diff --git a/.circleci/config.yml b/.circleci/config.yml
index 62e0e1fda433..b8b7eaab2e9a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -254,6 +254,12 @@ jobs:
       - custom_attach_workspace
       - run: yarn build
 
+  build-bazel-e2e:
+    executor: action-executor
+    steps:
+      - custom_attach_workspace
+      - run: yarn bazel build //tests/legacy-cli/...
+
   test:
     executor: test-executor
     resource_class: xlarge
@@ -379,6 +385,12 @@ workflows:
           requires:
             - build
 
+      # Compile the e2e tests with bazel to ensure the non-runtime typescript
+      # compilation completes succesfully.
+      - build-bazel-e2e:
+          requires:
+            - build
+
       # Windows jobs
       - e2e-cli-win:
           requires:
diff --git a/lib/BUILD.bazel b/lib/BUILD.bazel
new file mode 100644
index 000000000000..6f80a75580f2
--- /dev/null
+++ b/lib/BUILD.bazel
@@ -0,0 +1,12 @@
+load("//tools:defaults.bzl", "ts_library")
+
+ts_library(
+    name = "lib",
+    srcs = ["packages.ts"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//packages/angular_devkit/core",
+        "@npm//@types/node",
+        "@npm//typescript",
+    ],
+)
diff --git a/tests/legacy-cli/BUILD.bazel b/tests/legacy-cli/BUILD.bazel
new file mode 100644
index 000000000000..a2c76fbbe307
--- /dev/null
+++ b/tests/legacy-cli/BUILD.bazel
@@ -0,0 +1,25 @@
+load("//tools:defaults.bzl", "ts_library")
+
+ts_library(
+    name = "runner",
+    testonly = True,
+    srcs = glob(["**/*.ts"]),
+    data = [
+        "verdaccio.yaml",
+        "verdaccio_auth.yaml",
+    ],
+    deps = [
+        "//packages/angular_devkit/core",
+        "//packages/angular_devkit/core/node",
+        "//tests/legacy-cli/e2e/assets",
+        "//tests/legacy-cli/e2e/utils",
+        "@npm//@types/glob",
+        "@npm//@types/yargs-parser",
+        "@npm//ansi-colors",
+        "@npm//yargs-parser",
+
+        # Loaded dynamically at runtime, not compiletime deps
+        "//tests/legacy-cli/e2e/setup",
+        "//tests/legacy-cli/e2e/tests",
+    ],
+)
diff --git a/tests/legacy-cli/e2e/assets/BUILD.bazel b/tests/legacy-cli/e2e/assets/BUILD.bazel
new file mode 100644
index 000000000000..c5067a937896
--- /dev/null
+++ b/tests/legacy-cli/e2e/assets/BUILD.bazel
@@ -0,0 +1,11 @@
+load("//tools:defaults.bzl", "js_library")
+
+js_library(
+    name = "assets",
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "@npm//jasmine-spec-reporter",
+        "@npm//ts-node",
+    ],
+)
diff --git a/tests/legacy-cli/e2e/ng-snapshot/BUILD.bazel b/tests/legacy-cli/e2e/ng-snapshot/BUILD.bazel
new file mode 100644
index 000000000000..5a929766ca6f
--- /dev/null
+++ b/tests/legacy-cli/e2e/ng-snapshot/BUILD.bazel
@@ -0,0 +1,8 @@
+load("//tools:defaults.bzl", "ts_library")
+
+ts_library(
+    name = "ng-snapshot",
+    srcs = [],
+    data = ["package.json"],
+    visibility = ["//visibility:public"],
+)
diff --git a/tests/legacy-cli/e2e/setup/010-local-publish.ts b/tests/legacy-cli/e2e/setup/010-local-publish.ts
index 41fd0df79e50..f8902b7d65c0 100644
--- a/tests/legacy-cli/e2e/setup/010-local-publish.ts
+++ b/tests/legacy-cli/e2e/setup/010-local-publish.ts
@@ -3,7 +3,7 @@ import { execWithEnv, extractNpmEnv } from '../utils/process';
 import { isPrereleaseCli } from '../utils/project';
 
