diff --git a/client/.babelrc b/client/.babelrc
index 68cee27920..9c442fbe77 100644
--- a/client/.babelrc
+++ b/client/.babelrc
@@ -43,10 +43,6 @@
         "react-bootstrap": {
           "transform": "react-bootstrap/lib/${member}",
           "preventFullImport": true
-        },
-        "lodash": {
-          "transform": "lodash/${member}",
-          "preventFullImport": true
         }
       }
     ],
diff --git a/client/gatsby-node.js b/client/gatsby-node.js
index 133a2a1b1f..6ffe2d7e96 100644
--- a/client/gatsby-node.js
+++ b/client/gatsby-node.js
@@ -2,6 +2,8 @@ const env = require('../config/env');
 const webpack = require('webpack');
 
 const { createFilePath } = require('gatsby-source-filesystem');
+// TODO: ideally we'd remove lodash and just use lodash-es, but we can't require
+// es modules here.
 const uniq = require('lodash/uniq');
 
 const { blockNameify } = require('../utils/block-nameify');
@@ -231,10 +233,6 @@ exports.onCreateBabelConfig = ({ actions }) => {
       '@freecodecamp/react-bootstrap': {
         transform: '@freecodecamp/react-bootstrap/lib/${member}',
         preventFullImport: true
-      },
-      lodash: {
-        transform: 'lodash/${member}',
-        preventFullImport: true
       }
     }
   });
diff --git a/client/jest.config.js b/client/jest.config.js
index 94d6f71b77..45a8315c6d 100644
--- a/client/jest.config.js
+++ b/client/jest.config.js
@@ -6,7 +6,8 @@ module.exports = {
     '^(?!.*\\.module\\.css$).*\\.css$': '<rootDir>/src/__mocks__/styleMock.js',
     // CSS Modules - match files that end with 'module.css'
     '\\.module\\.css$': 'identity-obj-proxy',
-    'react-i18next': '<rootDir>/src/__mocks__/react-i18nextMock.js'
+    'react-i18next': '<rootDir>/src/__mocks__/react-i18nextMock.js',
+    '^lodash-es$': 'lodash'
   },
   testPathIgnorePatterns: ['/node_modules/', '<rootDir>/.cache/'],
   globals: {
diff --git a/client/jest.transform.js b/client/jest.transform.js
index 76ecf60501..662fd2b752 100644
--- a/client/jest.transform.js
+++ b/client/jest.transform.js
@@ -8,10 +8,6 @@ const babelOptions = {
         '@freecodecamp/react-bootstrap': {
           transform: '@freecodecamp/react-bootstrap/lib/${member}',
           preventFullImport: true
-        },
-        lodash: {
-          transform: 'lodash/${member}',
-          preventFullImport: true
         }
       }
     ]
diff --git a/client/package-lock.json b/client/package-lock.json
index d43d011a85..35ffcb8773 100644
--- a/client/package-lock.json
+++ b/client/package-lock.json
@@ -5236,6 +5236,15 @@
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.1.0.tgz",
       "integrity": "sha512-1Yj8h9Q+QDF5FzhMs/c9+6UntbD5MkRfRwac8DoEm9ZfUBZ7tZ55YcGVAzEe4bXsdQHEk+s9S5wsOKVdZrw0tQ=="
     },
+    "bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "optional": true,
+      "requires": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
     "bl": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
@@ -9765,6 +9774,12 @@
         "typedarray-to-buffer": "^3.1.5"
       }
     },
+    "file-uri-to-path": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
+      "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==",
+      "optional": true
+    },
     "filesize": {
       "version": "6.1.0",
       "resolved": "https://registry.npmjs.org/filesize/-/filesize-6.1.0.tgz",
@@ -17136,6 +17151,11 @@
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
       "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="
     },
+    "lodash-es": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.21.tgz",
+      "integrity": "sha512-mKnC+QJ9pWVzv+C4/U3rRsHapFfHvQFoFB92e52xeyGMcX6/OlIl78je1u8vePzYZSkkogMPJ2yjxxsb89cxyw=="
+    },
     "lodash.camelcase": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz",
@@ -18133,6 +18153,12 @@
       "resolved": "https://registry.npmjs.org/name-all-modules-plugin/-/name-all-modules-plugin-1.0.1.tgz",
       "integrity": "sha1-Cr+2rYNXGLn7Te8GdOBmV6lUN1w="
     },
+    "nan": {
+      "version": "2.14.2",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.2.tgz",
+      "integrity": "sha512-M2ufzIiINKCuDfBSAUr1vWQ+vuVcA9kqx8JJUsbQi6yf1uGRyb7HfpdfUr5qLXf3B/t8dPvcjhKMmlfnP47EzQ==",
+      "optional": true
+    },
     "nanoid": {
       "version": "3.1.22",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.22.tgz",
@@ -25479,7 +25505,11 @@
           "version": "1.2.13",
           "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.13.tgz",
           "integrity": "sha512-oWb1Z6mkHIskLzEJ/XWX0srkpkTQ7vaopMQkyaEIoq0fmtFVxOthb8cCxeT+p3ynTdkk/RZwbgG4brR5BeWECw==",
-          "optional": true
+          "optional": true,
+          "requires": {
+            "bindings": "^1.5.0",
+            "nan": "^2.12.1"
+          }
         },
         "globby": {
           "version": "6.1.0",
diff --git a/client/package.json b/client/package.json
index 8b8eff295a..e425d2b4d1 100644
--- a/client/package.json
+++ b/client/package.json
@@ -81,6 +81,7 @@
     "i18next": "19.9.2",
     "jquery": "3.6.0",
     "lodash": "4.17.21",
+    "lodash-es": "4.17.21",
     "monaco-editor": "0.22.3",
     "nanoid": "3.1.22",
     "path-browserify": "1.0.1",
diff --git a/client/src/client-only-routes/ShowCertification.js b/client/src/client-only-routes/ShowCertification.js
index 54342fa76f..e98c7af2cd 100644
--- a/client/src/client-only-routes/ShowCertification.js
+++ b/client/src/client-only-routes/ShowCertification.js
@@ -32,7 +32,7 @@ import envData from '../../../config/env.json';
 
