diff --git a/.codesandbox/ci.json b/.codesandbox/ci.json
index 56e443414a77d7..b5739bdfeab878 100644
--- a/.codesandbox/ci.json
+++ b/.codesandbox/ci.json
@@ -28,7 +28,6 @@
     "@mui/styled-engine-sc": "packages/mui-styled-engine-sc/build",
     "@mui/system": "packages/mui-system/build",
     "@mui/private-theming": "packages/mui-private-theming/build",
-    "@mui/private-classnames": "packages/mui-private-classnames/build",
     "@mui/types": "packages/mui-types/build",
     "@mui/utils": "packages/mui-utils/build",
     "@mui/base": "packages/mui-base/build",
diff --git a/babel.config.js b/babel.config.js
index eb4564898f6525..6a0a54d455f095 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -18,7 +18,6 @@ const defaultAlias = {
   '@mui/styles': resolveAliasPath('./packages/mui-styles/src'),
   '@mui/system': resolveAliasPath('./packages/mui-system/src'),
   '@mui/private-theming': resolveAliasPath('./packages/mui-private-theming/src'),
-  '@mui/private-classnames': resolveAliasPath('./packages/mui-private-classnames/src'),
   '@mui/base': resolveAliasPath('./packages/mui-base/src'),
   '@mui/utils': resolveAliasPath('./packages/mui-utils/src'),
   '@mui/material-next': resolveAliasPath('./packages/mui-material-next/src'),
diff --git a/docs/babel.config.js b/docs/babel.config.js
index 653356009027eb..10e5cba9e03e5c 100644
--- a/docs/babel.config.js
+++ b/docs/babel.config.js
@@ -25,7 +25,6 @@ const alias = {
   // '@mui/styled-engine': '../packages/mui-styled-engine-sc/src',
   '@mui/system': '../packages/mui-system/src',
   '@mui/private-theming': '../packages/mui-private-theming/src',
-  '@mui/private-classnames': '../packages/mui-private-classnames/src',
   '@mui/utils': '../packages/mui-utils/src',
   '@mui/base': '../packages/mui-base/src',
   '@mui/material-next': '../packages/mui-material-next/src',
diff --git a/docs/next.config.js b/docs/next.config.js
index 94f2c8bf8626fa..957610f1227de8 100644
--- a/docs/next.config.js
+++ b/docs/next.config.js
@@ -137,7 +137,6 @@ module.exports = {
                         '@mui/styles': '../packages/mui-styles/src',
                         '@mui/system': '../packages/mui-system/src',
                         '@mui/private-theming': '../packages/mui-private-theming/src',
-                        '@mui/private-classnames': '../packages/mui-private-classnames/src',
                         '@mui/utils': '../packages/mui-utils/src',
                         '@mui/base': '../packages/mui-base/src',
                         '@mui/material-next': '../packages/mui-material-next/src',
diff --git a/docs/src/modules/utils/helpers.ts b/docs/src/modules/utils/helpers.ts
index 7c271fe80f6d4d..29f08319059b2a 100644
--- a/docs/src/modules/utils/helpers.ts
+++ b/docs/src/modules/utils/helpers.ts
@@ -169,7 +169,6 @@ export function getDependencies(
     '@mui/styles': getMuiPackageVersion('styles', muiCommitRef),
     '@mui/system': getMuiPackageVersion('system', muiCommitRef),
     '@mui/private-theming': getMuiPackageVersion('theming', muiCommitRef),
-    '@mui/private-classnames': getMuiPackageVersion('classnames', muiCommitRef),
     '@mui/base': getMuiPackageVersion('base', muiCommitRef),
     '@mui/utils': getMuiPackageVersion('utils', muiCommitRef),
     '@mui/material-next': getMuiPackageVersion('material-next', muiCommitRef),
diff --git a/packages/mui-base/package.json b/packages/mui-base/package.json
index 42ac9fd4cfae40..8a96b557405a3b 100644
--- a/packages/mui-base/package.json
+++ b/packages/mui-base/package.json
@@ -53,7 +53,6 @@
   "dependencies": {
     "@babel/runtime": "^7.17.2",
     "@emotion/is-prop-valid": "^1.1.2",
-    "@mui/private-classnames": "^5.7.0",
     "@mui/types": "^7.1.3",
     "@mui/utils": "^5.7.0",
     "@popperjs/core": "^2.11.5",
diff --git a/packages/mui-base/src/className/index.ts b/packages/mui-base/src/className/index.ts
index c4c756777ff267..30ab5fea27cdef 100644
--- a/packages/mui-base/src/className/index.ts
+++ b/packages/mui-base/src/className/index.ts
@@ -1,2 +1,2 @@