 export default async function () {
-  const testRegistry = getGlobalVariable('package-registry');
+  const testRegistry: string = getGlobalVariable('package-registry');
   await execWithEnv(
     'npm',
     [
diff --git a/tests/legacy-cli/e2e/setup/100-global-cli.ts b/tests/legacy-cli/e2e/setup/100-global-cli.ts
index ce96a91f258e..9f8f1e5f2c5b 100644
--- a/tests/legacy-cli/e2e/setup/100-global-cli.ts
+++ b/tests/legacy-cli/e2e/setup/100-global-cli.ts
@@ -7,7 +7,7 @@ export default async function () {
     return;
   }
 
-  const testRegistry = getGlobalVariable('package-registry');
+  const testRegistry: string = getGlobalVariable('package-registry');
 
   // Install global Angular CLI.
   await silentNpm('install', '--global', '@angular/cli', `--registry=${testRegistry}`);
diff --git a/tests/legacy-cli/e2e/setup/300-log-environment.ts b/tests/legacy-cli/e2e/setup/300-log-environment.ts
index c2d0e6a8edf9..7428a763b9e9 100644
--- a/tests/legacy-cli/e2e/setup/300-log-environment.ts
+++ b/tests/legacy-cli/e2e/setup/300-log-environment.ts
@@ -10,7 +10,7 @@ export default async function () {
       return;
     }
 
-    console.log(`  ${envName}: ${process.env[envName].replace(/[\n\r]+/g, '\n        ')}`);
+    console.log(`  ${envName}: ${process.env[envName]!.replace(/[\n\r]+/g, '\n        ')}`);
   });
 
   await node('--version');
diff --git a/tests/legacy-cli/e2e/setup/500-create-project.ts b/tests/legacy-cli/e2e/setup/500-create-project.ts
index 5b0319cf2941..cfe623ce50f4 100644
--- a/tests/legacy-cli/e2e/setup/500-create-project.ts
+++ b/tests/legacy-cli/e2e/setup/500-create-project.ts
@@ -17,12 +17,10 @@ export default async function () {
     process.chdir(argv.reuse);
     await gitClean();
   } else {
-    const extraArgs = [];
-
     // Ensure local test registry is used when outside a project
     await setNPMConfigRegistry(true);
 
-    await ng('new', 'test-project', '--skip-install', ...extraArgs);
+    await ng('new', 'test-project', '--skip-install');
     await expectFileToExist(join(process.cwd(), 'test-project'));
     process.chdir('./test-project');
 
diff --git a/tests/legacy-cli/e2e/setup/BUILD.bazel b/tests/legacy-cli/e2e/setup/BUILD.bazel
new file mode 100644
index 000000000000..ed2b51101e41
--- /dev/null
+++ b/tests/legacy-cli/e2e/setup/BUILD.bazel
@@ -0,0 +1,11 @@
+load("//tools:defaults.bzl", "ts_library")
+
+ts_library(
+    name = "setup",
+    testonly = True,
+    srcs = glob(["**/*.ts"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//tests/legacy-cli/e2e/utils",
+    ],
+)
diff --git a/tests/legacy-cli/e2e/tests/BUILD.bazel b/tests/legacy-cli/e2e/tests/BUILD.bazel
new file mode 100644
index 000000000000..4f01d7fc3887
--- /dev/null
+++ b/tests/legacy-cli/e2e/tests/BUILD.bazel
@@ -0,0 +1,20 @@
+load("//tools:defaults.bzl", "ts_library")
+
+ts_library(
+    name = "tests",
+    testonly = True,
+    srcs = glob(["**/*.ts"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//tests/legacy-cli/e2e/ng-snapshot",
+        "//tests/legacy-cli/e2e/utils",
+        "@npm//@types/express",
+        "@npm//@types/glob",
+        "@npm//@types/node-fetch",
+        "@npm//@types/semver",
+        "@npm//express",
+        "@npm//glob",
+        "@npm//node-fetch",
+        "@npm//semver",
+    ],
+)
diff --git a/tests/legacy-cli/e2e/tests/build/build-app-shell-with-schematic.ts b/tests/legacy-cli/e2e/tests/build/build-app-shell-with-schematic.ts
index 00f5cedf71c2..8a51686f72eb 100644
--- a/tests/legacy-cli/e2e/tests/build/build-app-shell-with-schematic.ts
+++ b/tests/legacy-cli/e2e/tests/build/build-app-shell-with-schematic.ts
@@ -12,11 +12,13 @@ export default async function () {
 
