diff --git a/examples/example-app-monorepo/apps/app1/jest-esm-isolated.config.mjs b/examples/example-app-monorepo/apps/app1/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-monorepo/apps/app1/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-monorepo/apps/app1/jest-esm-isolated.config.ts b/examples/example-app-monorepo/apps/app1/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-monorepo/apps/app1/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/apps/app1/jest-esm.config.mjs b/examples/example-app-monorepo/apps/app1/jest-esm.config.mjs
deleted file mode 100644
index 697b429291..0000000000
--- a/examples/example-app-monorepo/apps/app1/jest-esm.config.mjs
+++ /dev/null
@@ -1,27 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-import { pathsToModuleNameMapper } from 'ts-jest';
-import tsconfig from './tsconfig.json' assert { type: 'json' };
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  displayName: 'app1',
-  moduleNameMapper: {
-    ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-monorepo/apps/app1/jest-esm.config.ts b/examples/example-app-monorepo/apps/app1/jest-esm.config.ts
new file mode 100644
index 0000000000..ca7cd2ad37
--- /dev/null
+++ b/examples/example-app-monorepo/apps/app1/jest-esm.config.ts
@@ -0,0 +1,25 @@
+import ngPreset from 'jest-preset-angular/presets';
+import { pathsToModuleNameMapper, type JestConfigWithTsJest } from 'ts-jest';
+
+import tsconfig from './tsconfig.json';
+
+export default {
+    ...ngPreset.defaultsESM,
+    displayName: 'app1',
+    moduleNameMapper: {
+        ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/apps/app1/jest-isolated.config.js b/examples/example-app-monorepo/apps/app1/jest-isolated.config.js
deleted file mode 100644
index 19cc6d10ff..0000000000
--- a/examples/example-app-monorepo/apps/app1/jest-isolated.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
-
-const jestCfg = require('./jest.config');
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    ...jestCfg,
-    transform: {
-        '^.+\\.(ts|js|mjs|html|svg)$': [
-            'jest-preset-angular',
-            {
-                ...defaultTransformerOptions,
-                isolatedModules: true,
-            },
-        ],
-    },
-};
diff --git a/examples/example-app-monorepo/apps/app1/jest-isolated.config.ts b/examples/example-app-monorepo/apps/app1/jest-isolated.config.ts
new file mode 100644
index 0000000000..cfde54a067
--- /dev/null
+++ b/examples/example-app-monorepo/apps/app1/jest-isolated.config.ts
@@ -0,0 +1,17 @@
+import presets from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|mjs|html|svg)$': [
+            'jest-preset-angular',
+            {
+                ...presets.defaultTransformerOptions,
+                isolatedModules: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/apps/app1/jest.config.js b/examples/example-app-monorepo/apps/app1/jest.config.js
deleted file mode 100644
index c6fb09254e..0000000000
--- a/examples/example-app-monorepo/apps/app1/jest.config.js
+++ /dev/null
@@ -1,11 +0,0 @@
-const { pathsToModuleNameMapper } = require('ts-jest');
-
-const { paths } = require('./tsconfig.json').compilerOptions;
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    displayName: 'app1',
-    preset: 'jest-preset-angular',
-    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-    moduleNameMapper: pathsToModuleNameMapper(paths, { prefix: '<rootDir>' }),
-};
diff --git a/examples/example-app-monorepo/apps/app1/jest.config.ts b/examples/example-app-monorepo/apps/app1/jest.config.ts
new file mode 100644
index 0000000000..b37361dbc5
--- /dev/null
+++ b/examples/example-app-monorepo/apps/app1/jest.config.ts
@@ -0,0 +1,10 @@
+import { pathsToModuleNameMapper, type JestConfigWithTsJest } from 'ts-jest';
+
+import { compilerOptions } from './tsconfig.json';
+
+export default {
+    displayName: 'app1',
+    preset: 'jest-preset-angular',
+    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
+    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/apps/app1/tsconfig.json b/examples/example-app-monorepo/apps/app1/tsconfig.json
index 268b4e2447..fc83fb6d2f 100644
--- a/examples/example-app-monorepo/apps/app1/tsconfig.json
+++ b/examples/example-app-monorepo/apps/app1/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig-base.json",
+  "extends": "../../tsconfig.json",
   "compilerOptions": {
     "baseUrl": "./",
     "paths": {
diff --git a/examples/example-app-monorepo/jest-esm-isolated.config.mjs b/examples/example-app-monorepo/jest-esm-isolated.config.mjs
deleted file mode 100644
index 61e25a2a6c..0000000000
--- a/examples/example-app-monorepo/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,6 +0,0 @@
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  projects: ['<rootDir>/apps/app1/jest-esm-isolated.config.mjs', '<rootDir>/libs/user/jest-esm-isolated.config.mjs'],
-};
-
-export default jestConfig;