 // eslint-disable-next-line import/prefer-default-export
-export { unstable_ClassNameGenerator } from '@mui/private-classnames';
+export { unstable_ClassNameGenerator } from '@mui/utils';
diff --git a/packages/mui-base/src/composeClasses/index.ts b/packages/mui-base/src/composeClasses/index.ts
index 6f85c85eaaaf21..f42d6324769fb9 100644
--- a/packages/mui-base/src/composeClasses/index.ts
+++ b/packages/mui-base/src/composeClasses/index.ts
@@ -1 +1 @@
-export { unstable_composeClasses as default } from '@mui/private-classnames';
+export { unstable_composeClasses as default } from '@mui/utils';
diff --git a/packages/mui-base/src/generateUtilityClass/index.ts b/packages/mui-base/src/generateUtilityClass/index.ts
index a3f20ff03a1bf3..19bb1127412e87 100644
--- a/packages/mui-base/src/generateUtilityClass/index.ts
+++ b/packages/mui-base/src/generateUtilityClass/index.ts
@@ -1,2 +1,2 @@
-export { generateUtilityClass as default } from '@mui/private-classnames';
-export type { GlobalStateSlot } from '@mui/private-classnames';
+export { unstable_generateUtilityClass as default } from '@mui/utils';
+export type { GlobalStateSlot } from '@mui/utils';
diff --git a/packages/mui-base/src/generateUtilityClasses/index.ts b/packages/mui-base/src/generateUtilityClasses/index.ts
index d76af6edb5ebeb..cc94914f4095da 100644
--- a/packages/mui-base/src/generateUtilityClasses/index.ts
+++ b/packages/mui-base/src/generateUtilityClasses/index.ts
@@ -1 +1 @@
-export { generateUtilityClasses as default } from '@mui/private-classnames';
+export { unstable_generateUtilityClasses as default } from '@mui/utils';
diff --git a/packages/mui-base/tsconfig.build.json b/packages/mui-base/tsconfig.build.json
index 3b375ebf5e89fb..a45de38c5d2fd4 100644
--- a/packages/mui-base/tsconfig.build.json
+++ b/packages/mui-base/tsconfig.build.json
@@ -11,6 +11,5 @@
     "rootDir": "./src"
   },
   "include": ["src/**/*.ts*"],
-  "exclude": ["src/**/*.spec.ts*", "src/**/*.test.ts*"],
-  "references": [{ "path": "../mui-private-classnames/tsconfig.build.json" }]
+  "exclude": ["src/**/*.spec.ts*", "src/**/*.test.ts*"]
 }
diff --git a/packages/mui-material/package.json b/packages/mui-material/package.json
index 5c18871658b2ee..72c91be770be01 100644
--- a/packages/mui-material/package.json
+++ b/packages/mui-material/package.json
@@ -62,7 +62,6 @@
   "dependencies": {
     "@babel/runtime": "^7.17.2",
     "@mui/base": "5.0.0-alpha.80",
-    "@mui/private-classnames": "^5.7.0",
     "@mui/system": "^5.7.0",
     "@mui/types": "^7.1.3",
     "@mui/utils": "^5.7.0",
diff --git a/packages/mui-material/scripts/rollup.config.js b/packages/mui-material/scripts/rollup.config.js
index f99d87da5749b6..baf67d692ca589 100644
--- a/packages/mui-material/scripts/rollup.config.js
+++ b/packages/mui-material/scripts/rollup.config.js
@@ -102,10 +102,6 @@ const nestedFolder = {
       return resolveNestedImport('mui-private-theming', importee);
     }
 
-    if (importee.indexOf('@mui/private-classnames/') === 0) {
-      return resolveNestedImport('mui-private-classnames', importee);
-    }
-
     if (importee.indexOf('@mui/styled-engine/') === 0) {
       return resolveNestedImport('mui-styled-engine', importee);
     }
diff --git a/packages/mui-material/src/className/index.ts b/packages/mui-material/src/className/index.ts
index c4c756777ff267..30ab5fea27cdef 100644
--- a/packages/mui-material/src/className/index.ts
+++ b/packages/mui-material/src/className/index.ts
@@ -1,2 +1,2 @@
 // eslint-disable-next-line import/prefer-default-export
-export { unstable_ClassNameGenerator } from '@mui/private-classnames';
+export { unstable_ClassNameGenerator } from '@mui/utils';
diff --git a/packages/mui-private-classnames/README.md b/packages/mui-private-classnames/README.md
deleted file mode 100644
index c8cbb9ef392196..00000000000000
--- a/packages/mui-private-classnames/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# @mui/private-classnames
-
-React classnames utils used internally in the other MUI component libraries packages.