 import RedirectHome from '../components/RedirectHome';
 import { Loader, Spacer } from '../components/helpers';
-import { isEmpty } from 'lodash';
+import { isEmpty } from 'lodash-es';
 import { User } from '../redux/propTypes';
 
 const { clientLocale } = envData;
diff --git a/client/src/client-only-routes/ShowProfileOrFourOhFour.js b/client/src/client-only-routes/ShowProfileOrFourOhFour.js
index c752db7d3b..f61428f56b 100644
--- a/client/src/client-only-routes/ShowProfileOrFourOhFour.js
+++ b/client/src/client-only-routes/ShowProfileOrFourOhFour.js
@@ -1,7 +1,7 @@
 import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
-import { isEmpty } from 'lodash';
+import { isEmpty } from 'lodash-es';
 
 import Loader from '../components/helpers/Loader';
 import {
diff --git a/client/src/client-only-routes/ShowProjectLinks.js b/client/src/client-only-routes/ShowProjectLinks.js
index 783cea9666..6abf6599b4 100644
--- a/client/src/client-only-routes/ShowProjectLinks.js
+++ b/client/src/client-only-routes/ShowProjectLinks.js
@@ -6,7 +6,7 @@ import { maybeUrlRE } from '../utils';
 import { Spacer, Link } from '../components/helpers';
 import { projectMap, legacyProjectMap } from '../resources/certAndProjectMap';
 import ProjectModal from '../components/SolutionViewer/ProjectModal';
-import { find, first } from 'lodash';
+import { find, first } from 'lodash-es';
 import { Trans, useTranslation } from 'react-i18next';
 
 const propTypes = {
diff --git a/client/src/client/workers/test-evaluator.js b/client/src/client/workers/test-evaluator.js
index cec40e4eba..c6415642cd 100644
--- a/client/src/client/workers/test-evaluator.js
+++ b/client/src/client/workers/test-evaluator.js
@@ -1,6 +1,6 @@
 import chai from 'chai';
 import '@babel/polyfill';
-import __toString from 'lodash/toString';
+import { toString as __toString } from 'lodash-es';
 import { format as __format } from '../../utils/format';
 import curriculumHelpers from '../../utils/curriculum-helpers';
 