diff --git a/examples/example-app-monorepo/jest-esm-isolated.config.ts b/examples/example-app-monorepo/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..9214d3d0b4
--- /dev/null
+++ b/examples/example-app-monorepo/jest-esm-isolated.config.ts
@@ -0,0 +1,5 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
+    projects: ['<rootDir>/apps/app1/jest-esm-isolated.config.ts', '<rootDir>/libs/user/jest-esm-isolated.config.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/jest-esm.config.mjs b/examples/example-app-monorepo/jest-esm.config.mjs
deleted file mode 100644
index f80ed7b173..0000000000
--- a/examples/example-app-monorepo/jest-esm.config.mjs
+++ /dev/null
@@ -1,6 +0,0 @@
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  projects: ['<rootDir>/apps/app1/jest-esm.config.mjs', '<rootDir>/libs/user/jest-esm.config.mjs'],
-};
-
-export default jestConfig;
diff --git a/examples/example-app-monorepo/jest-esm.config.ts b/examples/example-app-monorepo/jest-esm.config.ts
new file mode 100644
index 0000000000..6fe6e888cc
--- /dev/null
+++ b/examples/example-app-monorepo/jest-esm.config.ts
@@ -0,0 +1,5 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
+    projects: ['<rootDir>/apps/app1/jest-esm.config.ts', '<rootDir>/libs/user/jest-esm.config.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/jest-isolated.config.js b/examples/example-app-monorepo/jest-isolated.config.js
deleted file mode 100644
index 42787f3fb7..0000000000
--- a/examples/example-app-monorepo/jest-isolated.config.js
+++ /dev/null
@@ -1,4 +0,0 @@
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    projects: ['<rootDir>/apps/app1/jest-isolated.config.js', '<rootDir>/libs/user/jest-isolated.config.js'],
-};
diff --git a/examples/example-app-monorepo/jest-isolated.config.ts b/examples/example-app-monorepo/jest-isolated.config.ts
new file mode 100644
index 0000000000..41314359b8
--- /dev/null
+++ b/examples/example-app-monorepo/jest-isolated.config.ts
@@ -0,0 +1,5 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
+    projects: ['<rootDir>/apps/app1/jest-isolated.config.ts', '<rootDir>/libs/user/jest-isolated.config.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/jest.config.js b/examples/example-app-monorepo/jest.config.js
deleted file mode 100644
index 1e1bdc5efb..0000000000
--- a/examples/example-app-monorepo/jest.config.js
+++ /dev/null
@@ -1,4 +0,0 @@
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    projects: ['<rootDir>/apps/app1', '<rootDir>/libs/user'],
-};
diff --git a/examples/example-app-monorepo/jest.config.ts b/examples/example-app-monorepo/jest.config.ts
new file mode 100644
index 0000000000..cc94c0f0fb
--- /dev/null
+++ b/examples/example-app-monorepo/jest.config.ts
@@ -0,0 +1,5 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
+    projects: ['<rootDir>/apps/app1', '<rootDir>/libs/user'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/libs/user/jest-esm-isolated.config.mjs b/examples/example-app-monorepo/libs/user/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-monorepo/libs/user/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-monorepo/libs/user/jest-esm-isolated.config.ts b/examples/example-app-monorepo/libs/user/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-monorepo/libs/user/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/libs/user/jest-esm.config.mjs b/examples/example-app-monorepo/libs/user/jest-esm.config.mjs
deleted file mode 100644
index f8f9fe3c20..0000000000
--- a/examples/example-app-monorepo/libs/user/jest-esm.config.mjs
+++ /dev/null
@@ -1,24 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  displayName: 'user-lib',
-  moduleNameMapper: {
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-monorepo/libs/user/jest-esm.config.ts b/examples/example-app-monorepo/libs/user/jest-esm.config.ts
new file mode 100644
index 0000000000..bc502bc14f
--- /dev/null
+++ b/examples/example-app-monorepo/libs/user/jest-esm.config.ts
@@ -0,0 +1,22 @@
+import ngPreset from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
+    ...ngPreset.defaultsESM,
+    displayName: 'user-lib',
+    moduleNameMapper: {
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/libs/user/jest-isolated.config.ts b/examples/example-app-monorepo/libs/user/jest-isolated.config.ts
new file mode 100644
index 0000000000..cfde54a067
--- /dev/null
+++ b/examples/example-app-monorepo/libs/user/jest-isolated.config.ts
@@ -0,0 +1,17 @@
+import presets from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|mjs|html|svg)$': [
+            'jest-preset-angular',
+            {
+                ...presets.defaultTransformerOptions,
+                isolatedModules: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/libs/user/jest.config.js b/examples/example-app-monorepo/libs/user/jest.config.ts
similarity index 53%
rename from examples/example-app-monorepo/libs/user/jest.config.js
rename to examples/example-app-monorepo/libs/user/jest.config.ts
index 6fbc3b25a8..fb921bc7a6 100644