   const isSnapshotBuild = getGlobalVariable('argv')['ng-snapshots'];
   if (isSnapshotBuild) {
-    const packagesToInstall = [];
+    const packagesToInstall: string[] = [];
     await updateJsonFile('package.json', (packageJson) => {
       const dependencies = packageJson['dependencies'];
       // Iterate over all of the packages to update them to the snapshot version.
-      for (const [name, version] of Object.entries(snapshots.dependencies)) {
+      for (const [name, version] of Object.entries(
+        snapshots.dependencies as { [p: string]: string },
+      )) {
         if (name in dependencies && dependencies[name] !== version) {
           packagesToInstall.push(version);
         }
diff --git a/tests/legacy-cli/e2e/tests/build/platform-server.ts b/tests/legacy-cli/e2e/tests/build/platform-server.ts
index d5938c2efcc1..8f5f1627c061 100644
--- a/tests/legacy-cli/e2e/tests/build/platform-server.ts
+++ b/tests/legacy-cli/e2e/tests/build/platform-server.ts
@@ -12,11 +12,11 @@ export default async function () {
 
   const isSnapshotBuild = getGlobalVariable('argv')['ng-snapshots'];
   if (isSnapshotBuild) {
-    const packagesToInstall = [];
+    const packagesToInstall: string[] = [];
     await updateJsonFile('package.json', (packageJson) => {
       const dependencies = packageJson['dependencies'];
       // Iterate over all of the packages to update them to the snapshot version.
-      for (const [name, version] of Object.entries(snapshots.dependencies)) {
+      for (const [name, version] of Object.entries<string>(snapshots.dependencies)) {
         if (name in dependencies && dependencies[name] !== version) {
           packagesToInstall.push(version);
         }
diff --git a/tests/legacy-cli/e2e/tests/build/prod-build.ts b/tests/legacy-cli/e2e/tests/build/prod-build.ts
index 12131b113275..a7da45344d51 100644
--- a/tests/legacy-cli/e2e/tests/build/prod-build.ts
+++ b/tests/legacy-cli/e2e/tests/build/prod-build.ts
@@ -39,7 +39,7 @@ export default async function () {
   }
 
   const indexContent = await readFile('dist/test-project/index.html');
-  const mainPath = indexContent.match(/src="(main\.[0-9a-zA-Z]{0,32}\.js)"/)[1];
+  const mainPath = indexContent.match(/src="(main\.[0-9a-zA-Z]{0,32}\.js)"/)![1];
 
   // Content checks
   await expectFileToMatch(`dist/test-project/${mainPath}`, bootstrapRegExp);
diff --git a/tests/legacy-cli/e2e/tests/commands/add/add-pwa.ts b/tests/legacy-cli/e2e/tests/commands/add/add-pwa.ts
index 48dd9f29bc1c..d2115e2cfef2 100644
--- a/tests/legacy-cli/e2e/tests/commands/add/add-pwa.ts
+++ b/tests/legacy-cli/e2e/tests/commands/add/add-pwa.ts
@@ -53,7 +53,8 @@ export default async function () {
 