diff --git a/client/src/components/formHelpers/FormFields.js b/client/src/components/formHelpers/FormFields.js
index 12ae3ab1fc..1864462d12 100644
--- a/client/src/components/formHelpers/FormFields.js
+++ b/client/src/components/formHelpers/FormFields.js
@@ -1,5 +1,5 @@
 import React from 'react';
-import { kebabCase } from 'lodash';
+import { kebabCase } from 'lodash-es';
 import normalizeUrl from 'normalize-url';
 import PropTypes from 'prop-types';
 import {
diff --git a/client/src/components/profile/components/Certifications.js b/client/src/components/profile/components/Certifications.js
index 70b1e43963..9b325c4991 100644
--- a/client/src/components/profile/components/Certifications.js
+++ b/client/src/components/profile/components/Certifications.js
@@ -1,6 +1,6 @@
 import React, { Fragment } from 'react';
 import PropTypes from 'prop-types';
-import { curry } from 'lodash';
+import { curry } from 'lodash-es';
 import { createSelector } from 'reselect';
 import { connect } from 'react-redux';
 import { Row, Col } from '@freecodecamp/react-bootstrap';
diff --git a/client/src/components/profile/components/TimeLine.js b/client/src/components/profile/components/TimeLine.js
index f6f2f773cc..111624c20a 100644
--- a/client/src/components/profile/components/TimeLine.js
+++ b/client/src/components/profile/components/TimeLine.js
@@ -1,6 +1,6 @@
 import React, { Component, useMemo } from 'react';
 import PropTypes from 'prop-types';
-import { reverse, sortBy } from 'lodash';
+import { reverse, sortBy } from 'lodash-es';
 import {
   Button,
   Modal,
diff --git a/client/src/components/search/searchBar/SearchBar.js b/client/src/components/search/searchBar/SearchBar.js
index dfd00e7994..3d35637f7e 100644
--- a/client/src/components/search/searchBar/SearchBar.js
+++ b/client/src/components/search/searchBar/SearchBar.js
@@ -5,7 +5,7 @@ import { bindActionCreators } from 'redux';
 import { createSelector } from 'reselect';
 import { SearchBox } from 'react-instantsearch-dom';
 import { HotKeys, ObserveKeys } from 'react-hotkeys';
-import { isEqual } from 'lodash';
+import { isEqual } from 'lodash-es';
 import { withTranslation } from 'react-i18next';
 import { searchPageUrl } from '../../../utils/algolia-locale-setup';
 
diff --git a/client/src/components/search/searchBar/SearchHits.js b/client/src/components/search/searchBar/SearchHits.js
index 99e35b20a0..2284fbacac 100644
--- a/client/src/components/search/searchBar/SearchHits.js
+++ b/client/src/components/search/searchBar/SearchHits.js
@@ -1,7 +1,7 @@
 import React, { useEffect } from 'react';
 import PropTypes from 'prop-types';
 import { connectStateResults, connectHits } from 'react-instantsearch-dom';
-import isEmpty from 'lodash/isEmpty';
+import { isEmpty } from 'lodash-es';
 import { useTranslation } from 'react-i18next';
 import { searchPageUrl } from '../../../utils/algolia-locale-setup';
 
diff --git a/client/src/components/search/searchPage/SearchPageHits.js b/client/src/components/search/searchPage/SearchPageHits.js
index c86879043f..3a78e45cb8 100644
--- a/client/src/components/search/searchPage/SearchPageHits.js
+++ b/client/src/components/search/searchPage/SearchPageHits.js
@@ -5,7 +5,7 @@ import {
   connectStateResults,
   connectAutoComplete
 } from 'react-instantsearch-dom';
-import { isEmpty } from 'lodash';
+import { isEmpty } from 'lodash-es';
 