--- a/examples/example-app-monorepo/libs/user/jest.config.js
+++ b/examples/example-app-monorepo/libs/user/jest.config.ts
@@ -1,6 +1,7 @@
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+export default {
     displayName: 'user-lib',
     preset: 'jest-preset-angular',
     setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-};
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-monorepo/libs/user/tsconfig.lib.json b/examples/example-app-monorepo/libs/user/tsconfig.lib.json
index 7e0d62a68d..b77b13c010 100644
--- a/examples/example-app-monorepo/libs/user/tsconfig.lib.json
+++ b/examples/example-app-monorepo/libs/user/tsconfig.lib.json
@@ -1,6 +1,6 @@
 /* To learn more about this file see: https://angular.io/config/tsconfig. */
 {
-  "extends": "../../tsconfig-base.json",
+  "extends": "../../tsconfig.json",
   "compilerOptions": {
     "outDir": "../../out-tsc/lib",
     "declaration": true,
diff --git a/examples/example-app-monorepo/libs/user/tsconfig.spec.json b/examples/example-app-monorepo/libs/user/tsconfig.spec.json
index 31927a64bd..40c21ee8af 100644
--- a/examples/example-app-monorepo/libs/user/tsconfig.spec.json
+++ b/examples/example-app-monorepo/libs/user/tsconfig.spec.json
@@ -1,6 +1,6 @@
 /* To learn more about this file see: https://angular.io/config/tsconfig. */
 {
-  "extends": "../../tsconfig-base.json",
+  "extends": "../../tsconfig.json",
   "compilerOptions": {
     "module": "CommonJS",
     "types": [
diff --git a/examples/example-app-monorepo/package.json b/examples/example-app-monorepo/package.json
index 41eac8e928..257d541630 100644
--- a/examples/example-app-monorepo/package.json
+++ b/examples/example-app-monorepo/package.json
@@ -6,9 +6,9 @@
     "start": "ng serve",
     "build": "ng build",
     "test": "jest --no-cache",
-    "test-isolated": "jest -c=jest-isolated.config.js --no-cache",
-    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.mjs --no-cache",
-    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.mjs --no-cache"
+    "test-isolated": "jest -c=jest-isolated.config.ts --no-cache",
+    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.ts --no-cache",
+    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.ts --no-cache"
   },
   "private": true,
   "dependencies": {
diff --git a/examples/example-app-monorepo/tsconfig-base.json b/examples/example-app-monorepo/tsconfig.json
similarity index 100%
rename from examples/example-app-monorepo/tsconfig-base.json
rename to examples/example-app-monorepo/tsconfig.json
diff --git a/examples/example-app-v16/jest-esm-isolated.config.mjs b/examples/example-app-v16/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-v16/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-v16/jest-esm-isolated.config.ts b/examples/example-app-v16/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-v16/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v16/jest-esm.config.mjs b/examples/example-app-v16/jest-esm.config.mjs
deleted file mode 100644
index c838df5dde..0000000000
--- a/examples/example-app-v16/jest-esm.config.mjs
+++ /dev/null
@@ -1,26 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-import { pathsToModuleNameMapper } from 'ts-jest';
-import tsconfig from './tsconfig.json' assert { type: 'json' };
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  moduleNameMapper: {
-    ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-v16/jest-esm.config.ts b/examples/example-app-v16/jest-esm.config.ts
new file mode 100644
index 0000000000..6d52a9f885
--- /dev/null
+++ b/examples/example-app-v16/jest-esm.config.ts
@@ -0,0 +1,24 @@
+import ngPreset from 'jest-preset-angular/presets';
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import tsconfig from './tsconfig.json';
+
+export default {
+    ...ngPreset.defaultsESM,
+    moduleNameMapper: {
+        ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v16/jest-isolated.config.js b/examples/example-app-v16/jest-isolated.config.js
deleted file mode 100644
index 19cc6d10ff..0000000000
--- a/examples/example-app-v16/jest-isolated.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
-
-const jestCfg = require('./jest.config');
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    ...jestCfg,
-    transform: {
-        '^.+\\.(ts|js|mjs|html|svg)$': [
-            'jest-preset-angular',
-            {
-                ...defaultTransformerOptions,
-                isolatedModules: true,
-            },
-        ],
-    },
-};
diff --git a/examples/example-app-monorepo/libs/user/jest-isolated.config.js b/examples/example-app-v16/jest-isolated.config.ts
similarity index 63%
rename from examples/example-app-monorepo/libs/user/jest-isolated.config.js
rename to examples/example-app-v16/jest-isolated.config.ts
index 19cc6d10ff..c90f9b152c 100644
--- a/examples/example-app-monorepo/libs/user/jest-isolated.config.js
+++ b/examples/example-app-v16/jest-isolated.config.ts
