diff --git a/client/src/components/Header/components/auth-or-profile.tsx b/client/src/components/Header/components/auth-or-profile.tsx
index 1d7560076a4..e2dc8fbe321 100644
--- a/client/src/components/Header/components/auth-or-profile.tsx
+++ b/client/src/components/Header/components/auth-or-profile.tsx
@@ -1,11 +1,15 @@
 import React from 'react';
 import { useTranslation } from 'react-i18next';
-import type { User } from '../../../redux/prop-types';
 import { Link, AvatarRenderer } from '../../helpers';
 import Login from './login';
 
 interface AuthOrProfileProps {
-  user?: User;
+  user?: {
+    isDonating: boolean;
+    username: string;
+    picture: string;
+    yearsTopContributor: string[];
+  };
 }
 const AuthOrProfile = ({ user }: AuthOrProfileProps): JSX.Element => {
   const { t } = useTranslation();
diff --git a/client/src/components/Header/components/menu-button.tsx b/client/src/components/Header/components/menu-button.tsx
index e7863a6ee40..7571296b250 100644
--- a/client/src/components/Header/components/menu-button.tsx
+++ b/client/src/components/Header/components/menu-button.tsx
@@ -2,7 +2,6 @@ import React, { RefObject } from 'react';
 import { useTranslation } from 'react-i18next';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
 import { faBars } from '@fortawesome/free-solid-svg-icons';
-import { User } from '../../../redux/prop-types';
 
 interface MenuButtonProps {
   className?: string;
@@ -10,7 +9,6 @@ interface MenuButtonProps {
   innerRef?: RefObject<HTMLButtonElement>;
   showMenu: () => void;
   hideMenu: () => void;
-  user?: User;
 }
 
 const MenuButton = ({
diff --git a/client/src/components/Header/components/nav-links.tsx b/client/src/components/Header/components/nav-links.tsx
index 5a255f19d46..591a6915f75 100644
--- a/client/src/components/Header/components/nav-links.tsx
+++ b/client/src/components/Header/components/nav-links.tsx
@@ -13,14 +13,13 @@ import { openSignoutModal, toggleTheme } from '../../../redux/actions';
 import { Link } from '../../helpers';
 import { LocalStorageThemes } from '../../../redux/types';
 import { themeSelector } from '../../../redux/selectors';
-import { User } from '../../../redux/prop-types';
 import SupporterBadge from '../../../assets/icons/supporter-badge';
 
 export interface NavLinksProps {
   displayMenu: boolean;
   showMenu: () => void;
   hideMenu: () => void;
-  user?: User;
+  user?: { isDonating: boolean; username: string };
   menuButtonRef: React.RefObject<HTMLButtonElement>;
   openSignoutModal: () => void;
   theme: LocalStorageThemes;
diff --git a/client/src/components/Header/components/universal-nav.tsx b/client/src/components/Header/components/universal-nav.tsx
index b2538c96afa..c94c613e5a1 100644
--- a/client/src/components/Header/components/universal-nav.tsx
+++ b/client/src/components/Header/components/universal-nav.tsx
@@ -7,7 +7,7 @@ import { Link, SkeletonSprite } from '../../helpers';
 import { SEARCH_EXPOSED_WIDTH } from '../../../../config/misc';
 import FreeCodeCampLogo from '../../../assets/icons/freecodecamp-logo';
 import MenuButton from './menu-button';
-import NavLinks, { type NavLinksProps } from './nav-links';
+import NavLinks from './nav-links';
 import AuthOrProfile from './auth-or-profile';
 import LanguageList from './language-list';
 
@@ -18,10 +18,17 @@ const SearchBarOptimized = Loadable(
   () => import('../../search/searchBar/search-bar-optimized')
 );
 