diff --git a/packages/mui-private-classnames/package.json b/packages/mui-private-classnames/package.json
deleted file mode 100644
index 01e4bedcb74d1a..00000000000000
--- a/packages/mui-private-classnames/package.json
+++ /dev/null
@@ -1,46 +0,0 @@
-{
-  "name": "@mui/private-classnames",
-  "version": "5.7.0",
-  "private": false,
-  "author": "MUI Team",
-  "description": "Private - React classnames utils used internally in the other MUI component libraries packages.",
-  "main": "./src/index.js",
-  "keywords": [
-    "classnames",
-    "mui"
-  ],
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/mui/material-ui.git",
-    "directory": "packages/mui-private-classnames"
-  },
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/mui/material-ui/issues"
-  },
-  "homepage": "https://mui.com/",
-  "funding": {
-    "type": "opencollective",
-    "url": "https://opencollective.com/mui"
-  },
-  "scripts": {
-    "build": "yarn build:legacy && yarn build:modern && yarn build:node && yarn build:stable && yarn build:types && yarn build:copy-files",
-    "build:legacy": "node ../../scripts/build legacy",
-    "build:modern": "node ../../scripts/build modern",
-    "build:node": "node ../../scripts/build node",
-    "build:stable": "node ../../scripts/build stable",
-    "build:copy-files": "node ../../scripts/copy-files.js",
-    "build:types": "node ../../scripts/buildTypes",
-    "prebuild": "rimraf build tsconfig.build.tsbuildinfo",
-    "release": "yarn build && npm publish build",
-    "test": "cd ../../ && cross-env NODE_ENV=test mocha 'packages/mui-private-classnames/**/*.test.{js,ts,tsx}'",
-    "typescript": "tslint -p tsconfig.json \"{src,test}/**/*.{spec,d}.{ts,tsx}\" && tsc -p tsconfig.json"
-  },
-  "sideEffects": false,
-  "publishConfig": {
-    "access": "public"
-  },
-  "engines": {
-    "node": ">=12.0.0"
-  }
-}
diff --git a/packages/mui-private-classnames/src/index.d.ts b/packages/mui-private-classnames/src/index.d.ts
deleted file mode 100644
index 090856a548a230..00000000000000
--- a/packages/mui-private-classnames/src/index.d.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-export { default as unstable_composeClasses } from './composeClasses';
-export * from './composeClasses';
-
-export { default as generateUtilityClass } from './generateUtilityClass';
-export * from './generateUtilityClass';
-
-export { default as generateUtilityClasses } from './generateUtilityClasses';
-export * from './generateUtilityClasses';
-
-export { default as unstable_ClassNameGenerator } from './ClassNameGenerator';
-export * from './ClassNameGenerator';
diff --git a/packages/mui-private-classnames/src/index.js b/packages/mui-private-classnames/src/index.js
deleted file mode 100644
index 325aec03d241be..00000000000000
--- a/packages/mui-private-classnames/src/index.js
+++ /dev/null
@@ -1,4 +0,0 @@
-export { default as unstable_composeClasses } from './composeClasses';
-export { default as generateUtilityClass } from './generateUtilityClass';
-export { default as generateUtilityClasses } from './generateUtilityClasses';
-export { default as unstable_ClassNameGenerator } from './ClassNameGenerator';
diff --git a/packages/mui-private-classnames/tsconfig.build.json b/packages/mui-private-classnames/tsconfig.build.json
deleted file mode 100644
index a45de38c5d2fd4..00000000000000
--- a/packages/mui-private-classnames/tsconfig.build.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{
-  // This config is for emitting declarations (.d.ts) only