@@ -1,6 +1,6 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
+import presets from 'jest-preset-angular/presets';
 
-const jestCfg = require('./jest.config');
+import jestCfg from './jest.config';
 
 /** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
 module.exports = {
@@ -9,7 +9,7 @@ module.exports = {
         '^.+\\.(ts|js|mjs|html|svg)$': [
             'jest-preset-angular',
             {
-                ...defaultTransformerOptions,
+                ...presets.defaultTransformerOptions,
                 isolatedModules: true,
             },
         ],
diff --git a/examples/example-app-v16/jest.config.js b/examples/example-app-v16/jest.config.js
deleted file mode 100644
index 2c51a78ceb..0000000000
--- a/examples/example-app-v16/jest.config.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const { pathsToModuleNameMapper } = require('ts-jest');
-
-const { paths } = require('./tsconfig.json').compilerOptions;
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    preset: 'jest-preset-angular',
-    moduleNameMapper: pathsToModuleNameMapper(paths, { prefix: '<rootDir>' }),
-    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-};
diff --git a/examples/example-app-v16/jest.config.ts b/examples/example-app-v16/jest.config.ts
new file mode 100644
index 0000000000..35af6cf10e
--- /dev/null
+++ b/examples/example-app-v16/jest.config.ts
@@ -0,0 +1,9 @@
+import { pathsToModuleNameMapper, type JestConfigWithTsJest } from 'ts-jest';
+
+import { compilerOptions } from './tsconfig.json';
+
+export default {
+    preset: 'jest-preset-angular',
+    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
+    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v16/package.json b/examples/example-app-v16/package.json
index 5419117a57..d6d31bc7f5 100644
--- a/examples/example-app-v16/package.json
+++ b/examples/example-app-v16/package.json
@@ -6,9 +6,9 @@
     "start": "ng serve",
     "build": "ng build",
     "test": "jest --no-cache",
-    "test-isolated": "jest -c=jest-isolated.config.js --no-cache",
-    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.mjs --no-cache",
-    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.mjs --no-cache"
+    "test-isolated": "jest -c=jest-isolated.config.ts --no-cache",
+    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.ts --no-cache",
+    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.ts --no-cache"
   },
   "private": true,
   "dependencies": {
diff --git a/examples/example-app-v17/jest-esm-isolated.config.mjs b/examples/example-app-v17/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-v17/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-v17/jest-esm-isolated.config.ts b/examples/example-app-v17/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-v17/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v17/jest-esm.config.mjs b/examples/example-app-v17/jest-esm.config.mjs
deleted file mode 100644
index c838df5dde..0000000000
--- a/examples/example-app-v17/jest-esm.config.mjs
+++ /dev/null
@@ -1,26 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-import { pathsToModuleNameMapper } from 'ts-jest';
-import tsconfig from './tsconfig.json' assert { type: 'json' };
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  moduleNameMapper: {
-    ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-v17/jest-esm.config.ts b/examples/example-app-v17/jest-esm.config.ts
new file mode 100644
index 0000000000..6d52a9f885
--- /dev/null
+++ b/examples/example-app-v17/jest-esm.config.ts
@@ -0,0 +1,24 @@
+import ngPreset from 'jest-preset-angular/presets';
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import tsconfig from './tsconfig.json';
+
+export default {
+    ...ngPreset.defaultsESM,
+    moduleNameMapper: {
+        ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v17/jest-isolated.config.js b/examples/example-app-v17/jest-isolated.config.js
deleted file mode 100644
index 19cc6d10ff..0000000000
--- a/examples/example-app-v17/jest-isolated.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
-
-const jestCfg = require('./jest.config');
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    ...jestCfg,
-    transform: {
-        '^.+\\.(ts|js|mjs|html|svg)$': [
-            'jest-preset-angular',
-            {
-                ...defaultTransformerOptions,
-                isolatedModules: true,
-            },
-        ],
-    },
-};
diff --git a/examples/example-app-v17/jest-isolated.config.ts b/examples/example-app-v17/jest-isolated.config.ts
new file mode 100644
index 0000000000..cfde54a067
--- /dev/null
+++ b/examples/example-app-v17/jest-isolated.config.ts
@@ -0,0 +1,17 @@
+import presets from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|mjs|html|svg)$': [
+            'jest-preset-angular',
+            {
+                ...presets.defaultTransformerOptions,
+                isolatedModules: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v17/jest.config.js b/examples/example-app-v17/jest.config.js