-type UniversalNavProps = Omit<
-  NavLinksProps,
-  'toggleTheme' | 'openSignoutModal'
-> & {
+type UniversalNavProps = {
+  displayMenu: boolean;
+  showMenu: () => void;
+  hideMenu: () => void;
+  menuButtonRef: React.RefObject<HTMLButtonElement>;
+  user: {
+    isDonating: boolean;
+    username: string;
+    picture: string;
+    yearsTopContributor: string[];
+  };
   fetchState: { pending: boolean };
   searchBarRef?: React.RefObject<HTMLDivElement>;
   pathname: string;
@@ -81,7 +88,6 @@ const UniversalNav = ({
               hideMenu={hideMenu}
               innerRef={menuButtonRef}
               showMenu={showMenu}
-              user={user}
             />
             {!isSearchExposedWidth && search}
             <NavLinks
diff --git a/client/src/components/Header/header.test.tsx b/client/src/components/Header/header.test.tsx
index d6ff7068761..4e0bcd1f8ec 100644
--- a/client/src/components/Header/header.test.tsx
+++ b/client/src/components/Header/header.test.tsx
@@ -1,24 +1,46 @@
-/* eslint-disable @typescript-eslint/no-unsafe-assignment */
-/* eslint-disable @typescript-eslint/no-unsafe-member-access */
-/* eslint-disable @typescript-eslint/no-unsafe-return */
-
 import React from 'react';
 import { create, ReactTestRendererJSON } from 'react-test-renderer';
 import AuthOrProfile from './components/auth-or-profile';
 
+const defaultUserProps = {
+  user: {
+    username: 'test-user',
+    picture: 'https://freecodecamp.org/image.png',
+    isDonating: false,
+    yearsTopContributor: []
+  },
+  pending: false,
+  pathName: '/learn'
+};
+
+const donatingUserProps = {
+  ...defaultUserProps,
+  user: {
+    ...defaultUserProps.user,
+    isDonating: true
+  }
+};
+
+const topContributorUserProps = {
+  ...defaultUserProps,
+  user: {
+    ...defaultUserProps.user,
+    yearsTopContributor: ['2020']
+  }
+};
+
+const topDonatingContributorUserProps = {
+  ...topContributorUserProps,
+  user: {
+    ...topContributorUserProps.user,
+    isDonating: true
+  }
+};
+
 jest.mock('../../analytics');
 
 describe('<AuthOrProfile />', () => {
   it('has avatar with default border for default users', () => {
-    const defaultUserProps = {
-      user: {
-        username: 'test-user',
-        picture: 'https://freecodecamp.org/image.png'
-      },
-      pending: false,
-      pathName: '/learn'
-    };
-
     const componentTree = create(
       <AuthOrProfile {...defaultUserProps} />
     ).toJSON();
@@ -26,16 +48,6 @@ describe('<AuthOrProfile />', () => {
   });
 
   it('has avatar with gold border for donating users', () => {
-    const donatingUserProps = {
-      user: {
-        username: 'test-user',
-        picture: 'https://freecodecamp.org/image.png',
-        isDonating: true
-      },
-      pending: false,
-      pathName: '/learn'
-    };
-
     const componentTree = create(
       <AuthOrProfile {...donatingUserProps} />
     ).toJSON();
@@ -43,16 +55,6 @@ describe('<AuthOrProfile />', () => {
   });
 
   it('has avatar with blue border for top contributors', () => {
-    const topContributorUserProps = {
-      user: {
-        username: 'test-user',
-        picture: 'https://freecodecamp.org/image.png',
-        yearsTopContributor: [2020]
-      },
-      pending: false,
-      pathName: '/learn'
-    };
-
     const componentTree = create(
       <AuthOrProfile {...topContributorUserProps} />
     ).toJSON();
@@ -60,17 +62,6 @@ describe('<AuthOrProfile />', () => {
   });
 
   it('has avatar with purple border for donating top contributors', () => {
-    const topDonatingContributorUserProps = {
-      user: {
-        username: 'test-user',
-        picture: 'https://freecodecamp.org/image.png',
-        isDonating: true,
-        yearsTopContributor: [2020]
-      },
-      pending: false,
-      pathName: '/learn'
-    };
-
     const componentTree = create(
       <AuthOrProfile {...topDonatingContributorUserProps} />
     ).toJSON();
@@ -78,15 +69,17 @@ describe('<AuthOrProfile />', () => {
   });
 });
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-const profileNavItem = (component: any) => component.children[0];
+type Component = {
+  children: { props: { className: string } }[];
+};
+const profileNavItem = (component: Component) => component.children[0];
 
 const avatarHasClass = (
   componentTree: ReactTestRendererJSON | ReactTestRendererJSON[] | null,
   classes: string
 ) => {
   return (
-    profileNavItem(componentTree).props.className ===
+    profileNavItem(componentTree as unknown as Component).props.className ===
     'avatar-container ' + classes
   );
 };
diff --git a/client/src/components/Header/index.tsx b/client/src/components/Header/index.tsx
index 6b3da853264..4a6ebf1fb04 100644
--- a/client/src/components/Header/index.tsx
+++ b/client/src/components/Header/index.tsx
@@ -5,7 +5,6 @@
 import React from 'react';
 import { ConnectedProps, connect } from 'react-redux';
 import { createSelector } from 'reselect';
-import { User } from '../../redux/prop-types';
 import { examInProgressSelector } from '../../redux/selectors';
 
