diff --git a/services/document-updater/test/acceptance/js/helpers/MockProjectHistoryApi.js b/services/document-updater/test/acceptance/js/helpers/MockProjectHistoryApi.js
index f588d5c4ec..21237fdf94 100644
--- a/services/document-updater/test/acceptance/js/helpers/MockProjectHistoryApi.js
+++ b/services/document-updater/test/acceptance/js/helpers/MockProjectHistoryApi.js
@@ -1,33 +1,23 @@
-// TODO: This file was created by bulk-decaffeinate.
-// Fix any style issues and re-enable lint.
-/*
- * decaffeinate suggestions:
- * DS102: Remove unnecessary code created because of implicit returns
- * DS207: Consider shorter variations of null checks
- * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
- */
 let MockProjectHistoryApi
+const { expressify } = require('@overleaf/promise-utils')
 const express = require('express')
 const app = express()
 
 module.exports = MockProjectHistoryApi = {
-  flushProject(docId, callback) {
-    if (callback == null) {
-      callback = function () {}
-    }
-    return callback()
-  },
+  async flushProject(docId) {},
 
   run() {
-    app.post('/project/:project_id/flush', (req, res, next) => {
-      return this.flushProject(req.params.project_id, error => {
-        if (error != null) {
-          return res.sendStatus(500)
-        } else {
+    app.post(
+      '/project/:project_id/flush',
+      expressify(async (req, res, next) => {
+        try {
+          await this.flushProject(req.params.project_id)
           return res.sendStatus(204)
+        } catch (error) {
+          return res.sendStatus(500)
         }
       })
-    })
+    )
 
     return app.listen(3054, error => {
       if (error != null) {