deleted file mode 100644
index 2c51a78ceb..0000000000
--- a/examples/example-app-v17/jest.config.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const { pathsToModuleNameMapper } = require('ts-jest');
-
-const { paths } = require('./tsconfig.json').compilerOptions;
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    preset: 'jest-preset-angular',
-    moduleNameMapper: pathsToModuleNameMapper(paths, { prefix: '<rootDir>' }),
-    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-};
diff --git a/examples/example-app-v17/jest.config.ts b/examples/example-app-v17/jest.config.ts
new file mode 100644
index 0000000000..5e8ab9cb78
--- /dev/null
+++ b/examples/example-app-v17/jest.config.ts
@@ -0,0 +1,9 @@
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import { compilerOptions } from './tsconfig.json';
+
+export default {
+    preset: 'jest-preset-angular',
+    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
+    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v17/package.json b/examples/example-app-v17/package.json
index e70176994f..7b5de52f30 100644
--- a/examples/example-app-v17/package.json
+++ b/examples/example-app-v17/package.json
@@ -6,9 +6,9 @@
     "start": "ng serve",
     "build": "ng build",
     "test": "jest --no-cache",
-    "test-isolated": "jest -c=jest-isolated.config.js --no-cache",
-    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.mjs --no-cache",
-    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.mjs --no-cache"
+    "test-isolated": "jest -c=jest-isolated.config.ts --no-cache",
+    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.ts --no-cache",
+    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.ts --no-cache"
   },
   "private": true,
   "dependencies": {
diff --git a/examples/example-app-v18/jest-esm-isolated.config.mjs b/examples/example-app-v18/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-v18/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-v18/jest-esm-isolated.config.ts b/examples/example-app-v18/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-v18/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v18/jest-esm.config.mjs b/examples/example-app-v18/jest-esm.config.mjs
deleted file mode 100644
index c838df5dde..0000000000
--- a/examples/example-app-v18/jest-esm.config.mjs
+++ /dev/null
@@ -1,26 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-import { pathsToModuleNameMapper } from 'ts-jest';
-import tsconfig from './tsconfig.json' assert { type: 'json' };
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  moduleNameMapper: {
-    ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-v18/jest-esm.config.ts b/examples/example-app-v18/jest-esm.config.ts
new file mode 100644
index 0000000000..6d52a9f885
--- /dev/null
+++ b/examples/example-app-v18/jest-esm.config.ts
@@ -0,0 +1,24 @@
+import ngPreset from 'jest-preset-angular/presets';
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import tsconfig from './tsconfig.json';
+
+export default {
+    ...ngPreset.defaultsESM,
+    moduleNameMapper: {
+        ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v18/jest-isolated.config.js b/examples/example-app-v18/jest-isolated.config.js
deleted file mode 100644
index 19cc6d10ff..0000000000
--- a/examples/example-app-v18/jest-isolated.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
-
-const jestCfg = require('./jest.config');
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    ...jestCfg,
-    transform: {
-        '^.+\\.(ts|js|mjs|html|svg)$': [
-            'jest-preset-angular',
-            {
-                ...defaultTransformerOptions,
-                isolatedModules: true,
-            },
-        ],
-    },
-};
diff --git a/examples/example-app-v18/jest-isolated.config.ts b/examples/example-app-v18/jest-isolated.config.ts
new file mode 100644
index 0000000000..cfde54a067
--- /dev/null
+++ b/examples/example-app-v18/jest-isolated.config.ts
@@ -0,0 +1,17 @@
+import presets from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|mjs|html|svg)$': [
+            'jest-preset-angular',
+            {
+                ...presets.defaultTransformerOptions,
+                isolatedModules: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v18/jest.config.js b/examples/example-app-v18/jest.config.js
deleted file mode 100644
index 2c51a78ceb..0000000000
--- a/examples/example-app-v18/jest.config.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const { pathsToModuleNameMapper } = require('ts-jest');
-
-const { paths } = require('./tsconfig.json').compilerOptions;
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    preset: 'jest-preset-angular',
-    moduleNameMapper: pathsToModuleNameMapper(paths, { prefix: '<rootDir>' }),
-    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-};
diff --git a/examples/example-app-v18/jest.config.ts b/examples/example-app-v18/jest.config.ts