 import UniversalNav from './components/universal-nav';
@@ -26,7 +25,12 @@ type PropsFromRedux = ConnectedProps<typeof connector>;
 
 type Props = PropsFromRedux & {
   fetchState: { pending: boolean };
-  user: User;
+  user: {
+    isDonating: boolean;
+    username: string;
+    picture: string;
+    yearsTopContributor: string[];
+  };
   skipButtonText: string;
   pathname: string;
 };
diff --git a/client/src/components/Map/index.tsx b/client/src/components/Map/index.tsx
index f405a068415..be7cca8a0fe 100644
--- a/client/src/components/Map/index.tsx
+++ b/client/src/components/Map/index.tsx
@@ -57,7 +57,6 @@ const superBlockHeadings: { [key in SuperBlockStage]: string } = {
   [SuperBlockStage.Professional]: 'landing.professional-certs-heading',
   [SuperBlockStage.Extra]: 'landing.interview-prep-heading',
   [SuperBlockStage.Legacy]: 'landing.legacy-curriculum-heading',
-  [SuperBlockStage.New]: '', // TODO: add translation
   [SuperBlockStage.Next]: 'landing.next-heading',
   [SuperBlockStage.NextEnglish]: 'landing.next-english-heading',
   [SuperBlockStage.Upcoming]: 'landing.upcoming-heading'
diff --git a/client/src/components/profile/components/portfolio.tsx b/client/src/components/profile/components/portfolio.tsx
index 7d45bae306b..11a3263323d 100644
--- a/client/src/components/profile/components/portfolio.tsx
+++ b/client/src/components/profile/components/portfolio.tsx
@@ -202,7 +202,10 @@ class PortfolioSettings extends Component<PortfolioProps, PortfolioState> {
     });
   }
 
-  getUrlValidation(url: string) {
+  getUrlValidation(url: string): {
+    state: 'success' | 'warning' | 'error';
+    message: string;
+  } {
     const { t } = this.props;
     const len = url.length;
 
diff --git a/client/src/components/profile/components/utils/index.ts b/client/src/components/profile/components/utils/index.ts
index fd9c688c050..29c6739f759 100644
--- a/client/src/components/profile/components/utils/index.ts
+++ b/client/src/components/profile/components/utils/index.ts
@@ -1 +1 @@
-export { parseDate, formatYears } from './utils';
+export { parseDate } from './utils';
diff --git a/client/src/components/profile/profile.test.tsx b/client/src/components/profile/profile.test.tsx
index bf4b8c0ca99..00815962ffa 100644
--- a/client/src/components/profile/profile.test.tsx
+++ b/client/src/components/profile/profile.test.tsx
@@ -90,6 +90,11 @@ function renderWithRedux(ui: JSX.Element) {
 }
 describe('<Profile/>', () => {
   it('renders the report button on another persons profile', () => {
+    // TODO: Profile is a mess, it shouldn't depend on the entire user. Each
+    // component Camper, Stats, HeatMap etc should be get the relevant data from
+    // the store themselves.
+
+    // @ts-expect-error - quick hack to mollify TS.
     renderWithRedux(<Profile {...notMyProfileProps} />);
 
     const reportButton: HTMLElement = screen.getByText('buttons.flag-user');
@@ -97,6 +102,7 @@ describe('<Profile/>', () => {
   });
 
   it('renders correctly', () => {
+    // @ts-expect-error - quick hack to mollify TS.
     const { container } = renderWithRedux(<Profile {...notMyProfileProps} />);
 