   // It should correctly generate assetGroups and include at least one URL in each group.
   const ngswJson = JSON.parse(await readFile(ngswPath));
-  const assetGroups = ngswJson.assetGroups.map(({ name, urls }) => ({
+  // @ts-ignore
+  const assetGroups: any[] = ngswJson.assetGroups.map(({ name, urls }) => ({
     name,
     urlCount: urls.length,
   }));
diff --git a/tests/legacy-cli/e2e/tests/i18n/ivy-localize-basehref.ts b/tests/legacy-cli/e2e/tests/i18n/ivy-localize-basehref.ts
index fb74452a5ae4..b55cffc22f8d 100644
--- a/tests/legacy-cli/e2e/tests/i18n/ivy-localize-basehref.ts
+++ b/tests/legacy-cli/e2e/tests/i18n/ivy-localize-basehref.ts
@@ -11,7 +11,7 @@ import { ng } from '../../utils/process';
 import { updateJsonFile } from '../../utils/project';
 import { externalServer, langTranslations, setupI18nConfig } from './setup';
 
-const baseHrefs = {
+const baseHrefs: { [l: string]: string } = {
   'en-US': '/en/',
   fr: '/fr-FR/',
   de: '',
@@ -59,7 +59,7 @@ export default async function () {
     await ng('e2e', `--configuration=${lang}`, '--port=0');
 
     // Execute Application E2E tests for a production build without dev server
-    const server = externalServer(outputPath, baseHrefs[lang] || '/');
+    const server = externalServer(outputPath, (baseHrefs[lang] as string) || '/');
     try {
       await ng(
         'e2e',
diff --git a/tests/legacy-cli/e2e/tests/i18n/ivy-localize-hashes.ts b/tests/legacy-cli/e2e/tests/i18n/ivy-localize-hashes.ts
index e370a1d209a4..166ca401b6b3 100644
--- a/tests/legacy-cli/e2e/tests/i18n/ivy-localize-hashes.ts
+++ b/tests/legacy-cli/e2e/tests/i18n/ivy-localize-hashes.ts
@@ -27,7 +27,7 @@ export default async function () {
         continue;
       }
 
-      hashes.set(`${lang}/${match.groups.name}`, match.groups.hash);
+      hashes.set(`${lang}/${match!.groups!.name}`, match!.groups!.hash);
     }
   }
 
@@ -48,12 +48,12 @@ export default async function () {
         continue;
       }
 
-      const id = `${lang}/${match.groups.name}`;
+      const id = `${lang}/${match!.groups!.name}`;
       const hash = hashes.get(id);
       if (!hash) {
         throw new Error('Unexpected output entry: ' + id);
       }
-      if (hash === match.groups.hash) {
+      if (hash === match!.groups!.hash) {
         throw new Error('Hash value did not change for entry: ' + id);
       }
 
diff --git a/tests/legacy-cli/e2e/tests/i18n/setup.ts b/tests/legacy-cli/e2e/tests/i18n/setup.ts
index bca561214027..d7954d6e5d59 100644
--- a/tests/legacy-cli/e2e/tests/i18n/setup.ts
+++ b/tests/legacy-cli/e2e/tests/i18n/setup.ts
@@ -98,12 +98,12 @@ export const formats = {
   'json': {
     ext: 'json',
     sourceCheck: '"locale": "en-US"',
-    replacements: [],
+    replacements: [] as RegExp[][],
   },
   'arb': {
     ext: 'arb',
     sourceCheck: '"@@locale": "en-US"',
-    replacements: [],
+    replacements: [] as RegExp[][],
   },
 };
 
@@ -248,7 +248,7 @@ export async function setupI18nConfig(format: keyof typeof formats = 'xlf') {
   for (const { lang, translationReplacements } of langTranslations) {
     if (lang != sourceLocale) {
       await copyFile(translationFile, `src/locale/messages.${lang}.${formats[format].ext}`);
-      for (const replacements of translationReplacements) {
+      for (const replacements of translationReplacements!) {
         await replaceInFile(
           `src/locale/messages.${lang}.${formats[format].ext}`,
           new RegExp(replacements[0], 'g'),
diff --git a/tests/legacy-cli/e2e/tests/misc/completion-prompt.ts b/tests/legacy-cli/e2e/tests/misc/completion-prompt.ts
index 983fc55f87e4..e4079c9ee7c3 100644
--- a/tests/legacy-cli/e2e/tests/misc/completion-prompt.ts
+++ b/tests/legacy-cli/e2e/tests/misc/completion-prompt.ts
@@ -408,7 +408,7 @@ source <(ng completion script)
 