new file mode 100644
index 0000000000..5e8ab9cb78
--- /dev/null
+++ b/examples/example-app-v18/jest.config.ts
@@ -0,0 +1,9 @@
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import { compilerOptions } from './tsconfig.json';
+
+export default {
+    preset: 'jest-preset-angular',
+    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
+    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-v18/package.json b/examples/example-app-v18/package.json
index 10992ca02d..b523cac7a2 100644
--- a/examples/example-app-v18/package.json
+++ b/examples/example-app-v18/package.json
@@ -6,9 +6,9 @@
     "start": "ng serve",
     "build": "ng build",
     "test": "jest --no-cache",
-    "test-isolated": "jest -c=jest-isolated.config.js --no-cache",
-    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.mjs --no-cache",
-    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.mjs --no-cache"
+    "test-isolated": "jest -c=jest-isolated.config.ts --no-cache",
+    "test-esm": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm.config.ts --no-cache",
+    "test-esm-isolated": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.ts --no-cache"
   },
   "private": true,
   "dependencies": {
diff --git a/examples/example-app-yarn-workspace/package.json b/examples/example-app-yarn-workspace/package.json
index af9e234fac..8122b9b244 100644
--- a/examples/example-app-yarn-workspace/package.json
+++ b/examples/example-app-yarn-workspace/package.json
@@ -1,6 +1,6 @@
 {
   "name": "example-app-yarn-workspace",
-  "version": "17.0.0",
+  "version": "18.0.0",
   "workspaces": {
     "packages": [
       "packages/*"
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest-esm-isolated.config.mjs b/examples/example-app-yarn-workspace/packages/angular-app/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-yarn-workspace/packages/angular-app/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest-esm-isolated.config.ts b/examples/example-app-yarn-workspace/packages/angular-app/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/angular-app/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest-esm.config.mjs b/examples/example-app-yarn-workspace/packages/angular-app/jest-esm.config.mjs
deleted file mode 100644
index 08d7d9b975..0000000000
--- a/examples/example-app-yarn-workspace/packages/angular-app/jest-esm.config.mjs
+++ /dev/null
@@ -1,26 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-import { pathsToModuleNameMapper } from 'ts-jest';
-import tsconfig from './tsconfig.json' assert { type: 'json' };
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  moduleNameMapper: {
-    ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest-esm.config.ts b/examples/example-app-yarn-workspace/packages/angular-app/jest-esm.config.ts
new file mode 100644
index 0000000000..95996172a4
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/angular-app/jest-esm.config.ts
@@ -0,0 +1,24 @@
+import ngPreset from 'jest-preset-angular/presets';
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import tsconfig from './tsconfig.json';
+
+export default {
+    ...ngPreset.defaultsESM,
+    moduleNameMapper: {
+        ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest-isolated.config.js b/examples/example-app-yarn-workspace/packages/angular-app/jest-isolated.config.js
deleted file mode 100644
index 19cc6d10ff..0000000000
--- a/examples/example-app-yarn-workspace/packages/angular-app/jest-isolated.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
-
-const jestCfg = require('./jest.config');
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    ...jestCfg,
-    transform: {
-        '^.+\\.(ts|js|mjs|html|svg)$': [
-            'jest-preset-angular',
-            {
-                ...defaultTransformerOptions,
-                isolatedModules: true,
-            },
-        ],
-    },
-};
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest-isolated.config.ts b/examples/example-app-yarn-workspace/packages/angular-app/jest-isolated.config.ts
new file mode 100644
index 0000000000..cfde54a067
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/angular-app/jest-isolated.config.ts
@@ -0,0 +1,17 @@
+import presets from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|mjs|html|svg)$': [
+            'jest-preset-angular',
+            {
+                ...presets.defaultTransformerOptions,
+                isolatedModules: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest.config.js b/examples/example-app-yarn-workspace/packages/angular-app/jest.config.js
deleted file mode 100644
index 2c51a78ceb..0000000000
--- a/examples/example-app-yarn-workspace/packages/angular-app/jest.config.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const { pathsToModuleNameMapper } = require('ts-jest');
-
-const { paths } = require('./tsconfig.json').compilerOptions;
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    preset: 'jest-preset-angular',
