diff --git a/packages/component-helper-service/src/services/Fragment.js b/packages/component-helper-service/src/services/Fragment.js
index 6d846b693d4993dbf2b15df7421d93bb043258b5..15267b2d0349ac73ed0ecc4d28126fedcc7ac32b 100644
--- a/packages/component-helper-service/src/services/Fragment.js
+++ b/packages/component-helper-service/src/services/Fragment.js
@@ -71,7 +71,7 @@ class Fragment {
       )
 
       const userHelper = new User({ UserModel })
-      const activeAuthors = userHelper.getActiveAuthors(authors)
+      const activeAuthors = await userHelper.getActiveAuthors(authors)
 
       const authorsList = activeAuthors.map(
         author => `${author.firstName} ${author.lastName}`,
diff --git a/packages/component-manuscript-manager/src/tests/fragments/post.test.js b/packages/component-manuscript-manager/src/tests/fragments/post.test.js
index 8e2a7f08443408f64d4c079b323ffdc9082aba54..07b6ff7a80ec6024f7e9126551c001eeeb32fad9 100644
--- a/packages/component-manuscript-manager/src/tests/fragments/post.test.js
+++ b/packages/component-manuscript-manager/src/tests/fragments/post.test.js
@@ -8,6 +8,7 @@ const requests = require('../requests')
 const { Model, fixtures } = fixturesService
 jest.mock('pubsweet-component-mail-service', () => ({
   sendNotificationEmail: jest.fn(),
+  sendSimpleEmail: jest.fn(),
 }))
 const reqBody = {}
 
diff --git a/packages/component-user-manager/src/routes/fragmentsUsers/get.js b/packages/component-user-manager/src/routes/fragmentsUsers/get.js
index ebb0cd045ac5b5a9a4348b6c288e642aff29473d..646163deaa6d0bc62f7129055e4cda04bf64cada 100644
--- a/packages/component-user-manager/src/routes/fragmentsUsers/get.js
+++ b/packages/component-user-manager/src/routes/fragmentsUsers/get.js
@@ -12,7 +12,7 @@ module.exports = models => async (req, res) => {
 
     const { authors = [] } = await models.Fragment.find(fragmentId)
     const userHelper = new User({ UserModel: models.User })
-    const activeAuthors = userHelper.getActiveAuthors(authors)
+    const activeAuthors = await userHelper.getActiveAuthors(authors)
 
     return res.status(200).json(activeAuthors)
   } catch (e) {