       const localCliDir = path.join(projectDir, 'node_modules', '.bin');
       const localCliBinary = path.join(localCliDir, 'ng');
-      const pathDirs = process.env['PATH'].split(':');
+      const pathDirs = process.env['PATH']!.split(':');
       const pathEnvVar = [...pathDirs, localCliDir].join(':');
       const { stdout } = await execWithEnv(localCliBinary, ['version'], {
         ...DEFAULT_ENV,
diff --git a/tests/legacy-cli/e2e/tests/misc/e2e-host.ts b/tests/legacy-cli/e2e/tests/misc/e2e-host.ts
index 3ea2d6f72a31..6f5ba1e41332 100644
--- a/tests/legacy-cli/e2e/tests/misc/e2e-host.ts
+++ b/tests/legacy-cli/e2e/tests/misc/e2e-host.ts
@@ -3,7 +3,7 @@ import { killAllProcesses, ng } from '../../utils/process';
 import { updateJsonFile } from '../../utils/project';
 
 export default async function () {
-  const interfaces = [].concat.apply([], Object.values(os.networkInterfaces()));
+  const interfaces = Object.values(os.networkInterfaces()).flat() as os.NetworkInterfaceInfo[];
   let host = '';
   for (const { family, address, internal } of interfaces) {
     if (family === 'IPv4' && !internal) {
diff --git a/tests/legacy-cli/e2e/tests/misc/http-headers.ts b/tests/legacy-cli/e2e/tests/misc/http-headers.ts
index 23ebaaa2b5a0..8640d90dd781 100644
--- a/tests/legacy-cli/e2e/tests/misc/http-headers.ts
+++ b/tests/legacy-cli/e2e/tests/misc/http-headers.ts
@@ -24,7 +24,7 @@ export default async function () {
     };
   });
 
-  let errorMessage = null;
+  let errorMessage: string | null = null;
   try {
     await ng('e2e');
   } catch (error) {
diff --git a/tests/legacy-cli/e2e/tests/misc/npm-7.ts b/tests/legacy-cli/e2e/tests/misc/npm-7.ts
index 10356f173ce2..31cf1a3ad668 100644
--- a/tests/legacy-cli/e2e/tests/misc/npm-7.ts
+++ b/tests/legacy-cli/e2e/tests/misc/npm-7.ts
@@ -39,7 +39,7 @@ export default async function () {
 
   const currentDirectory = process.cwd();
 
-  const extraArgs = [];
+  const extraArgs: string[] = [];
   if (isPrereleaseCli()) {
     extraArgs.push('--next');
   }
diff --git a/tests/legacy-cli/e2e/tests/misc/public-host.ts b/tests/legacy-cli/e2e/tests/misc/public-host.ts
index cdebc93e4070..bf1e74448694 100644
--- a/tests/legacy-cli/e2e/tests/misc/public-host.ts
+++ b/tests/legacy-cli/e2e/tests/misc/public-host.ts
@@ -8,8 +8,8 @@ export default function () {
 
   const firstLocalIp = Object.values(os.networkInterfaces())
     .flat()
-    .filter((ni) => ni.family === 'IPv4' && !ni.internal)
-    .map((ni) => ni.address)
+    .filter((ni) => ni?.family === 'IPv4' && !ni?.internal)
+    .map((ni) => ni!.address)
     .shift();
   const publicHost = `${firstLocalIp}:4200`;
   const localAddress = `http://${publicHost}`;
diff --git a/tests/legacy-cli/e2e/tests/update/update-secure-registry.ts b/tests/legacy-cli/e2e/tests/update/update-secure-registry.ts
index f6f7621ffc9a..18ab56859984 100644
--- a/tests/legacy-cli/e2e/tests/update/update-secure-registry.ts
+++ b/tests/legacy-cli/e2e/tests/update/update-secure-registry.ts
@@ -8,7 +8,7 @@ export default async function () {
   delete process.env['NPM_CONFIG_REGISTRY'];
   const worksMessage = 'We analyzed your package.json';
 