-  // Actual .ts source files are transpiled via babel
-  "extends": "./tsconfig",
-  "compilerOptions": {
-    "composite": true,
-    "declaration": true,
-    "noEmit": false,
-    "emitDeclarationOnly": true,
-    "outDir": "build",
-    "rootDir": "./src"
-  },
-  "include": ["src/**/*.ts*"],
-  "exclude": ["src/**/*.spec.ts*", "src/**/*.test.ts*"]
-}
diff --git a/packages/mui-private-classnames/tsconfig.json b/packages/mui-private-classnames/tsconfig.json
deleted file mode 100644
index 57220954971e1e..00000000000000
--- a/packages/mui-private-classnames/tsconfig.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "extends": "../../tsconfig",
-  "include": ["src/**/*", "test/**/*"]
-}
diff --git a/packages/mui-system/src/Container/containerClasses.ts b/packages/mui-system/src/Container/containerClasses.ts
index 6b10ea28770c22..fc68f10115c6ad 100644
--- a/packages/mui-system/src/Container/containerClasses.ts
+++ b/packages/mui-system/src/Container/containerClasses.ts
@@ -1,4 +1,7 @@
-import { generateUtilityClass, generateUtilityClasses } from '@mui/private-classnames';
+import {
+  unstable_generateUtilityClass as generateUtilityClass,
+  unstable_generateUtilityClasses as generateUtilityClasses,
+} from '@mui/utils';
 
 export interface ContainerClasses {
   /** Styles applied to the root element. */
diff --git a/packages/mui-system/src/Container/createContainer.tsx b/packages/mui-system/src/Container/createContainer.tsx
index b7af2a095bc5dd..05a9d6b5b9f5b9 100644
--- a/packages/mui-system/src/Container/createContainer.tsx
+++ b/packages/mui-system/src/Container/createContainer.tsx
@@ -2,12 +2,12 @@ import * as React from 'react';
 import PropTypes from 'prop-types';
 import clsx from 'clsx';
 import { Interpolation, StyledComponent } from '@mui/styled-engine';
-import { unstable_capitalize as capitalize } from '@mui/utils';
 import { OverridableComponent } from '@mui/types';
 import {
+  unstable_capitalize as capitalize,
   unstable_composeClasses as composeClasses,
-  generateUtilityClass,
-} from '@mui/private-classnames';
+  unstable_generateUtilityClass as generateUtilityClass,
+} from '@mui/utils';
 import { ContainerProps, ContainerTypeMap } from './ContainerProps';
 import useThemePropsSystem from '../useThemeProps';
 import systemStyled from '../styled';
diff --git a/packages/mui-system/tsconfig.build.json b/packages/mui-system/tsconfig.build.json
index 5412a24dd5d6a0..d591edd03a441a 100644
--- a/packages/mui-system/tsconfig.build.json
+++ b/packages/mui-system/tsconfig.build.json
@@ -11,6 +11,5 @@
     "rootDir": "./src"
   },
   "include": ["src/**/*.ts*"],
-  "exclude": ["src/**/*.spec.ts", "src/**/*.test.ts"],
-  "references": [{ "path": "../mui-private-classnames/tsconfig.build.json" }]
+  "exclude": ["src/**/*.spec.ts", "src/**/*.test.ts"]
 }
diff --git a/packages/mui-utils/package.json b/packages/mui-utils/package.json
index 7c0e21758f75e2..070071c5d91ce0 100644
--- a/packages/mui-utils/package.json
+++ b/packages/mui-utils/package.json
@@ -26,14 +26,14 @@
     "url": "https://opencollective.com/mui"
   },
   "scripts": {
-    "build": "yarn build:legacy && yarn build:modern && yarn build:node && yarn build:stable && yarn build:copy-files && yarn build:types",
+    "build": "yarn build:legacy && yarn build:modern && yarn build:node && yarn build:stable && yarn build:types && yarn build:copy-files",
     "build:legacy": "node ../../scripts/build legacy",
     "build:modern": "node ../../scripts/build modern",
