diff --git a/packages/docusaurus/src/server/__tests__/__snapshots__/config.test.ts.snap b/packages/docusaurus/src/server/__tests__/__snapshots__/config.test.ts.snap
index 165c2e74ba6a..2c20bb59c885 100644
--- a/packages/docusaurus/src/server/__tests__/__snapshots__/config.test.ts.snap
+++ b/packages/docusaurus/src/server/__tests__/__snapshots__/config.test.ts.snap
@@ -5,11 +5,8 @@ exports[`loadSiteConfig website with .cjs siteConfig 1`] = `
   "siteConfig": {
     "baseUrl": "/",
     "baseUrlIssueBanner": true,
-    "clientModules": [
-      "foo.js",
-    ],
+    "clientModules": [],
     "customFields": {},
-    "favicon": "img/docusaurus.ico",
     "i18n": {
       "defaultLocale": "en",
       "localeConfigs": {},
@@ -21,31 +18,21 @@ exports[`loadSiteConfig website with .cjs siteConfig 1`] = `
     "onBrokenLinks": "throw",
     "onBrokenMarkdownLinks": "warn",
     "onDuplicateRoutes": "warn",
-    "organizationName": "endiliey",
-    "plugins": [
-      [
-        "@docusaurus/plugin-content-docs",
-        {
-          "path": "../docs",
-        },
-      ],
-      "@docusaurus/plugin-content-pages",
-    ],
+    "plugins": [],
     "presets": [],
-    "projectName": "hello",
     "scripts": [],
     "staticDirectories": [
       "static",
     ],
     "stylesheets": [],
-    "tagline": "Hello World",
+    "tagline": "",
     "themeConfig": {},
     "themes": [],
-    "title": "Hello",
+    "title": "title",
     "titleDelimiter": "|",
-    "url": "https://docusaurus.io",
+    "url": "https://example.com",
   },
-  "siteConfigPath": "<PROJECT_ROOT>/packages/docusaurus/src/server/__tests__/__fixtures__/simple-site/docusaurus.config.js",
+  "siteConfigPath": "<PROJECT_ROOT>/packages/docusaurus/src/server/__tests__/__fixtures__/config/docusaurus.config.cjs",
 }
 `;
 
diff --git a/packages/docusaurus/src/server/__tests__/config.test.ts b/packages/docusaurus/src/server/__tests__/config.test.ts
index ba713d997562..d66a56c4f325 100644
--- a/packages/docusaurus/src/server/__tests__/config.test.ts
+++ b/packages/docusaurus/src/server/__tests__/config.test.ts
@@ -20,9 +20,7 @@ describe('loadSiteConfig', () => {
   });
 
   it('website with .cjs siteConfig', async () => {
-    const config = await loadSiteConfig({
-      siteDir: path.join(__dirname, '__fixtures__', 'simple-site'),
-    });
+    const config = await loadSiteConfig({siteDir});
     expect(config).toMatchSnapshot();
     expect(config).not.toEqual({});
   });
diff --git a/packages/docusaurus/src/server/config.ts b/packages/docusaurus/src/server/config.ts
index 7ea1eabf8340..8f2fa9c9129e 100644
--- a/packages/docusaurus/src/server/config.ts
+++ b/packages/docusaurus/src/server/config.ts
@@ -15,7 +15,7 @@ import type {LoadContext} from '@docusaurus/types';
 
 async function findConfig(siteDir: string) {
   // We could support .mjs, .ts, etc. in the future
-  const candidates = ['.js', 'cjs'].map(
+  const candidates = ['.js', '.cjs'].map(
     (ext) => DEFAULT_CONFIG_FILE_NAME + ext,
   );
   const configPath = await findAsyncSequential(
@@ -24,7 +24,8 @@ async function findConfig(siteDir: string) {
   );
   if (!configPath) {
     logger.error('No config file found.');
-    logger.info`Expected one of:${candidates}You can provide a custom config path with the code=${'--config'} option.`;
+    logger.info`Expected one of:${candidates}
+You can provide a custom config path with the code=${'--config'} option.`;
     throw new Error();
   }
   return configPath;
diff --git a/packages/docusaurus/src/server/index.ts b/packages/docusaurus/src/server/index.ts
index 4417f0f7f515..90908237b04f 100644
--- a/packages/docusaurus/src/server/index.ts
+++ b/packages/docusaurus/src/server/index.ts
@@ -156,7 +156,7 @@ next build. You can clear all build artifacts (including this folder) with the
 
   const genSiteConfig = generate(
     generatedFilesDir,
-    DEFAULT_CONFIG_FILE_NAME,
+    `${DEFAULT_CONFIG_FILE_NAME}.mjs`,
     `/*
  * AUTOGENERATED - DON'T EDIT
  * Your edits in this file will be overwritten in the next build!