diff --git a/src/components/FilePopoverContent/index.jsx b/src/components/FilePopoverContent/index.jsx
index f5c13054..fa58e5c0 100644
--- a/src/components/FilePopoverContent/index.jsx
+++ b/src/components/FilePopoverContent/index.jsx
@@ -2,7 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 
 import { FormattedMessage } from '@edx/frontend-platform/i18n';
-import filesize from 'filesize';
+import { filesize } from 'filesize';
 
 import messages from './messages';
 
diff --git a/src/components/FilePopoverContent/index.test.jsx b/src/components/FilePopoverContent/index.test.jsx
index 1f917350..a1795d63 100644
--- a/src/components/FilePopoverContent/index.test.jsx
+++ b/src/components/FilePopoverContent/index.test.jsx
@@ -1,10 +1,12 @@
 import React from 'react';
 import { shallow } from '@edx/react-unit-test-utils';
 
-import filesize from 'filesize';
+import { filesize } from 'filesize';
 import FilePopoverContent from '.';
 
-jest.mock('filesize', () => (size) => `filesize(${size})`);
+jest.mock('filesize', () => ({
+  filesize: (size) => `filesize(${size})`,
+}));
 
 describe('FilePopoverContent', () => {
   describe('component', () => {