     "build:node": "node ../../scripts/build node",
     "build:stable": "node ../../scripts/build stable",
     "build:copy-files": "node ../../scripts/copy-files.js",
     "build:types": "node ../../scripts/buildTypes",
-    "prebuild": "rimraf build",
+    "prebuild": "rimraf build tsconfig.build.tsbuildinfo",
     "release": "yarn build && npm publish build",
     "test": "cd ../../ && cross-env NODE_ENV=test mocha 'packages/mui-utils/**/*.test.{js,ts,tsx}'",
     "typescript": "tslint -p tsconfig.json \"{src,test}/**/*.{spec,d}.{ts,tsx}\" && tsc -p tsconfig.json"
diff --git a/packages/mui-private-classnames/src/ClassNameGenerator/ClassNameGenerator.ts b/packages/mui-utils/src/ClassNameGenerator/ClassNameGenerator.ts
similarity index 100%
rename from packages/mui-private-classnames/src/ClassNameGenerator/ClassNameGenerator.ts
rename to packages/mui-utils/src/ClassNameGenerator/ClassNameGenerator.ts
diff --git a/packages/mui-private-classnames/src/ClassNameGenerator/index.ts b/packages/mui-utils/src/ClassNameGenerator/index.ts
similarity index 100%
rename from packages/mui-private-classnames/src/ClassNameGenerator/index.ts
rename to packages/mui-utils/src/ClassNameGenerator/index.ts
diff --git a/packages/mui-private-classnames/src/composeClasses/composeClasses.test.js b/packages/mui-utils/src/composeClasses/composeClasses.test.ts
similarity index 98%
rename from packages/mui-private-classnames/src/composeClasses/composeClasses.test.js
rename to packages/mui-utils/src/composeClasses/composeClasses.test.ts
index 9c7133623fdc70..61af819b25efc8 100644
--- a/packages/mui-private-classnames/src/composeClasses/composeClasses.test.js
+++ b/packages/mui-utils/src/composeClasses/composeClasses.test.ts
@@ -1,5 +1,5 @@
 import { expect } from 'chai';
-import { unstable_composeClasses as composeClasses } from '@mui/private-classnames';
+import { unstable_composeClasses as composeClasses } from '@mui/utils';
 
 describe('composeClasses', () => {
   it('should generate the classes based on the slots', () => {
diff --git a/packages/mui-private-classnames/src/composeClasses/composeClasses.ts b/packages/mui-utils/src/composeClasses/composeClasses.ts
similarity index 100%
rename from packages/mui-private-classnames/src/composeClasses/composeClasses.ts
rename to packages/mui-utils/src/composeClasses/composeClasses.ts
diff --git a/packages/mui-private-classnames/src/composeClasses/index.ts b/packages/mui-utils/src/composeClasses/index.ts
similarity index 100%
rename from packages/mui-private-classnames/src/composeClasses/index.ts
rename to packages/mui-utils/src/composeClasses/index.ts
diff --git a/packages/mui-private-classnames/src/generateUtilityClass/generateUtilityClass.test.js b/packages/mui-utils/src/generateUtilityClass/generateUtilityClass.test.ts
similarity index 91%
rename from packages/mui-private-classnames/src/generateUtilityClass/generateUtilityClass.test.js
rename to packages/mui-utils/src/generateUtilityClass/generateUtilityClass.test.ts
index 5c65409670940e..ec4a28cb0b510b 100644
--- a/packages/mui-private-classnames/src/generateUtilityClass/generateUtilityClass.test.js
+++ b/packages/mui-utils/src/generateUtilityClass/generateUtilityClass.test.ts
@@ -1,8 +1,8 @@
 import { expect } from 'chai';
 import {
-  generateUtilityClass,
+  unstable_generateUtilityClass as generateUtilityClass,
   unstable_ClassNameGenerator as ClassNameGenerator,
-} from '@mui/private-classnames';
+} from '@mui/utils';
 