 import EmptySearch from './EmptySearch';
 import NoResults from './NoResults';
diff --git a/client/src/components/settings/Certification.js b/client/src/components/settings/Certification.js
index d4fa6f0cef..bfe08b93b6 100644
--- a/client/src/components/settings/Certification.js
+++ b/client/src/components/settings/Certification.js
@@ -2,7 +2,7 @@ import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import { bindActionCreators } from 'redux';
 import { connect } from 'react-redux';
-import { find, first, values, isString } from 'lodash';
+import { find, first, values, isString } from 'lodash-es';
 import {
   Table,
   Button,
diff --git a/client/src/components/settings/Portfolio.js b/client/src/components/settings/Portfolio.js
index fdf683dc2f..91f15c001f 100644
--- a/client/src/components/settings/Portfolio.js
+++ b/client/src/components/settings/Portfolio.js
@@ -8,7 +8,7 @@ import {
   FormControl,
   HelpBlock
 } from '@freecodecamp/react-bootstrap';
-import { findIndex, find, isEqual } from 'lodash';
+import { findIndex, find, isEqual } from 'lodash-es';
 import isURL from 'validator/lib/isURL';
 import { withTranslation } from 'react-i18next';
 
diff --git a/client/src/pages/update-email.js b/client/src/pages/update-email.js
index 6f7472499b..6c0b63814e 100644
--- a/client/src/pages/update-email.js
+++ b/client/src/pages/update-email.js
@@ -16,7 +16,7 @@ import {
 } from '@freecodecamp/react-bootstrap';
 import Helmet from 'react-helmet';
 import isEmail from 'validator/lib/isEmail';
-import { isString } from 'lodash';
+import { isString } from 'lodash-es';
 import { withTranslation } from 'react-i18next';
 
 import { Spacer } from '../components/helpers';
diff --git a/client/src/redux/error-saga.js b/client/src/redux/error-saga.js
index 7da7be605f..7d4e60d9cb 100644
--- a/client/src/redux/error-saga.js
+++ b/client/src/redux/error-saga.js
@@ -1,6 +1,6 @@
 import { navigate } from 'gatsby';
 import { takeEvery, put } from 'redux-saga/effects';
-import { isError } from 'lodash';
+import { isError } from 'lodash-es';
 
 import { isHandledError, unwrapHandledError } from '../utils/handled-error';
 import { reportClientSideError } from '../utils/report-error';
diff --git a/client/src/redux/index.js b/client/src/redux/index.js
index a2aefef204..9e3175f7c5 100644
--- a/client/src/redux/index.js
+++ b/client/src/redux/index.js
@@ -1,5 +1,5 @@
 import { createAction, handleActions } from 'redux-actions';
-import { uniqBy } from 'lodash';
+import { uniqBy } from 'lodash-es';
 import store from 'store';
 
 import { createTypes, createAsyncTypes } from '../utils/createTypes';
diff --git a/client/src/templates/Challenges/classic/DesktopLayout.js b/client/src/templates/Challenges/classic/DesktopLayout.js
index f342e40334..cfd8797d9a 100644
--- a/client/src/templates/Challenges/classic/DesktopLayout.js
+++ b/client/src/templates/Challenges/classic/DesktopLayout.js
@@ -1,7 +1,7 @@
 import React, { Component, Fragment } from 'react';
 import { ReflexContainer, ReflexSplitter, ReflexElement } from 'react-reflex';
 import PropTypes from 'prop-types';
-import { first } from 'lodash';
+import { first } from 'lodash-es';
 import EditorTabs from './EditorTabs';
 import ActionRow from './ActionRow';
 import envData from '../../../../../config/env.json';
diff --git a/client/src/templates/Challenges/components/CompletionModal.js b/client/src/templates/Challenges/components/CompletionModal.js
index 8ebfaf9d87..4862d89dd6 100644
--- a/client/src/templates/Challenges/components/CompletionModal.js
+++ b/client/src/templates/Challenges/components/CompletionModal.js
@@ -1,6 +1,6 @@
 import React, { Component } from 'react';
 import PropTypes from 'prop-types';
-import noop from 'lodash/noop';
+import { noop } from 'lodash-es';
 import { connect } from 'react-redux';
 import { createSelector } from 'reselect';
 import { Button, Modal } from '@freecodecamp/react-bootstrap';
diff --git a/client/src/templates/Challenges/components/Output.js b/client/src/templates/Challenges/components/Output.js
index ee1a5c90b6..02e36a898e 100644
--- a/client/src/templates/Challenges/components/Output.js
+++ b/client/src/templates/Challenges/components/Output.js
@@ -3,7 +3,7 @@ import PropTypes from 'prop-types';
 import sanitizeHtml from 'sanitize-html';
 
 import './output.css';
-import { isEmpty } from 'lodash';
+import { isEmpty } from 'lodash-es';
 
