diff --git a/packages/docusaurus-plugin-content-blog/src/__tests__/feed.test.ts b/packages/docusaurus-plugin-content-blog/src/__tests__/feed.test.ts
index d7747d16300c..367872215282 100644
--- a/packages/docusaurus-plugin-content-blog/src/__tests__/feed.test.ts
+++ b/packages/docusaurus-plugin-content-blog/src/__tests__/feed.test.ts
@@ -19,6 +19,7 @@ const DefaultI18N: I18n = {
   currentLocale: 'en',
   locales: ['en'],
   defaultLocale: 'en',
+  path: '1i8n',
   localeConfigs: {
     en: {
       label: 'English',
diff --git a/packages/docusaurus-utils/src/__tests__/i18nUtils.test.ts b/packages/docusaurus-utils/src/__tests__/i18nUtils.test.ts
index 6e8f4e198a7e..c0b45f358568 100644
--- a/packages/docusaurus-utils/src/__tests__/i18nUtils.test.ts
+++ b/packages/docusaurus-utils/src/__tests__/i18nUtils.test.ts
@@ -103,6 +103,7 @@ describe('localizePath', () => {
         path: '/baseUrl',
         i18n: {
           defaultLocale: 'en',
+          path: 'i18n',
           locales: ['en', 'fr'],
           currentLocale: 'fr',
           localeConfigs: {},
@@ -119,6 +120,7 @@ describe('localizePath', () => {
         path: '/baseFsPath',
         i18n: {
           defaultLocale: 'en',
+          path: 'i18n',
           locales: ['en', 'fr'],
           currentLocale: 'fr',
           localeConfigs: {},
@@ -135,6 +137,7 @@ describe('localizePath', () => {
         path: '/baseUrl/',
         i18n: {
           defaultLocale: 'en',
+          path: 'i18n',
           locales: ['en', 'fr'],
           currentLocale: 'en',
           localeConfigs: {},
@@ -151,6 +154,7 @@ describe('localizePath', () => {
         path: '/baseUrl/',
         i18n: {
           defaultLocale: 'en',
+          path: 'i18n',
           locales: ['en', 'fr'],
           currentLocale: 'en',
           localeConfigs: {},
@@ -166,6 +170,7 @@ describe('localizePath', () => {
         path: '/baseUrl/',
         i18n: {
           defaultLocale: 'en',
+          path: 'i18n',
           locales: ['en', 'fr'],
           currentLocale: 'en',
           localeConfigs: {},
diff --git a/packages/docusaurus/src/server/__tests__/i18n.test.ts b/packages/docusaurus/src/server/__tests__/i18n.test.ts
index 8c99d006545c..2f7c5f9059ff 100644
--- a/packages/docusaurus/src/server/__tests__/i18n.test.ts
+++ b/packages/docusaurus/src/server/__tests__/i18n.test.ts
@@ -8,7 +8,7 @@
 import {jest} from '@jest/globals';
 import {loadI18n, getDefaultLocaleConfig} from '../i18n';
 import {DEFAULT_I18N_CONFIG} from '../configValidation';
-import type {I18nConfig} from '@docusaurus/types';
+import type {DocusaurusConfig, I18nConfig} from '@docusaurus/types';
 
 function testLocaleConfigsFor(locales: string[]) {
   return Object.fromEntries(
@@ -18,10 +18,9 @@ function testLocaleConfigsFor(locales: string[]) {
 
 function loadI18nTest(i18nConfig: I18nConfig, locale?: string) {
   return loadI18n(
-    // @ts-expect-error: enough for this test
     {
       i18n: i18nConfig,
-    },
+    } as DocusaurusConfig,
     {locale},
   );
 }
@@ -112,6 +111,7 @@ describe('loadI18n', () => {
   it('loads I18n for multi-lang config', async () => {
     await expect(
       loadI18nTest({
+        path: 'i18n',
         defaultLocale: 'fr',
         locales: ['en', 'fr', 'de'],
         localeConfigs: {},
@@ -128,6 +128,7 @@ describe('loadI18n', () => {
     await expect(
       loadI18nTest(
         {
+          path: 'i18n',
           defaultLocale: 'fr',
           locales: ['en', 'fr', 'de'],
           localeConfigs: {},
@@ -146,6 +147,7 @@ describe('loadI18n', () => {
     await expect(
       loadI18nTest(
         {
+          path: 'i18n',
           defaultLocale: 'fr',
           locales: ['en', 'fr', 'de'],
           localeConfigs: {
@@ -175,6 +177,7 @@ describe('loadI18n', () => {
   it('warns when trying to load undeclared locale', async () => {
     await loadI18nTest(
       {
+        path: 'i18n',
         defaultLocale: 'fr',
         locales: ['en', 'fr', 'de'],
         localeConfigs: {},
diff --git a/packages/docusaurus/src/server/translations/__tests__/translations.test.ts b/packages/docusaurus/src/server/translations/__tests__/translations.test.ts
index 7d2ce1cb2811..a62aae849802 100644
--- a/packages/docusaurus/src/server/translations/__tests__/translations.test.ts
+++ b/packages/docusaurus/src/server/translations/__tests__/translations.test.ts
@@ -281,7 +281,6 @@ describe('writePluginTranslations', () => {
 
     await writePluginTranslations({
       localizationDir,
-      locale: 'fr',
       translationFile: {
         path: 'my/translation/file',
         content: {
@@ -384,7 +383,6 @@ describe('writePluginTranslations', () => {
     await expect(() =>
       writePluginTranslations({
         localizationDir,
-        locale: 'fr',
         translationFile: {
           path: 'my/translation/file.json',
           content: {},
@@ -420,7 +418,6 @@ describe('localizePluginTranslationFile', () => {
 
     const localizedTranslationFile = await localizePluginTranslationFile({
       localizationDir,
-      locale: 'fr',
       translationFile,
       plugin: {
         name: 'my-plugin-name',
@@ -453,7 +450,6 @@ describe('localizePluginTranslationFile', () => {
 
     const localizedTranslationFile = await localizePluginTranslationFile({
       localizationDir,
-      locale: 'fr',
       translationFile,
       plugin: {
         name: 'my-plugin-name',