 describe('generateUtilityClass', () => {
   it('should generate the class correctly', () => {
@@ -27,14 +27,14 @@ describe('generateUtilityClass', () => {
     });
 
     it('able to set custom generator', () => {
-      const generator = (name) => `foo-bar-${name}`;
+      const generator = (name: string) => `foo-bar-${name}`;
       ClassNameGenerator.configure(generator);
 
       expect(generateUtilityClass('MuiTest', 'slot')).to.equal('foo-bar-MuiTest-slot');
     });
 
     it('does not affect state class', () => {
-      const generator = (name) => `foo-bar-${name}`;
+      const generator = (name: string) => `foo-bar-${name}`;
       ClassNameGenerator.configure(generator);
 
       expect(generateUtilityClass('MuiTest', 'active')).to.equal('Mui-active');
diff --git a/packages/mui-private-classnames/src/generateUtilityClass/generateUtilityClass.ts b/packages/mui-utils/src/generateUtilityClass/generateUtilityClass.ts
similarity index 100%
rename from packages/mui-private-classnames/src/generateUtilityClass/generateUtilityClass.ts
rename to packages/mui-utils/src/generateUtilityClass/generateUtilityClass.ts
diff --git a/packages/mui-private-classnames/src/generateUtilityClass/index.ts b/packages/mui-utils/src/generateUtilityClass/index.ts
similarity index 100%
rename from packages/mui-private-classnames/src/generateUtilityClass/index.ts
rename to packages/mui-utils/src/generateUtilityClass/index.ts
diff --git a/packages/mui-private-classnames/src/generateUtilityClasses/generateUtilityClasses.test.js b/packages/mui-utils/src/generateUtilityClasses/generateUtilityClasses.test.ts
similarity index 91%
rename from packages/mui-private-classnames/src/generateUtilityClasses/generateUtilityClasses.test.js
rename to packages/mui-utils/src/generateUtilityClasses/generateUtilityClasses.test.ts
index b6a0e9a596ee58..4dd812baaf3571 100644
--- a/packages/mui-private-classnames/src/generateUtilityClasses/generateUtilityClasses.test.js
+++ b/packages/mui-utils/src/generateUtilityClasses/generateUtilityClasses.test.ts
@@ -1,5 +1,5 @@
 import { expect } from 'chai';
-import { generateUtilityClasses } from '@mui/private-classnames';
+import { unstable_generateUtilityClasses as generateUtilityClasses } from '@mui/utils';
 
 describe('generateUtilityClasses', () => {
   it('should generate the classes correctly', () => {
diff --git a/packages/mui-private-classnames/src/generateUtilityClasses/generateUtilityClasses.ts b/packages/mui-utils/src/generateUtilityClasses/generateUtilityClasses.ts
similarity index 100%
rename from packages/mui-private-classnames/src/generateUtilityClasses/generateUtilityClasses.ts
rename to packages/mui-utils/src/generateUtilityClasses/generateUtilityClasses.ts
diff --git a/packages/mui-private-classnames/src/generateUtilityClasses/index.ts b/packages/mui-utils/src/generateUtilityClasses/index.ts
similarity index 100%
rename from packages/mui-private-classnames/src/generateUtilityClasses/index.ts
rename to packages/mui-utils/src/generateUtilityClasses/index.ts
diff --git a/packages/mui-utils/src/index.ts b/packages/mui-utils/src/index.ts
index 30ac8b832caf1d..8def5d5daa2f00 100644
--- a/packages/mui-utils/src/index.ts
+++ b/packages/mui-utils/src/index.ts
@@ -34,3 +34,8 @@ export { default as usePreviousProps } from './usePreviousProps';
 export { default as visuallyHidden } from './visuallyHidden';
 export { default as integerPropType } from './integerPropType';
 export { default as internal_resolveProps } from './resolveProps';