     expect(container).toMatchSnapshot();
diff --git a/client/src/components/settings/delete-modal.tsx b/client/src/components/settings/delete-modal.tsx
index 3a08d17e7f0..9cbe7e81e73 100644
--- a/client/src/components/settings/delete-modal.tsx
+++ b/client/src/components/settings/delete-modal.tsx
@@ -68,6 +68,7 @@ function DeleteModal(props: DeleteModalProps): JSX.Element {
           />
         </FormGroup>
         <Spacer size='xs' />
+        {/* @ts-expect-error The UI lib's types don't allow this: https://github.com/freeCodeCamp/ui/issues/473 */}
         <Button
           block={true}
           size='large'
diff --git a/client/src/components/settings/reset-modal.tsx b/client/src/components/settings/reset-modal.tsx
index 6e0ab030c7f..056339eaa0d 100644
--- a/client/src/components/settings/reset-modal.tsx
+++ b/client/src/components/settings/reset-modal.tsx
@@ -66,6 +66,7 @@ function ResetModal(props: ResetModalProps): JSX.Element {
           />
         </FormGroup>
         <Spacer size='xs' />
+        {/* @ts-expect-error freecodecamp/ui doesn't allow disable to be false: https://github.com/freeCodeCamp/ui/issues/473 */}
         <Button
           block={true}
           size='large'
diff --git a/client/src/redux/prop-types.ts b/client/src/redux/prop-types.ts
index d74118850f7..31a22f3dadd 100644
--- a/client/src/redux/prop-types.ts
+++ b/client/src/redux/prop-types.ts
@@ -152,21 +152,6 @@ export interface PrerequisiteChallenge {
   slug?: string;
 }
 
-export type ExtendedChallenge = {
-  block: string;
-  challengeType: number;
-  dashedName: string;
-  fields: {
-    slug: string;
-  };
-  id: string;
-  isCompleted: boolean;
-  order: number;
-  superBlock: SuperBlocks;
-  stepNumber: number;
-  title: string;
-};
-
 export type ChallengeNode = {
   challenge: {
     block: string;
diff --git a/client/src/templates/Introduction/components/block.tsx b/client/src/templates/Introduction/components/block.tsx
index a2f8d8cd9aa..dfccb38c518 100644
--- a/client/src/templates/Introduction/components/block.tsx
+++ b/client/src/templates/Introduction/components/block.tsx
@@ -14,7 +14,6 @@ import { isAuditedSuperBlock } from '../../../../../shared/utils/is-audited';
 import Caret from '../../../assets/icons/caret';
 import { Link } from '../../../components/helpers';
 import { completedChallengesSelector } from '../../../redux/selectors';
-import { ChallengeNode, CompletedChallenge } from '../../../redux/prop-types';
 import { playTone } from '../../../utils/tone';
 import { makeExpandedBlockSelector, toggleBlock } from '../redux';
 import { isGridBased, isProjectBased } from '../../../utils/curriculum-layout';
@@ -30,15 +29,13 @@ import './block.css';
 
 const { curriculumLocale } = envData;
 
-type Challenge = ChallengeNode['challenge'];
-
 const mapStateToProps = (state: unknown, ownProps: { block: string }) => {
   const expandedSelector = makeExpandedBlockSelector(ownProps.block);
 
   return createSelector(
     expandedSelector,
     completedChallengesSelector,
-    (isExpanded: boolean, completedChallenges: CompletedChallenge[]) => ({
+    (isExpanded: boolean, completedChallenges: { id: string }[]) => ({
       isExpanded,
       completedChallengeIds: completedChallenges.map(({ id }) => id)
     })
@@ -48,10 +45,20 @@ const mapStateToProps = (state: unknown, ownProps: { block: string }) => {
 const mapDispatchToProps = (dispatch: Dispatch) =>
   bindActionCreators({ toggleBlock }, dispatch);
 
+interface ChallengeInfo {
+  id: string;
+  title: string;
+  fields: { slug: string };
+  dashedName: string;
+  challengeType: number;
+  blockLayout: BlockLayouts;
+  superBlock: SuperBlocks;
+}
+
 interface BlockProps {
   block: string;
   blockType: BlockTypes | null;
-  challenges: Challenge[];
+  challenges: ChallengeInfo[];
   completedChallengeIds: string[];
   isExpanded: boolean;
   superBlock: SuperBlocks;
@@ -124,10 +131,10 @@ class Block extends Component<BlockProps> {
     const expandText = t('intro:misc-text.expand');
     const collapseText = t('intro:misc-text.collapse');
 
-    const isBlockCompleted = completedCount === extendedChallenges.length;
+    const isBlockCompleted = completedCount === challenges.length;
 
     const percentageCompleted = Math.floor(
-      (completedCount / extendedChallenges.length) * 100
+      (completedCount / challenges.length) * 100
     );
 
