diff --git a/src/__helpers__/fakers.ts b/src/__helpers__/fakers.ts
index f96b43c2f5..936ee00d3f 100644
--- a/src/__helpers__/fakers.ts
+++ b/src/__helpers__/fakers.ts
@@ -4,7 +4,7 @@ import type { Config } from '@jest/types'
 import type { Logger } from 'bs-logger'
 
 import { TsCompiler } from '../compiler'
-import { ConfigSet } from '../config'
+import { ConfigSet } from '../legacy/config/config-set'
 import type { StringMap, TsJestGlobalOptions } from '../types'
 import type { ImportReasons } from '../utils/messages'
 
diff --git a/src/compiler/ts-compiler.ts b/src/compiler/ts-compiler.ts
index c973fe230d..73c63b05ef 100644
--- a/src/compiler/ts-compiler.ts
+++ b/src/compiler/ts-compiler.ts
@@ -23,8 +23,8 @@ import type {
   TranspileOutput,
 } from 'typescript'
 
-import type { ConfigSet } from '../config'
 import { LINE_FEED, TS_TSX_REGEX } from '../constants'
+import type { ConfigSet } from '../legacy/config/config-set'
 import type {
   DepGraphInfo,
   StringMap,
diff --git a/src/compiler/ts-jest-compiler.ts b/src/compiler/ts-jest-compiler.ts
index 88169a50aa..c7fe28e385 100644
--- a/src/compiler/ts-jest-compiler.ts
+++ b/src/compiler/ts-jest-compiler.ts
@@ -1,6 +1,6 @@
 import type { TransformedSource } from '@jest/transform'
 
-import type { ConfigSet } from '../config'
+import type { ConfigSet } from '../legacy/config/config-set'
 import type { CompilerInstance, StringMap, TsJestCompileOptions } from '../types'
 
 import { TsCompiler } from './ts-compiler'
diff --git a/src/config/index.ts b/src/config/index.ts
index c160ca4257..6310d2e9e8 100644
--- a/src/config/index.ts
+++ b/src/config/index.ts
@@ -1,2 +1 @@
-export * from './config-set'
 export * from './paths-to-module-name-mapper'
diff --git a/src/config/__snapshots__/config-set.spec.ts.snap b/src/legacy/config/__snapshots__/config-set.spec.ts.snap
similarity index 100%
rename from src/config/__snapshots__/config-set.spec.ts.snap
rename to src/legacy/config/__snapshots__/config-set.spec.ts.snap
diff --git a/src/config/config-set.spec.ts b/src/legacy/config/config-set.spec.ts
similarity index 98%
rename from src/config/config-set.spec.ts
rename to src/legacy/config/config-set.spec.ts
index 046014b3cb..503d45d6dd 100644
--- a/src/config/config-set.spec.ts
+++ b/src/legacy/config/config-set.spec.ts
@@ -4,20 +4,20 @@ import type { Transformer } from '@jest/transform'
 import { LogLevels, testing } from 'bs-logger'
 import ts from 'typescript'
 
-import { createConfigSet } from '../__helpers__/fakers'
-import { logTargetMock } from '../__helpers__/mocks'
-import type { AstTransformerDesc, TsJestGlobalOptions } from '../types'
-import { stringify } from '../utils'
-import * as _backports from '../utils/backports'
-import { getPackageVersion } from '../utils/get-package-version'
-import { normalizeSlashes } from '../utils/normalize-slashes'
-import { sha1 } from '../utils/sha1'
+import { createConfigSet } from '../../__helpers__/fakers'
+import { logTargetMock } from '../../__helpers__/mocks'
+import type { AstTransformerDesc, TsJestGlobalOptions } from '../../types'
+import { stringify } from '../../utils'
+import * as _backports from '../../utils/backports'
+import { getPackageVersion } from '../../utils/get-package-version'
+import { normalizeSlashes } from '../../utils/normalize-slashes'
+import { sha1 } from '../../utils/sha1'
 
 import { ConfigSet, MY_DIGEST } from './config-set'
 
-jest.mock('../utils/backports')
+jest.mock('../../utils/backports')
 jest.mock('../index')
-jest.mock('../utils/get-package-version')
+jest.mock('../../utils/get-package-version')
 
 const backports = jest.mocked(_backports)
 
