diff --git a/ghost/members-importer/lib/importer.js b/ghost/members-importer/lib/importer.js
index d460f95ed9..83180ad963 100644
--- a/ghost/members-importer/lib/importer.js
+++ b/ghost/members-importer/lib/importer.js
@@ -2,6 +2,8 @@ const moment = require('moment-timezone');
 const path = require('path');
 const fs = require('fs-extra');
 const membersCSV = require('@tryghost/members-csv');
+const errors = require('@tryghost/errors');
+const tpl = require('@tryghost/tpl');
 const GhostMailer = require('../../mail').GhostMailer;
 const urlUtils = require('../../../../shared/url-utils');
 const db = require('../../../data/db');
@@ -9,6 +11,11 @@ const emailTemplate = require('./email-template');
 const jobsService = require('../../jobs');
 const labsService = require('../../../../shared/labs');
 
+const messages = {
+    filenameCollision: 'Filename already exists, please try again.',
+    jobAlreadyComplete: 'Job is already complete.'
+};
+
 const ghostMailer = new GhostMailer();
 module.exports = class MembersCSVImporter {
     /**
@@ -71,7 +78,7 @@ module.exports = class MembersCSVImporter {
         const pathExists = await fs.pathExists(outputFilePath);
 
         if (pathExists) {
-            throw new Error('Maybe we need better name generation');
+            throw new errors.DataImportError(tpl(messages.filenameCollision));
         }
 
         const rows = await membersCSV.parse(inputFilePath, headerMapping, defaultLabels);
@@ -102,7 +109,7 @@ module.exports = class MembersCSVImporter {
         const job = await this.getJob(id);
 
         if (job.status === 'complete') {
-            throw new Error('Job is already complete');
+            throw new errors.BadRequestError(tpl(messages.jobAlreadyComplete));
         }
 
         const rows = membersCSV.parse(job.filename);
@@ -178,8 +185,8 @@ module.exports = class MembersCSVImporter {
                 };
             } catch (error) {
                 // The model layer can sometimes throw arrays of errors
-                const errors = [].concat(error);
-                const errorMessage = errors.map(({message}) => message).join(', ');
+                const errorList = [].concat(error);
+                const errorMessage = errorList.map(({message}) => message).join(', ');
                 await trx.rollback();
                 return {
                     ...resultAccumulator,