-  const extraArgs = [];
+  const extraArgs: string[] = [];
   if (isPrereleaseCli()) {
     extraArgs.push('--next');
   }
diff --git a/tests/legacy-cli/e2e/utils/BUILD.bazel b/tests/legacy-cli/e2e/utils/BUILD.bazel
new file mode 100644
index 000000000000..ef84018e745a
--- /dev/null
+++ b/tests/legacy-cli/e2e/utils/BUILD.bazel
@@ -0,0 +1,25 @@
+load("//tools:defaults.bzl", "ts_library")
+
+ts_library(
+    name = "utils",
+    testonly = True,
+    srcs = glob(["**/*.ts"]),
+    visibility = ["//visibility:public"],
+    deps = [
+        "//lib",
+        "//tests/legacy-cli/e2e/ng-snapshot",
+        "@npm//@types/glob",
+        "@npm//@types/node-fetch",
+        "@npm//@types/semver",
+        "@npm//@types/yargs-parser",
+        "@npm//ansi-colors",
+        "@npm//glob",
+        "@npm//protractor",
+        "@npm//puppeteer",
+        "@npm//rxjs",
+        "@npm//semver",
+        "@npm//tree-kill",
+        "@npm//verdaccio",
+        "@npm//verdaccio-auth-memory",
+    ],
+)
diff --git a/tests/legacy-cli/e2e/utils/env.ts b/tests/legacy-cli/e2e/utils/env.ts
index 906f3de451b6..6202e1bb597b 100644
--- a/tests/legacy-cli/e2e/utils/env.ts
+++ b/tests/legacy-cli/e2e/utils/env.ts
@@ -4,9 +4,9 @@ export function setGlobalVariable(name: string, value: any) {
   global[name] = value;
 }
 
-export function getGlobalVariable(name: string): any {
+export function getGlobalVariable<T = any>(name: string): T {
   if (!(name in global)) {
     throw new Error(`Trying to access variable "${name}" but it's not defined.`);
   }
-  return global[name];
+  return global[name] as T;
 }
diff --git a/tests/legacy-cli/e2e/utils/fs.ts b/tests/legacy-cli/e2e/utils/fs.ts
index 69ddf92d944c..fd419b45683e 100644
--- a/tests/legacy-cli/e2e/utils/fs.ts
+++ b/tests/legacy-cli/e2e/utils/fs.ts
@@ -29,7 +29,7 @@ export function symlinkFile(from: string, to: string, type?: string): Promise<vo
   return fs.symlink(from, to, type);
 }
 
-export function createDir(path: string): Promise<string> {
+export function createDir(path: string): Promise<string | undefined> {
   return fs.mkdir(path, { recursive: true });
 }
 
diff --git a/tests/legacy-cli/e2e/utils/process.ts b/tests/legacy-cli/e2e/utils/process.ts
index f1f4608f591e..4960cee26bf6 100644
--- a/tests/legacy-cli/e2e/utils/process.ts
+++ b/tests/legacy-cli/e2e/utils/process.ts
@@ -10,7 +10,7 @@ import treeKill from 'tree-kill';
 interface ExecOptions {
   silent?: boolean;
   waitForMatch?: RegExp;
-  env?: { [varname: string]: string };
+  env?: NodeJS.ProcessEnv;
   stdin?: string;
   cwd?: string;
 }
@@ -61,7 +61,8 @@ function _exec(options: ExecOptions, cmd: string, args: string[]): Promise<Proce
   }
 