 const propTypes = {
   defaultOutput: PropTypes.string,
diff --git a/client/src/templates/Challenges/rechallenge/builders.js b/client/src/templates/Challenges/rechallenge/builders.js
index 180644b7b5..5d1a0dbf6e 100644
--- a/client/src/templates/Challenges/rechallenge/builders.js
+++ b/client/src/templates/Challenges/rechallenge/builders.js
@@ -6,7 +6,7 @@ import {
   partial,
   stubTrue,
   template as _template
-} from 'lodash';
+} from 'lodash-es';
 
 import {
   compileHeadTail,
diff --git a/client/src/templates/Challenges/rechallenge/throwers.js b/client/src/templates/Challenges/rechallenge/throwers.js
index 80e862ee07..36219388fc 100644
--- a/client/src/templates/Challenges/rechallenge/throwers.js
+++ b/client/src/templates/Challenges/rechallenge/throwers.js
@@ -1,4 +1,4 @@
-import { cond, identity, stubTrue, conforms } from 'lodash';
+import { cond, identity, stubTrue, conforms } from 'lodash-es';
 
 const HTML$JSReg = /html|js/;
 
diff --git a/client/src/templates/Challenges/rechallenge/transformers.js b/client/src/templates/Challenges/rechallenge/transformers.js
index 59e5a52e41..80a67a556f 100644
--- a/client/src/templates/Challenges/rechallenge/transformers.js
+++ b/client/src/templates/Challenges/rechallenge/transformers.js
@@ -8,7 +8,7 @@ import {
   overSome,
   partial,
   stubTrue
-} from 'lodash';
+} from 'lodash-es';
 
 import protect from '@freecodecamp/loop-protect';
 
diff --git a/client/src/templates/Challenges/redux/execute-challenge-saga.js b/client/src/templates/Challenges/redux/execute-challenge-saga.js
index d54c17be9d..436ccfa6ed 100644
--- a/client/src/templates/Challenges/redux/execute-challenge-saga.js
+++ b/client/src/templates/Challenges/redux/execute-challenge-saga.js
@@ -11,7 +11,7 @@ import {
   cancel
 } from 'redux-saga/effects';
 import { channel } from 'redux-saga';
-import escape from 'lodash/escape';
+import { escape } from 'lodash-es';
 import i18next from 'i18next';
 
 import {
diff --git a/client/src/templates/Challenges/redux/index.js b/client/src/templates/Challenges/redux/index.js
index cd9e664b94..866b98f5dd 100644
--- a/client/src/templates/Challenges/redux/index.js
+++ b/client/src/templates/Challenges/redux/index.js
@@ -14,7 +14,7 @@ import { createCurrentChallengeSaga } from './current-challenge-saga';
 import { challengeTypes } from '../../../../utils/challengeTypes';
 import { getTargetEditor } from '../utils/getTargetEditor';
 import { completedChallengesSelector } from '../../../redux';
-import { isEmpty } from 'lodash';
+import { isEmpty } from 'lodash-es';
 
 export const ns = 'challenge';
 export const backendNS = 'backendChallenge';
diff --git a/client/src/templates/Challenges/utils/frame.js b/client/src/templates/Challenges/utils/frame.js
index 60c44be152..47e1cfa1c3 100644
--- a/client/src/templates/Challenges/utils/frame.js
+++ b/client/src/templates/Challenges/utils/frame.js
@@ -1,4 +1,4 @@
-import { toString, flow } from 'lodash';
+import { toString, flow } from 'lodash-es';
 import { format } from '../../../utils/format';
 
 // we use two different frames to make them all essentially pure functions
diff --git a/client/src/templates/Challenges/utils/getTargetEditor.js b/client/src/templates/Challenges/utils/getTargetEditor.js
index 950ab5153f..9c9972ddb7 100644
--- a/client/src/templates/Challenges/utils/getTargetEditor.js
+++ b/client/src/templates/Challenges/utils/getTargetEditor.js
@@ -1,5 +1,5 @@
 import { toSortedArray } from '../../../../../utils/sort-files';
-import { isEmpty } from 'lodash';
+import { isEmpty } from 'lodash-es';
 