-    moduleNameMapper: pathsToModuleNameMapper(paths, { prefix: '<rootDir>' }),
-    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-};
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/jest.config.ts b/examples/example-app-yarn-workspace/packages/angular-app/jest.config.ts
new file mode 100644
index 0000000000..5e8ab9cb78
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/angular-app/jest.config.ts
@@ -0,0 +1,9 @@
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import { compilerOptions } from './tsconfig.json';
+
+export default {
+    preset: 'jest-preset-angular',
+    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
+    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/package.json b/examples/example-app-yarn-workspace/packages/angular-app/package.json
index fe0c1ecdf5..5c9ccc2ce1 100644
--- a/examples/example-app-yarn-workspace/packages/angular-app/package.json
+++ b/examples/example-app-yarn-workspace/packages/angular-app/package.json
@@ -7,9 +7,9 @@
     "start": "ng serve",
     "build": "ng build",
     "test": "jest --no-cache",
-    "test-isolated": "jest -c=jest-isolated.config.js --no-cache",
-    "test-esm": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm.config.mjs --no-cache",
-    "test-esm-isolated": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.mjs --no-cache"
+    "test-isolated": "jest -c=jest-isolated.config.ts --no-cache",
+    "test-esm": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm.config.ts --no-cache",
+    "test-esm-isolated": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.ts --no-cache"
   },
   "dependencies": {
     "@angular/animations": "^18.2.7",
diff --git a/examples/example-app-yarn-workspace/packages/angular-app/tsconfig.json b/examples/example-app-yarn-workspace/packages/angular-app/tsconfig.json
index 9395c55983..2bed27e807 100644
--- a/examples/example-app-yarn-workspace/packages/angular-app/tsconfig.json
+++ b/examples/example-app-yarn-workspace/packages/angular-app/tsconfig.json
@@ -14,6 +14,7 @@
     "moduleResolution": "node",
     "importHelpers": true,
     "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "target": "ES2022",
     "module": "ES2022",
diff --git a/examples/example-app-yarn-workspace/packages/user/jest-esm-isolated.config.mjs b/examples/example-app-yarn-workspace/packages/user/jest-esm-isolated.config.mjs
deleted file mode 100644
index c0696cc27b..0000000000
--- a/examples/example-app-yarn-workspace/packages/user/jest-esm-isolated.config.mjs
+++ /dev/null
@@ -1,19 +0,0 @@
-import jestCfg from './jest-esm.config.mjs';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestIsolatedCfg = {
-  ...jestCfg,
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        isolatedModules: true,
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestIsolatedCfg;
diff --git a/examples/example-app-yarn-workspace/packages/user/jest-esm-isolated.config.ts b/examples/example-app-yarn-workspace/packages/user/jest-esm-isolated.config.ts
new file mode 100644
index 0000000000..1a63e299fd
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/user/jest-esm-isolated.config.ts
@@ -0,0 +1,18 @@
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest-esm.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                isolatedModules: true,
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/user/jest-esm.config.mjs b/examples/example-app-yarn-workspace/packages/user/jest-esm.config.mjs
deleted file mode 100644
index dcc5d14ae0..0000000000
--- a/examples/example-app-yarn-workspace/packages/user/jest-esm.config.mjs
+++ /dev/null
@@ -1,23 +0,0 @@
-import ngPreset from 'jest-preset-angular/presets/index.js';
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-const jestConfig = {
-  ...ngPreset.defaultsESM,
-  moduleNameMapper: {
-    tslib: 'tslib/tslib.es6.js',
-    rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
-  },
-  setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
-  transform: {
-    '^.+\\.(ts|js|html|svg)$': [
-      'jest-preset-angular',
-      {
-        tsconfig: '<rootDir>/tsconfig-esm.spec.json',
-        stringifyContentPathRegex: '\\.(html|svg)$',
-        useESM: true,
-      },
-    ],
-  },
-};
-
-export default jestConfig;
diff --git a/examples/example-app-yarn-workspace/packages/user/jest-esm.config.ts b/examples/example-app-yarn-workspace/packages/user/jest-esm.config.ts
new file mode 100644
index 0000000000..95996172a4
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/user/jest-esm.config.ts
@@ -0,0 +1,24 @@
+import ngPreset from 'jest-preset-angular/presets';
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import tsconfig from './tsconfig.json';
+
+export default {
+    ...ngPreset.defaultsESM,
+    moduleNameMapper: {
+        ...pathsToModuleNameMapper(tsconfig.compilerOptions.paths, { prefix: '<rootDir>' }),
+        tslib: 'tslib/tslib.es6.js',
+        rxjs: '<rootDir>/../../node_modules/rxjs/dist/bundles/rxjs.umd.js',