   const childProcess = child_process.spawn(cmd, args, spawnOptions);
-  childProcess.stdout.on('data', (data: Buffer) => {
+  // @ts-ignore
+  childProcess.stdout!.on('data', (data: Buffer) => {
     stdout += data.toString('utf-8');
     if (options.silent) {
       return;
@@ -72,7 +73,8 @@ function _exec(options: ExecOptions, cmd: string, args: string[]): Promise<Proce
       .filter((line) => line !== '')
       .forEach((line) => console.log('  ' + line));
   });
-  childProcess.stderr.on('data', (data: Buffer) => {
+  // @ts-ignore
+  childProcess.stderr!.on('data', (data: Buffer) => {
     stderr += data.toString('utf-8');
     if (options.silent) {
       return;
@@ -118,13 +120,15 @@ function _exec(options: ExecOptions, cmd: string, args: string[]): Promise<Proce
 
     if (options.waitForMatch) {
       const match = options.waitForMatch;
-      childProcess.stdout.on('data', (data: Buffer) => {
+      // @ts-ignore
+      childProcess.stdout!.on('data', (data: Buffer) => {
         if (data.toString().match(match)) {
           resolve({ stdout, stderr });
           matched = true;
         }
       });
-      childProcess.stderr.on('data', (data: Buffer) => {
+      // @ts-ignore
+      childProcess.stderr!.on('data', (data: Buffer) => {
         if (data.toString().match(match)) {
           resolve({ stdout, stderr });
           matched = true;
@@ -134,8 +138,8 @@ function _exec(options: ExecOptions, cmd: string, args: string[]): Promise<Proce
 
     // Provide input to stdin if given.
     if (options.stdin) {
-      childProcess.stdin.write(options.stdin);
-      childProcess.stdin.end();
+      childProcess.stdin!.write(options.stdin);
+      childProcess.stdin!.end();
     }
   });
 }
@@ -143,7 +147,7 @@ function _exec(options: ExecOptions, cmd: string, args: string[]): Promise<Proce
 export function extractNpmEnv() {
   return Object.keys(process.env)
     .filter((v) => NPM_CONFIG_RE.test(v))
-    .reduce(
+    .reduce<NodeJS.ProcessEnv>(
       (vars, n) => {
         vars[n] = process.env[n];
         return vars;
@@ -171,13 +175,15 @@ export function waitForAnyProcessOutputToMatch(
       new Promise((resolve) => {
         let stdout = '';
         let stderr = '';
-        childProcess.stdout.on('data', (data: Buffer) => {
+        // @ts-ignore
+        childProcess.stdout!.on('data', (data: Buffer) => {
           stdout += data.toString();
           if (data.toString().match(match)) {
             resolve({ stdout, stderr });
           }
         });
-        childProcess.stderr.on('data', (data: Buffer) => {
+        // @ts-ignore
+        childProcess.stderr!.on('data', (data: Buffer) => {
           stderr += data.toString();
           if (data.toString().match(match)) {
             resolve({ stdout, stderr });
@@ -216,19 +222,14 @@ export function silentExec(cmd: string, ...args: string[]) {
   return _exec({ silent: true }, cmd, args);
 }
 
-export function execWithEnv(
-  cmd: string,
-  args: string[],
-  env: { [varname: string]: string },
-  stdin?: string,
-) {
+export function execWithEnv(cmd: string, args: string[], env: NodeJS.ProcessEnv, stdin?: string) {
   return _exec({ env, stdin }, cmd, args);
 }
 
 export async function execAndCaptureError(
   cmd: string,
   args: string[],
-  env?: { [varname: string]: string },
+  env?: NodeJS.ProcessEnv,
   stdin?: string,
 ): Promise<Error> {
   try {
@@ -243,7 +244,7 @@ export function execAndWaitForOutputToMatch(
   cmd: string,
   args: string[],
   match: RegExp,
-  env?: { [varName: string]: string },
+  env?: NodeJS.ProcessEnv,
 ) {
   if (cmd === 'ng' && args[0] === 'serve') {
     // Accept matches up to 20 times after the initial match.
diff --git a/tests/legacy-cli/e2e/utils/project.ts b/tests/legacy-cli/e2e/utils/project.ts
index dc721c688efe..5843454e2254 100644
--- a/tests/legacy-cli/e2e/utils/project.ts
+++ b/tests/legacy-cli/e2e/utils/project.ts
@@ -1,6 +1,7 @@
 import * as fs from 'fs';
 import * as path from 'path';
 import { prerelease, SemVer } from 'semver';
+import yargsParser from 'yargs-parser';
 import { packages } from '../../../../lib/packages';
 import { getGlobalVariable } from './env';
 import { prependToFile, readFile, replaceInFile, writeFile } from './fs';
@@ -25,9 +26,8 @@ export function updateTsConfig(fn: (json: any) => any | void) {
 export function ngServe(...args: string[]) {
   return execAndWaitForOutputToMatch('ng', ['serve', ...args], / Compiled successfully./);
 }
-
-export async function prepareProjectForE2e(name) {
-  const argv: string[] = getGlobalVariable('argv');
+export async function prepareProjectForE2e(name: string) {
+  const argv: yargsParser.Arguments = getGlobalVariable('argv');
 
