diff --git a/src/cli/cli.spec.ts b/src/cli/cli.spec.ts
index 2938ab81f1..e5388a2038 100644
--- a/src/cli/cli.spec.ts
+++ b/src/cli/cli.spec.ts
@@ -214,20 +214,6 @@ Jest configuration written to "${normalize('/foo/bar/package.json')}".
     "transform": {
       "^.+\\\\.[tj]sx?$": "ts-jest"
     },
-    "testMatch": [
-      "**/__tests__/**/*.js?(x)",
-      "**/?(*.)+(spec|test).js?(x)",
-      "**/__tests__/**/*.ts?(x)",
-      "**/?(*.)+(spec|test).ts?(x)"
-    ],
-    "moduleFileExtensions": [
-      "js",
-      "json",
-      "jsx",
-      "node",
-      "ts",
-      "tsx"
-    ],
     "globals": {
       "ts-jest": {
         "tsconfig": "tsconfig.test.json",
@@ -387,7 +373,7 @@ Migrated Jest configuration:
         () => ({
           jest: {
             globals: { __TS_CONFIG__: { target: 'es6' } },
-            moduleFileExtensions: ['js', 'json', 'tsx', 'jsx', 'node', 'ts'],
+            moduleFileExtensions: ['ts', 'tsx', 'js'],
             testMatch: [
               '**/__tests__/**/*.js?(x)',
               '**/?(*.)+(spec|test).js?(x)',
@@ -408,6 +394,17 @@ Migrated Jest configuration:
       }
     }
   },
+  \\"moduleFileExtensions\\": [
+    \\"js\\",
+    \\"ts\\",
+    \\"tsx\\"
+  ],
+  \\"testMatch\\": [
+    \\"**/?(*.)+(spec|test).js?(x)\\",
+    \\"**/?(*.)+(spec|test).ts?(x)\\",
+    \\"**/__tests__/**/*.js?(x)\\",
+    \\"**/__tests__/**/*.ts?(x)\\"
+  ],
   \\"preset\\": \\"ts-jest\\"
 }
 "
diff --git a/src/cli/config/init.ts b/src/cli/config/init.ts
index e295cab65b..410c76f75b 100644
--- a/src/cli/config/init.ts
+++ b/src/cli/config/init.ts
@@ -103,7 +103,6 @@ export const run: CliCommand = async (args: Arguments /* , logger: Logger */) =>
       content.push(`    },`)
       content.push(`  },`)
     }
-
     content.push('};')
 
     // join all together
diff --git a/src/config/create-jest-preset.spec.ts b/src/config/create-jest-preset.spec.ts
index 3347bb2f3d..cc67677e8a 100644
--- a/src/config/create-jest-preset.spec.ts
+++ b/src/config/create-jest-preset.spec.ts
@@ -2,8 +2,6 @@ import { createJestPreset } from './create-jest-preset'
 
 it('should return correct defaults when allowJs is false or not set', () => {
   const withoutJs = {
-    moduleFileExtensions: ['js', 'json', 'jsx', 'ts', 'tsx', 'node'],
-    testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[tj]s?(x)'],
     transform: {
       '^.+\\.tsx?$': 'ts-jest',
     },
@@ -14,8 +12,6 @@ it('should return correct defaults when allowJs is false or not set', () => {
 
 it('should return correct defaults when allowJs is true', () => {
   expect(createJestPreset({ allowJs: true })).toEqual({
-    moduleFileExtensions: ['js', 'json', 'jsx', 'ts', 'tsx', 'node'],
-    testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[tj]s?(x)'],
     transform: {
       '^.+\\.[tj]sx?$': 'ts-jest',
     },
diff --git a/src/config/create-jest-preset.ts b/src/config/create-jest-preset.ts
index 5f82022005..1d63815e6e 100644
--- a/src/config/create-jest-preset.ts
+++ b/src/config/create-jest-preset.ts
@@ -1,19 +1,11 @@
-import * as TJestConfigPkg from 'jest-config'
-
 import { rootLogger } from '../util/logger'
 
-import { getJestConfigPkg } from './jest-config-resolver'
-
 const logger = rootLogger.child({ namespace: 'jest-preset' })
 
-const jestConfigPkg: typeof TJestConfigPkg = getJestConfigPkg(logger)
-
-const defaults = jestConfigPkg.defaults
-
 export interface TsJestPresets {
   transform: Record<string, string>
-  testMatch: string[] | undefined
-  moduleFileExtensions: string[] | undefined
+  testMatch?: string[]
+  moduleFileExtensions?: string[]
 }
 
 export interface CreateJestPresetOptions {
@@ -22,16 +14,15 @@ export interface CreateJestPresetOptions {
 
 export function createJestPreset(
   { allowJs = false }: CreateJestPresetOptions = {},
-  from?: jest.InitialOptions,
+  from: jest.InitialOptions = {},
 ): TsJestPresets {
   logger.debug({ allowJs }, 'creating jest presets', allowJs ? 'handling' : 'not handling', 'JavaScript files')
-  from = { ...defaults, ...from }
   return {
     transform: {
       ...from.transform,
       [allowJs ? '^.+\\.[tj]sx?$' : '^.+\\.tsx?$']: 'ts-jest',
     },
-    testMatch: from.testMatch || undefined,
-    moduleFileExtensions: from.moduleFileExtensions || undefined,
+    ...(from.testMatch ? { testMatch: from.testMatch } : undefined),
+    ...(from.moduleFileExtensions ? { moduleFileExtensions: from.moduleFileExtensions } : undefined),
   }
 }