     // since the Blocks are not components, we need link to exist even if it's
@@ -142,7 +149,7 @@ class Block extends Component<BlockProps> {
       if (completedCount === 0) {
         return t('learn.not-started');
       }
-      if (completedCount === extendedChallenges.length) {
+      if (isBlockCompleted) {
         return t('learn.completed');
       }
       return `${percentageCompleted}% ${t('learn.completed')}`;
@@ -188,12 +195,12 @@ class Block extends Component<BlockProps> {
               <span
                 aria-hidden='true'
                 className='map-completed-count'
-              >{`${completedCount}/${extendedChallenges.length}`}</span>
+              >{`${completedCount}/${challenges.length}`}</span>
               <span className='sr-only'>
                 ,{' '}
                 {t('learn.challenges-completed', {
                   completedCount,
-                  totalChallenges: extendedChallenges.length
+                  totalChallenges: challenges.length
                 })}
               </span>
             </div>
diff --git a/client/src/templates/Introduction/components/challenges.tsx b/client/src/templates/Introduction/components/challenges.tsx
index d2da9b744b8..33fd24938e9 100644
--- a/client/src/templates/Introduction/components/challenges.tsx
+++ b/client/src/templates/Introduction/components/challenges.tsx
@@ -3,14 +3,23 @@ import { withTranslation, useTranslation } from 'react-i18next';
 
 import GreenNotCompleted from '../../../assets/icons/green-not-completed';
 import GreenPass from '../../../assets/icons/green-pass';
-import { ExtendedChallenge } from '../../../redux/prop-types';
 import { SuperBlocks } from '../../../../../shared/config/curriculum';
 import { challengeTypes } from '../../../../../shared/config/challenge-types';
 import { Link } from '../../../components/helpers';
 import { ButtonLink } from '../../../components/helpers/button-link';
 
+interface ChallengeInfo {
+  isCompleted: boolean;
+  fields: { slug: string };
+  dashedName: string;
+  title: string;
+  stepNumber: number;
+  superBlock: SuperBlocks;
+  challengeType: number;
+}
+
 interface Challenges {
-  challenges: ExtendedChallenge[];
+  challenges: ChallengeInfo[];
   isProjectBlock: boolean;
   isGridMap?: boolean;
   blockTitle?: string | null;
@@ -19,7 +28,7 @@ interface Challenges {
 const CheckMark = ({ isCompleted }: { isCompleted: boolean }) =>
   isCompleted ? <GreenPass /> : <GreenNotCompleted />;
 
-const ListChallenge = ({ challenge }: { challenge: ExtendedChallenge }) => (
+const ListChallenge = ({ challenge }: { challenge: ChallengeInfo }) => (
   <Link to={challenge.fields.slug}>
     <span className='map-badge'>
       <CheckMark isCompleted={challenge.isCompleted} />
@@ -28,7 +37,7 @@ const ListChallenge = ({ challenge }: { challenge: ExtendedChallenge }) => (
   </Link>
 );
 
-const CertChallenge = ({ challenge }: { challenge: ExtendedChallenge }) => (
+const CertChallenge = ({ challenge }: { challenge: ChallengeInfo }) => (
   <Link to={challenge.fields.slug}>
     {challenge.title}
     <span className='map-badge map-project-checkmark'>
@@ -38,7 +47,7 @@ const CertChallenge = ({ challenge }: { challenge: ExtendedChallenge }) => (
 );
 
 // Step or Task challenge
-const GridChallenge = ({ challenge }: { challenge: ExtendedChallenge }) => {
+const GridChallenge = ({ challenge }: { challenge: ChallengeInfo }) => {
   const { t } = useTranslation();
 
   return (
diff --git a/client/src/templates/Introduction/components/super-block-accordion.tsx b/client/src/templates/Introduction/components/super-block-accordion.tsx
index e59818d8d27..b8998657447 100644
--- a/client/src/templates/Introduction/components/super-block-accordion.tsx
+++ b/client/src/templates/Introduction/components/super-block-accordion.tsx
@@ -3,13 +3,13 @@ import { useTranslation } from 'react-i18next';
 // TODO: Add this component to freecodecamp/ui and remove this dependency
 import { Disclosure } from '@headlessui/react';
 