   await git('config', 'user.email', 'angular-core+e2e@google.com');
   await git('config', 'user.name', 'Angular CLI E2e');
@@ -88,7 +88,7 @@ export function useSha() {
     return updateJsonFile('package.json', (json) => {
       // Install over the project with snapshot builds.
       function replaceDependencies(key: string) {
-        const missingSnapshots = [];
+        const missingSnapshots: string[] = [];
         Object.keys(json[key] || {})
           .filter((name) => name.match(/^@angular\//))
           .forEach((name) => {
@@ -229,5 +229,5 @@ export async function useCIChrome(projectDir: string = ''): Promise<void> {
 export const NgCLIVersion = new SemVer(packages['@angular/cli'].version);
 
 export function isPrereleaseCli(): boolean {
-  return prerelease(NgCLIVersion)?.length > 0;
+  return (prerelease(NgCLIVersion)?.length ?? 0) > 0;
 }
diff --git a/tests/legacy-cli/e2e_runner.ts b/tests/legacy-cli/e2e_runner.ts
index 43bb286b0362..4d15654b45c3 100644
--- a/tests/legacy-cli/e2e_runner.ts
+++ b/tests/legacy-cli/e2e_runner.ts
@@ -70,7 +70,7 @@ function lastLogger() {
 }
 
 const testGlob = argv.glob || 'tests/**/*.ts';
-let currentFileName = null;
+let currentFileName = '';
 
 const e2eRoot = path.join(__dirname, 'e2e');
 const allSetups = glob.sync('setup/**/*.ts', { nodir: true, cwd: e2eRoot }).sort();
@@ -157,7 +157,7 @@ Promise.all([findFreePort(), findFreePort()]).then(async ([httpPort, httpsPort])
                 };
 
           let clean = true;
-          let previousDir = null;
+          let previousDir: string | null = null;
 
           return Promise.resolve()
             .then(() => printHeader(currentFileName, testIndex))
diff --git a/tools/defaults.bzl b/tools/defaults.bzl
index edee9bc5c1e1..8f0e7867f333 100644
--- a/tools/defaults.bzl
+++ b/tools/defaults.bzl
@@ -1,7 +1,7 @@
 """Re-export of some bazel rules with repository-wide defaults."""
 
 load("@npm//@bazel/concatjs/internal:build_defs.bzl", _ts_library = "ts_library_macro")
-load("@build_bazel_rules_nodejs//:index.bzl", "copy_to_bin", _pkg_npm = "pkg_npm")
+load("@build_bazel_rules_nodejs//:index.bzl", "copy_to_bin", _js_library = "js_library", _pkg_npm = "pkg_npm")
 load("@rules_pkg//:pkg.bzl", "pkg_tar")
 load("@npm//@angular/dev-infra-private/bazel:extract_js_module_output.bzl", "extract_js_module_output")
 load("@aspect_bazel_lib//lib:utils.bzl", "to_label")
@@ -50,6 +50,8 @@ def ts_library(
         **kwargs
     )
 
+js_library = _js_library
+
 def pkg_npm(name, pkg_deps = [], use_prodmode_output = False, **kwargs):
     """Override of pkg_npm to produce package outputs and version substitutions conventional to the angular-cli project.