diff --git a/core/server/services/redirects/api.js b/core/server/services/redirects/api.js
index f4710e245b..0abe0b6e87 100644
--- a/core/server/services/redirects/api.js
+++ b/core/server/services/redirects/api.js
@@ -1,6 +1,5 @@
 const fs = require('fs-extra');
 const path = require('path');
-const moment = require('moment-timezone');
 const yaml = require('js-yaml');
 
 const logging = require('@tryghost/logging');
@@ -118,16 +117,6 @@ const parseRedirectsFile = (content, ext) => {
     throw new errors.IncorrectUsageError();
 };
 
-/**
- * @param {string} filePath
- * @returns {string}
- */
-const getBackupRedirectsFilePath = (filePath) => {
-    const {dir, name, ext} = path.parse(filePath);
-
-    return path.join(dir, `${name}-${moment().format('YYYY-MM-DD-HH-mm-ss')}${ext}`);
-};
-
 /**
  * @typedef {object} IRedirectManager
  */
@@ -137,17 +126,21 @@ class CustomRedirectsAPI {
      * @param {object} config
      * @param {string} config.basePath
      * @param {Function} config.validate - validates redirects configuration
+     * @param {Function} config.getBackupFilePath
      * @param {IRedirectManager} config.redirectManager
      */
-    constructor({basePath, validate, redirectManager}) {
+    constructor({basePath, validate, redirectManager, getBackupFilePath}) {
         /** @private */
         this.basePath = basePath;
 
         /** @private */
         this.redirectManager = redirectManager;
 
-        /**private */
+        /** @private */
         this.validate = validate;
+
+        /** @private */
+        this.getBackupFilePath = getBackupFilePath;
     }
 
     async init() {
diff --git a/core/server/services/redirects/index.js b/core/server/services/redirects/index.js
index 0307905351..18cf5c4b6b 100644
--- a/core/server/services/redirects/index.js
+++ b/core/server/services/redirects/index.js
@@ -4,6 +4,7 @@ const urlUtils = require('../../../shared/url-utils');
 const DynamicRedirectManager = require('@tryghost/express-dynamic-redirects');
 const CustomRedirectsAPI = require('./api');
 const validation = require('./validation');
+const {getBackupRedirectsFilePath} = require('./utils');
 
 let customRedirectsAPI;
 let redirectManager;
@@ -20,6 +21,7 @@ module.exports = {
         customRedirectsAPI = new CustomRedirectsAPI({
             basePath: config.getContentPath('data'),
             redirectManager,
+            getBackupFilePath: getBackupRedirectsFilePath,
             validate: validation.validate.bind(validation)
         });
 
diff --git a/core/server/services/redirects/utils.js b/core/server/services/redirects/utils.js
new file mode 100644
index 0000000000..bf75c0d874
--- /dev/null
+++ b/core/server/services/redirects/utils.js
@@ -0,0 +1,14 @@
+const path = require('path');
+const moment = require('moment-timezone');
+
+/**
+ * @param {string} filePath
+ * @returns {string}
+ */
+const getBackupRedirectsFilePath = (filePath) => {
+    const {dir, name, ext} = path.parse(filePath);
+
+    return path.join(dir, `${name}-${moment().format('YYYY-MM-DD-HH-mm-ss')}${ext}`);
+};
+
+module.exports.getBackupRedirectsFilePath = getBackupRedirectsFilePath;
diff --git a/test/unit/server/services/redirects/api.test.js b/test/unit/server/services/redirects/api.test.js
index 70dfa4ae09..69056a27f2 100644
--- a/test/unit/server/services/redirects/api.test.js
+++ b/test/unit/server/services/redirects/api.test.js
@@ -9,10 +9,11 @@ const CustomRedirectsAPI = require('../../../../../core/server/services/redirect
 
 describe('UNIT: redirects CustomRedirectsAPI class', function () {
     let customRedirectsAPI;
+    let redirectManager;
     const basePath = path.join(__dirname, '../../../../utils/fixtures/data/');
 
     before(function () {
-        const redirectManager = new DynamicRedirectManager({
+        redirectManager = new DynamicRedirectManager({
             permanentMaxAge: 100,
             getSubdirectoryURL: (pathname) => {
                 return `/ghost/${pathname}`;
@@ -20,8 +21,11 @@ describe('UNIT: redirects CustomRedirectsAPI class', function () {
         });
 
         customRedirectsAPI = new CustomRedirectsAPI({
-            basePath
-        }, redirectManager);
+            basePath,
+            redirectManager,
+            getBackupFilePath: () => path.join(basePath, 'backup.json'),
+            validate: () => {}
+        });
     });
 
     beforeEach(function () {
@@ -36,7 +40,7 @@ describe('UNIT: redirects CustomRedirectsAPI class', function () {
 
     describe('init', function () {
         it('initializes without errors when redirects file is not present', async function () {
-            const redirectManager = new DynamicRedirectManager({
+            redirectManager = new DynamicRedirectManager({
                 permanentMaxAge: 100,
                 getSubdirectoryURL: (pathname) => {
                     return `/ghost/${pathname}`;
@@ -44,8 +48,11 @@ describe('UNIT: redirects CustomRedirectsAPI class', function () {
             });
 
             customRedirectsAPI = new CustomRedirectsAPI({
-                basePath
-            }, redirectManager);
+                basePath,
+                redirectManager,
+                getBackupFilePath: {},
+                validate: () => {}
+            });
 
             await customRedirectsAPI.init();
             logging.error.called.should.be.false();