diff --git a/packages/angular/cli/src/utilities/package-metadata.ts b/packages/angular/cli/src/utilities/package-metadata.ts
index fd31000f989a..05a739e898ae 100644
--- a/packages/angular/cli/src/utilities/package-metadata.ts
+++ b/packages/angular/cli/src/utilities/package-metadata.ts
@@ -52,9 +52,7 @@ export interface PackageManifest extends Manifest, NgPackageManifestProperties {
   peerDependenciesMeta?: Record<string, { optional?: boolean }>;
 }
 
-interface PackageManagerOptions extends Record<string, unknown> {
-  forceAuth?: Record<string, unknown>;
-}
+type PackageManagerOptions = Record<string, unknown>;
 
 let npmrc: PackageManagerOptions;
 const npmPackageJsonCache = new Map<string, Promise<Partial<NpmRepositoryPackageJson>>>();
@@ -175,19 +173,6 @@ function normalizeOptions(
     }
 
     switch (key) {
-      // Unless auth options are scope with the registry url it appears that npm-registry-fetch ignores them,
-      // even though they are documented.
-      // https://github.com/npm/npm-registry-fetch/blob/8954f61d8d703e5eb7f3d93c9b40488f8b1b62ac/README.md
-      // https://github.com/npm/npm-registry-fetch/blob/8954f61d8d703e5eb7f3d93c9b40488f8b1b62ac/auth.js#L45-L91
-      case '_authToken':
-      case 'token':
-      case 'username':
-      case 'password':
-      case '_auth':
-      case 'auth':
-        options['forceAuth'] ??= {};
-        options['forceAuth'][key] = substitutedValue;
-        break;
       case 'noproxy':
       case 'no-proxy':
         options['noProxy'] = substitutedValue;
diff --git a/tests/e2e/tests/commands/add/secure-registry.ts b/tests/e2e/tests/commands/add/secure-registry.ts
index 4a640607f8be..e585444b02e4 100644
--- a/tests/e2e/tests/commands/add/secure-registry.ts
+++ b/tests/e2e/tests/commands/add/secure-registry.ts
@@ -1,5 +1,5 @@
-import { expectFileNotToExist, expectFileToExist, rimraf } from '../../../utils/fs';
-import { getActivePackageManager, installWorkspacePackages } from '../../../utils/packages';
+import { expectFileNotToExist, expectFileToExist } from '../../../utils/fs';
+import { installWorkspacePackages } from '../../../utils/packages';
 import { git, ng } from '../../../utils/process';
 import { createNpmConfigForAuthentication } from '../../../utils/registry';
 import { expectToFail } from '../../../utils/utils';
@@ -9,37 +9,17 @@ export default async function () {
   try {
     // The environment variable has priority over the .npmrc
     delete process.env['NPM_CONFIG_REGISTRY'];
-    const packageManager = getActivePackageManager();
-    const supportsUnscopedAuth = packageManager === 'yarn';
     const command = ['add', '@angular/pwa', '--skip-confirmation'];
 
-    // Works with unscoped registry authentication details
-    if (supportsUnscopedAuth) {
-      // Some package managers such as Bun and NPM do not support unscoped auth.
-      await createNpmConfigForAuthentication(false);
-
-      await expectFileNotToExist('public/manifest.webmanifest');
-
-      await ng(...command);
-      await expectFileToExist('public/manifest.webmanifest');
-      await git('clean', '-dxf');
-    }
-
     // Works with scoped registry authentication details
     await expectFileNotToExist('public/manifest.webmanifest');
 
-    await createNpmConfigForAuthentication(true);
+    await createNpmConfigForAuthentication();
     await ng(...command);
     await expectFileToExist('public/manifest.webmanifest');
     await git('clean', '-dxf');
 
     // Invalid authentication token
-    if (supportsUnscopedAuth) {
-      // Some package managers such as Bun and NPM do not support unscoped auth.
-      await createNpmConfigForAuthentication(false, true);
-      await expectToFail(() => ng(...command));
-    }
-
     await createNpmConfigForAuthentication(true, true);
     await expectToFail(() => ng(...command));
   } finally {
diff --git a/tests/e2e/tests/update/update-secure-registry.ts b/tests/e2e/tests/update/update-secure-registry.ts
index b52d311a622f..3c0a9d468e44 100644
--- a/tests/e2e/tests/update/update-secure-registry.ts
+++ b/tests/e2e/tests/update/update-secure-registry.ts
@@ -6,9 +6,6 @@ import { getActivePackageManager } from '../../utils/packages';
 import assert from 'node:assert';
 
 export default async function () {
-  const packageManager = getActivePackageManager();
-  const supportsUnscopedAuth = packageManager === 'yarn';
-
   // The environment variable has priority over the .npmrc
   delete process.env['NPM_CONFIG_REGISTRY'];
   const worksMessage = 'We analyzed your package.json';
@@ -20,15 +17,7 @@ export default async function () {
 
   // Valid authentication token
 
-  if (supportsUnscopedAuth) {
-    await createNpmConfigForAuthentication(false);
-    const { stdout: stdout1 } = await ng('update', ...extraArgs);
-    if (!stdout1.includes(worksMessage)) {
-      throw new Error(`Expected stdout to contain "${worksMessage}"`);
-    }
-  }
-
-  await createNpmConfigForAuthentication(true);
+  await createNpmConfigForAuthentication();
   const { stdout: stdout2 } = await ng('update', ...extraArgs);
   if (!stdout2.includes(worksMessage)) {
     throw new Error(`Expected stdout to contain "${worksMessage}"`);
@@ -36,11 +25,6 @@ export default async function () {
 
   // Invalid authentication token
 
-  if (supportsUnscopedAuth) {
-    await createNpmConfigForAuthentication(false, true);
-    await expectToFail(() => ng('update', ...extraArgs));
-  }
-
   await createNpmConfigForAuthentication(true, true);
   await expectToFail(() => ng('update', ...extraArgs));
 
diff --git a/tests/e2e/utils/registry.ts b/tests/e2e/utils/registry.ts
index fd557c116120..d8d75b566fb9 100644
--- a/tests/e2e/utils/registry.ts
+++ b/tests/e2e/utils/registry.ts
@@ -63,7 +63,7 @@ export async function createNpmConfigForAuthentication(
    * _auth="dGVzdGluZzpzM2NyZXQ="`
    * ```
    */
-  scopedAuthentication: boolean,
+  scopedAuthentication = true,
   /** When true, an incorrect token is used. Use this to validate authentication failures. */
   invalidToken = false,
 ): Promise<void> {