 export function getTargetEditor(challengeFiles) {
   if (isEmpty(challengeFiles)) return null;
diff --git a/client/src/templates/Introduction/SuperBlockIntro.js b/client/src/templates/Introduction/SuperBlockIntro.js
index bc3fd497bf..4d0d104c01 100644
--- a/client/src/templates/Introduction/SuperBlockIntro.js
+++ b/client/src/templates/Introduction/SuperBlockIntro.js
@@ -2,7 +2,7 @@ import React, { Component, Fragment } from 'react';
 import PropTypes from 'prop-types';
 import Helmet from 'react-helmet';
 import { graphql } from 'gatsby';
-import { uniq } from 'lodash';
+import { uniq } from 'lodash-es';
 import { connect } from 'react-redux';
 import { createSelector } from 'reselect';
 import { bindActionCreators } from 'redux';
diff --git a/client/src/utils/handled-error.js b/client/src/utils/handled-error.js
index eb66ebac14..8aa7ce6ec0 100644
--- a/client/src/utils/handled-error.js
+++ b/client/src/utils/handled-error.js
@@ -1,4 +1,4 @@
-import { has } from 'lodash';
+import { has } from 'lodash-es';
 
 import standardErrorMessage from './standardErrorMessage';
 import reportedErrorMessage from './reportedErrorMessage';
diff --git a/client/src/utils/handled-error.test.js b/client/src/utils/handled-error.test.js
index 08a6866a33..0048eb8d95 100644
--- a/client/src/utils/handled-error.test.js
+++ b/client/src/utils/handled-error.test.js
@@ -1,5 +1,5 @@
 /* global expect */
-import { isObject } from 'lodash';
+import { isObject } from 'lodash-es';
 import sinon from 'sinon';
 import {
   isHandledError,
diff --git a/curriculum/package-lock.json b/curriculum/package-lock.json
index e5c5f5a03f..1b6435982e 100644
--- a/curriculum/package-lock.json
+++ b/curriculum/package-lock.json
@@ -5905,6 +5905,27 @@
         }
       }
     },
+    "mock-require": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/mock-require/-/mock-require-3.0.3.tgz",
+      "integrity": "sha512-lLzfLHcyc10MKQnNUCv7dMcoY/2Qxd6wJfbqCcVk3LDb8An4hF6ohk5AztrvgKhJCqj36uyzi/p5se+tvyD+Wg==",
+      "dev": true,
+      "requires": {
+        "get-caller-file": "^1.0.2",
+        "normalize-path": "^2.1.1"
+      },
+      "dependencies": {
+        "normalize-path": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-2.1.1.tgz",
+          "integrity": "sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=",
+          "dev": true,
+          "requires": {
+            "remove-trailing-separator": "^1.0.1"
+          }
+        }
+      }
+    },
     "morgan": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/morgan/-/morgan-1.10.0.tgz",
diff --git a/curriculum/package.json b/curriculum/package.json
index 801bb11afa..af1bd698ce 100644
--- a/curriculum/package.json
+++ b/curriculum/package.json
@@ -55,6 +55,7 @@
     "live-server": "1.2.1",
     "lodash": "4.17.21",
     "mocha": "8.3.2",
+    "mock-require": "3.0.3",
     "puppeteer": "8.0.0",
     "readdirp": "3.6.0",
     "rehype": "11.0.0",
diff --git a/curriculum/test/test-challenges.js b/curriculum/test/test-challenges.js
index 572443c95c..b4840dedd1 100644
--- a/curriculum/test/test-challenges.js
+++ b/curriculum/test/test-challenges.js
@@ -17,6 +17,13 @@ require('@babel/register')({
   only: [clientPath]
 });
 
+const mockRequire = require('mock-require');
+const lodash = require('lodash');
+
+// lodash-es can't easily be used in node environments, so we just mock it out
+// for the original lodash in testing.
+mockRequire('lodash-es', lodash);
+
 const createPseudoWorker = require('./utils/pseudo-worker');
 const {
   default: createWorker
@@ -24,7 +31,8 @@ const {
 
 const { assert, AssertionError } = require('chai');
 const Mocha = require('mocha');
-const { flatten, isEmpty, cloneDeep, isEqual } = require('lodash');
+
+const { flatten, isEmpty, cloneDeep, isEqual } = lodash;
 const { getLines } = require('../../utils/get-lines');
 
 const jsdom = require('jsdom');