-                    delete[] vers;
-                    op->buf = NULL;
-                    (*old_callback)(op);
-                    delete old_callback;
-                };
-                this->enqueue_op(op);
-            }
-            else
-            {
-                (*old_callback)(op);
-                delete old_callback;
-            }
-        };
-    }
     if ((op->opcode == BS_OP_WRITE || op->opcode == BS_OP_WRITE_STABLE || op->opcode == BS_OP_DELETE) && !enqueue_write(op))
     {
         ringloop->set_immediate([op]() { std::function<void (blockstore_op_t*)>(op->callback)(op); });
diff --git a/src/blockstore/fio_engine.cpp b/src/blockstore/fio_engine.cpp
index 6304abf2..e3eb3952 100644
--- a/src/blockstore/fio_engine.cpp
+++ b/src/blockstore/fio_engine.cpp
@@ -225,7 +225,7 @@ static enum fio_q_status bs_queue(struct thread_data *td, struct io_u *io)
         bsd->last_sync = false;
         break;
     case DDIR_SYNC:
-        op->opcode = BS_OP_SYNC_STAB_ALL;
+        op->opcode = BS_OP_SYNC;
         op->callback = [io, n = bsd->op_n](blockstore_op_t *op)
         {
             bs_data *bsd = (bs_data*)io->engine_data;