@@ -305,7 +305,7 @@ describe('babelJestTransformer', () => {
 
   it('should return babelJestTransformer with loaded config object', () => {
     /* eslint-disable-next-line jest/no-mocks-import */
-    const babelConfig = require('../__mocks__/babel-foo.config')
+    const babelConfig = require('../../__mocks__/babel-foo.config')
     const cs = createConfigSet({
       jestConfig: {
         globals: {
@@ -668,7 +668,9 @@ describe('resolvePath', () => {
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     const cs = createConfigSet({ jestConfig: { rootDir: '/root', cwd: '/cwd' } as any, resolve: null })
     const doResolve = (path: string) => cs.resolvePath(path, { throwIfMissing: false, nodeResolve: true })
-    expect(doResolve('json5')).toBe(resolve(__dirname, '../../node_modules/json5', require('json5/package.json').main))
+    expect(doResolve('json5')).toBe(
+      resolve(__dirname, '../../../node_modules/json5', require('json5/package.json').main),
+    )
     expect(doResolve('./bar.js')).toBe(resolve('/cwd/bar.js'))
     expect(doResolve('<rootDir>bar.js')).toBe(resolve('/root/bar.js'))
     expect(doResolve('<rootDir>/bar.js')).toBe(resolve('/root//bar.js'))
diff --git a/src/config/config-set.ts b/src/legacy/config/config-set.ts
similarity index 96%
rename from src/config/config-set.ts
rename to src/legacy/config/config-set.ts
index 2e2efe9f99..5c7e0eb8e0 100644
--- a/src/config/config-set.ts
+++ b/src/legacy/config/config-set.ts
@@ -17,8 +17,8 @@ import { globsToMatcher } from 'jest-util'
 import json5 from 'json5'
 import type * as ts from 'typescript'
 
-import { DEFAULT_JEST_TEST_MATCH, JS_JSX_EXTENSIONS } from '../constants'
-import type { RawCompilerOptions } from '../raw-compiler-options'
+import { DEFAULT_JEST_TEST_MATCH, JS_JSX_EXTENSIONS } from '../../constants'
+import type { RawCompilerOptions } from '../../raw-compiler-options'
 import type {
   AstTransformer,
   AstTransformerDesc,
@@ -29,20 +29,20 @@ import type {
   TsJestDiagnosticsCfg,
   TsJestGlobalOptions,
   TTypeScript,
-} from '../types'
-import { TsCompilerInstance } from '../types'
-import { rootLogger, stringify } from '../utils'
-import { backportJestConfig } from '../utils/backports'
-import { importer } from '../utils/importer'
-import { Errors, ImportReasons, interpolate } from '../utils/messages'
-import { normalizeSlashes } from '../utils/normalize-slashes'
-import { sha1 } from '../utils/sha1'
-import { TSError } from '../utils/ts-error'
+} from '../../types'
+import { TsCompilerInstance } from '../../types'
+import { rootLogger, stringify } from '../../utils'
+import { backportJestConfig } from '../../utils/backports'
+import { importer } from '../../utils/importer'
+import { Errors, ImportReasons, interpolate } from '../../utils/messages'
+import { normalizeSlashes } from '../../utils/normalize-slashes'
+import { sha1 } from '../../utils/sha1'
+import { TSError } from '../../utils/ts-error'
 
 /**
  * @internal
  */
-export const MY_DIGEST: string = readFileSync(resolve(__dirname, '..', '..', '.ts-jest-digest'), 'utf8')
+export const MY_DIGEST: string = readFileSync(resolve(__dirname, '../../../.ts-jest-digest'), 'utf8')
 
 /**
  * @internal
@@ -313,7 +313,7 @@ export class ConfigSet {
     this.logger.debug({ tsconfig: this.parsedTsConfig }, 'normalized typescript config via ts-jest option')
 
     // transformers
-    this.resolvedTransformers.before = [require('../transformers/hoist-jest')]
+    this.resolvedTransformers.before = [require('../../transformers/hoist-jest')]
     const { astTransformers } = options
     if (astTransformers) {
       const resolveTransformerFunc = (transformerPath: string) => {
diff --git a/src/legacy/ts-jest-transformer.ts b/src/legacy/ts-jest-transformer.ts
index 84d8498b13..e5da0e4ba0 100644
--- a/src/legacy/ts-jest-transformer.ts
+++ b/src/legacy/ts-jest-transformer.ts
@@ -5,7 +5,6 @@ import type { SyncTransformer, TransformedSource } from '@jest/transform'
 import type { Logger } from 'bs-logger'
 
 import { TsJestCompiler } from '../compiler'
-import { ConfigSet } from '../config'
 import { DECLARATION_TYPE_EXT, JS_JSX_REGEX, TS_TSX_REGEX } from '../constants'
 import type { CompilerInstance, DepGraphInfo, ProjectConfigTsJest, TransformOptionsTsJest } from '../types'
 import { parse, stringify, JsonableValue, rootLogger } from '../utils'
@@ -14,6 +13,8 @@ import { Deprecations, Errors, interpolate } from '../utils/messages'
 import { sha1 } from '../utils/sha1'
 import { VersionCheckers } from '../utils/version-checkers'
 
+import { ConfigSet } from './config/config-set'
+
 interface CachedConfigSet {
   configSet: ConfigSet
   jestConfig: JsonableValue<ProjectConfigTsJest>
diff --git a/src/types.ts b/src/types.ts
index db1506a9f4..b92df70942 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -4,7 +4,7 @@ import type * as babelJest from 'babel-jest'
 import type * as _babel from 'babel__core'
 import type * as _ts from 'typescript'
 
-import type { ConfigSet } from './config'
+import type { ConfigSet } from './legacy/config/config-set'
 import type { RawCompilerOptions } from './raw-compiler-options'
 
 declare module '@jest/types' {