+    },
+    setupFilesAfterEnv: ['<rootDir>/setup-jest-esm.ts'],
+    transform: {
+        '^.+\\.(ts|js|html|svg)$': [
+            'jest-preset-angular',
+            {
+                tsconfig: '<rootDir>/tsconfig-esm.spec.json',
+                stringifyContentPathRegex: '\\.(html|svg)$',
+                useESM: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/user/jest-isolated.config.js b/examples/example-app-yarn-workspace/packages/user/jest-isolated.config.js
deleted file mode 100644
index 19cc6d10ff..0000000000
--- a/examples/example-app-yarn-workspace/packages/user/jest-isolated.config.js
+++ /dev/null
@@ -1,17 +0,0 @@
-const { defaultTransformerOptions } = require('jest-preset-angular/presets');
-
-const jestCfg = require('./jest.config');
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    ...jestCfg,
-    transform: {
-        '^.+\\.(ts|js|mjs|html|svg)$': [
-            'jest-preset-angular',
-            {
-                ...defaultTransformerOptions,
-                isolatedModules: true,
-            },
-        ],
-    },
-};
diff --git a/examples/example-app-yarn-workspace/packages/user/jest-isolated.config.ts b/examples/example-app-yarn-workspace/packages/user/jest-isolated.config.ts
new file mode 100644
index 0000000000..cfde54a067
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/user/jest-isolated.config.ts
@@ -0,0 +1,17 @@
+import presets from 'jest-preset-angular/presets';
+import type { JestConfigWithTsJest } from 'ts-jest';
+
+import jestCfg from './jest.config';
+
+export default {
+    ...jestCfg,
+    transform: {
+        '^.+\\.(ts|js|mjs|html|svg)$': [
+            'jest-preset-angular',
+            {
+                ...presets.defaultTransformerOptions,
+                isolatedModules: true,
+            },
+        ],
+    },
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/user/jest.config.js b/examples/example-app-yarn-workspace/packages/user/jest.config.js
deleted file mode 100644
index 2c51a78ceb..0000000000
--- a/examples/example-app-yarn-workspace/packages/user/jest.config.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const { pathsToModuleNameMapper } = require('ts-jest');
-
-const { paths } = require('./tsconfig.json').compilerOptions;
-
-/** @type {import('ts-jest/dist/types').JestConfigWithTsJest} */
-module.exports = {
-    preset: 'jest-preset-angular',
-    moduleNameMapper: pathsToModuleNameMapper(paths, { prefix: '<rootDir>' }),
-    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
-};
diff --git a/examples/example-app-yarn-workspace/packages/user/jest.config.ts b/examples/example-app-yarn-workspace/packages/user/jest.config.ts
new file mode 100644
index 0000000000..5e8ab9cb78
--- /dev/null
+++ b/examples/example-app-yarn-workspace/packages/user/jest.config.ts
@@ -0,0 +1,9 @@
+import { type JestConfigWithTsJest, pathsToModuleNameMapper } from 'ts-jest';
+
+import { compilerOptions } from './tsconfig.json';
+
+export default {
+    preset: 'jest-preset-angular',
+    moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>' }),
+    setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
+} satisfies JestConfigWithTsJest;
diff --git a/examples/example-app-yarn-workspace/packages/user/package.json b/examples/example-app-yarn-workspace/packages/user/package.json
index 531b0e7329..f727fee552 100644
--- a/examples/example-app-yarn-workspace/packages/user/package.json
+++ b/examples/example-app-yarn-workspace/packages/user/package.json
@@ -4,9 +4,9 @@
   "private": true,
   "scripts": {
     "test": "jest --no-cache",
-    "test-isolated": "jest -c=jest-isolated.config.js --no-cache",
-    "test-esm": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm.config.mjs --no-cache",
-    "test-esm-isolated": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.mjs --no-cache"
+    "test-isolated": "jest -c=jest-isolated.config.ts --no-cache",
+    "test-esm": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm.config.ts --no-cache",
+    "test-esm-isolated": "node --experimental-vm-modules --no-warnings ../../node_modules/jest/bin/jest.js -c=jest-esm-isolated.config.ts --no-cache"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "^18.2.7",
diff --git a/examples/example-app-yarn-workspace/packages/user/tsconfig.json b/examples/example-app-yarn-workspace/packages/user/tsconfig.json
index 1a6203891d..8306a847f6 100644
--- a/examples/example-app-yarn-workspace/packages/user/tsconfig.json
+++ b/examples/example-app-yarn-workspace/packages/user/tsconfig.json
@@ -10,10 +10,13 @@
     "experimentalDecorators": true,
     "moduleResolution": "node",
     "importHelpers": true,
-    "target": "es2015",
-    "module": "es2020",
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "target": "ES2022",
+    "module": "ES2022",
     "strict": true,
-    "lib": ["es2018", "dom"],
+    "lib": ["ES2022", "dom"],
     "paths": {
       "@shared/*": ["src/app/shared/*"]
     }