-import { ChallengeNode } from '../../../redux/prop-types';
 import { SuperBlocks } from '../../../../../shared/config/curriculum';
 import DropDown from '../../../assets/icons/dropdown';
 // TODO: See if there's a nice way to incorporate the structure into data Gatsby
 // sources from the curriculum, rather than importing it directly.
 import superBlockStructure from '../../../../../curriculum/superblock-structure/full-stack.json';
 import { ChapterIcon } from '../../../assets/chapter-icon';
+import { BlockLayouts, BlockTypes } from '../../../../../shared/config/blocks';
 import { FsdChapters } from '../../../../../shared/config/chapters';
 import envData from '../../../../config/env.json';
 import Block from './block';
@@ -34,8 +34,21 @@ interface ModuleProps {
   totalSteps: number;
   completedSteps: number;
 }
+
+interface Challenge {
+  id: string;
+  block: string;
+  blockType: BlockTypes;
+  title: string;
+  fields: { slug: string };
+  dashedName: string;
+  challengeType: number;
+  blockLayout: BlockLayouts;
+  superBlock: SuperBlocks;
+}
+
 interface SuperBlockTreeViewProps {
-  challenges: ChallengeNode['challenge'][];
+  challenges: Challenge[];
   superBlock: SuperBlocks;
   chosenBlock: string;
   completedChallengeIds: string[];
@@ -191,7 +204,7 @@ const LinkBlock = ({
   challenges
 }: {
   superBlock: SuperBlocks;
-  challenges?: ChallengeNode['challenge'][];
+  challenges?: Challenge[];
 }) =>
   challenges?.length ? (
     <li className='link-block'>
diff --git a/client/src/templates/Introduction/super-block-intro.tsx b/client/src/templates/Introduction/super-block-intro.tsx
index e98e19253e7..71a5f6557b8 100644
--- a/client/src/templates/Introduction/super-block-intro.tsx
+++ b/client/src/templates/Introduction/super-block-intro.tsx
@@ -24,9 +24,10 @@ import {
   userFetchStateSelector,
   signInLoadingSelector
 } from '../../redux/selectors';
-import type { ChallengeNode, User } from '../../redux/prop-types';
+import type { User } from '../../redux/prop-types';
 import { CertTitle, liveCerts } from '../../../config/cert-and-project-map';
 import { superBlockToCertMap } from '../../../../shared/config/certification-settings';
+import { BlockLayouts, BlockTypes } from '../../../../shared/config/blocks';
 import Block from './components/block';
 import CertChallenge from './components/cert-challenge';
 import LegacyLinks from './components/legacy-links';
@@ -43,6 +44,23 @@ type FetchState = {
   errored: boolean;
 };
 
+type ChallengeNode = {
+  challenge: {
+    fields: { slug: string; blockName: string };
+    id: string;
+    block: string;
+    blockType: BlockTypes;
+    challengeType: number;
+    title: string;
+    order: number;
+    superBlock: SuperBlocks;
+    dashedName: string;
+    blockLayout: BlockLayouts;
+    chapter: string;
+    module: string;
+  };
+};
+
 type SuperBlockProps = {
   currentChallengeId: string;
   data: {
diff --git a/client/utils/declarations.d.ts b/client/utils/declarations.d.ts
index 096f7d82b5b..3db53a66c4c 100644
--- a/client/utils/declarations.d.ts
+++ b/client/utils/declarations.d.ts
@@ -3,6 +3,7 @@ declare global {
     // This is a feature Gatsby adds to the `window` object.
     // https://github.com/gatsbyjs/gatsby/blob/deb41cdfefbefe0c170b5dd7c10a19ba2b338f6e/packages/gatsby/cache-dir/production-app.js#L28
     ___loader: {
+      enqueue: () => void;
       hovering: (path: string | null) => void;
     };
   }
diff --git a/client/utils/gatsby/layout-selector.test.tsx b/client/utils/gatsby/layout-selector.test.tsx
index 82c7ce7b7f7..f9ac06688f4 100644
--- a/client/utils/gatsby/layout-selector.test.tsx
+++ b/client/utils/gatsby/layout-selector.test.tsx
@@ -31,6 +31,7 @@ function getComponentNameAndProps(
   const LayoutReactComponent = layoutSelector({
     element: { type: elementType, props: {}, key: '' },
     props: {
+      data: {},
       location: {
         pathname
       },
diff --git a/shared/config/i18n.ts b/shared/config/i18n.ts
index 1db85ac3d39..1f49d26920b 100644
--- a/shared/config/i18n.ts
+++ b/shared/config/i18n.ts
@@ -112,7 +112,7 @@ export const hiddenLangs = [Languages.Korean];
 /**
  * This array contains languages that use the RTL layouts.
  */
-export const rtlLangs = [];
+export const rtlLangs: Languages[] = [];
 
 // locale is sourced from a JSON file, so we use getLangCode to
 // find the associated enum values