+export { default as unstable_composeClasses } from './composeClasses';
+export { default as unstable_generateUtilityClass } from './generateUtilityClass';
+export * from './generateUtilityClass';
+export { default as unstable_generateUtilityClasses } from './generateUtilityClasses';
+export { default as unstable_ClassNameGenerator } from './ClassNameGenerator';
diff --git a/scripts/sizeSnapshot/webpack.config.js b/scripts/sizeSnapshot/webpack.config.js
index 19a1299f9504f4..fe935fd850052a 100644
--- a/scripts/sizeSnapshot/webpack.config.js
+++ b/scripts/sizeSnapshot/webpack.config.js
@@ -216,10 +216,6 @@ function createWebpackConfig(entry, environment) {
         '@mui/styles': path.join(workspaceRoot, 'packages/mui-styles/build'),
         '@mui/system': path.join(workspaceRoot, 'packages/mui-system/build'),
         '@mui/private-theming': path.join(workspaceRoot, 'packages/mui-private-theming/build'),
-        '@mui/private-classnames': path.join(
-          workspaceRoot,
-          'packages/mui-private-classnames/build',
-        ),
         '@mui/utils': path.join(workspaceRoot, 'packages/mui-utils/build'),
         '@mui/base': path.join(workspaceRoot, 'packages/mui-base/build'),
         '@mui/material-next': path.join(workspaceRoot, 'packages/mui-material-next/build'),
diff --git a/test/karma.conf.js b/test/karma.conf.js
index 6fb8c01f2a8c23..10a1c1b6b10f3f 100644
--- a/test/karma.conf.js
+++ b/test/karma.conf.js
@@ -156,7 +156,6 @@ module.exports = function setKarmaConfig(config) {
                         '@mui/styles': './packages/mui-styles/src',
                         '@mui/system': './packages/mui-system/src',
                         '@mui/private-theming': './packages/mui-private-theming/src',
-                        '@mui/private-classnames': './packages/mui-private-classnames/src',
                         '@mui/utils': './packages/mui-utils/src',
                         '@mui/base': './packages/mui-base/src',
                         '@mui/material-next': './packages/mui-material-next/src',
diff --git a/tsconfig.json b/tsconfig.json
index a61b20607acd9d..d37353239f3796 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -28,8 +28,6 @@
       "@mui/system": ["./packages/mui-system/src"],
       "@mui/private-theming": ["./packages/mui-private-theming/src"],
       "@mui/private-theming/*": ["./packages/mui-private-theming/src/*"],
-      "@mui/private-classnames": ["./packages/mui-private-classnames/src"],
-      "@mui/private-classnames/*": ["./packages/mui-private-classnames/src/*"],
       "@mui/types": ["./packages/mui-types"],
       "@mui/base": ["./packages/mui-base/src"],
       "@mui/base/*": ["./packages/mui-base/src/*"],
diff --git a/webpackBaseConfig.js b/webpackBaseConfig.js
index 57aff1f9e24d34..a12b5c108f60e0 100644
--- a/webpackBaseConfig.js
+++ b/webpackBaseConfig.js
@@ -18,7 +18,6 @@ module.exports = {
       '@mui/styles': path.resolve(__dirname, './packages/mui-styles/src'),
       '@mui/system': path.resolve(__dirname, './packages/mui-system/src'),
       '@mui/private-theming': path.resolve(__dirname, './packages/mui-private-theming/src'),
-      '@mui/private-classnames': path.resolve(__dirname, './packages/mui-private-classnames/src'),
       '@mui/base': path.resolve(__dirname, './packages/mui-base/src'),
       '@mui/utils': path.resolve(__dirname, './packages/mui-utils/src'),
       '@mui/material-next': path.resolve(__dirname, './packages/mui-material-next/src'),