diff --git a/ts/reviewer/index.ts b/ts/reviewer/index.ts
index 581c9164c..0fa0a626a 100644
--- a/ts/reviewer/index.ts
+++ b/ts/reviewer/index.ts
@@ -39,7 +39,7 @@ function _runHook(arr: Array<Callback>): Promise<void[]> {
 
 let _updatingQueue: Promise<void> = Promise.resolve();
 
-function _queueAction(action: Callback): void {
+export function _queueAction(action: Callback): void {
     _updatingQueue = _updatingQueue.then(action);
 }