diff --git a/packages/playwright-test/src/plugins/index.ts b/packages/playwright-test/src/plugins/index.ts
index 6f24e6b5dd..52cc4a9a45 100644
--- a/packages/playwright-test/src/plugins/index.ts
+++ b/packages/playwright-test/src/plugins/index.ts
@@ -15,11 +15,11 @@
  */
 
 import type { FullConfig, Suite } from '../../types/testReporter';
-import type { Multiplexer } from '../reporters/multiplexer';
+import type { InternalReporter } from '../reporters/internalReporter';
 
 export interface TestRunnerPlugin {
   name: string;
-  setup?(config: FullConfig, configDir: string, reporter: Multiplexer): Promise<void>;
+  setup?(config: FullConfig, configDir: string, reporter: InternalReporter): Promise<void>;
   babelPlugins?(): Promise<[string, any?][]>;
   begin?(suite: Suite): Promise<void>;
   end?(): Promise<void>;
diff --git a/packages/playwright-test/src/plugins/webServerPlugin.ts b/packages/playwright-test/src/plugins/webServerPlugin.ts
index 6d933f63d2..5582ef1aa2 100644
--- a/packages/playwright-test/src/plugins/webServerPlugin.ts
+++ b/packages/playwright-test/src/plugins/webServerPlugin.ts
@@ -23,7 +23,7 @@ import type { FullConfig } from '../../types/testReporter';
 import type { TestRunnerPlugin } from '.';
 import type { FullConfigInternal } from '../common/config';
 import { envWithoutExperimentalLoaderOptions } from '../util';
-import type { Multiplexer } from '../reporters/multiplexer';
+import type { InternalReporter } from '../reporters/internalReporter';
 
 
 export type WebServerPluginOptions = {
@@ -49,7 +49,7 @@ export class WebServerPlugin implements TestRunnerPlugin {
   private _processExitedPromise!: Promise<any>;
   private _options: WebServerPluginOptions;
   private _checkPortOnly: boolean;
-  private _reporter?: Multiplexer;
+  private _reporter?: InternalReporter;
   name = 'playwright:webserver';
 
   constructor(options: WebServerPluginOptions, checkPortOnly: boolean) {
@@ -57,7 +57,7 @@ export class WebServerPlugin implements TestRunnerPlugin {
     this._checkPortOnly = checkPortOnly;
   }
 
-  public async setup(config: FullConfig, configDir: string, reporter: Multiplexer) {
+  public async setup(config: FullConfig, configDir: string, reporter: InternalReporter) {
     this._reporter = reporter;
     this._isAvailable = getIsAvailableFunction(this._options.url, this._checkPortOnly, !!this._options.ignoreHTTPSErrors, this._reporter.onStdErr?.bind(this._reporter));
     this._options.cwd = this._options.cwd ? path.resolve(configDir, this._options.cwd) : configDir;
@@ -148,7 +148,7 @@ async function isPortUsed(port: number): Promise<boolean> {
   return await innerIsPortUsed('127.0.0.1') || await innerIsPortUsed('::1');
 }
 
-async function isURLAvailable(url: URL, ignoreHTTPSErrors: boolean, onStdErr: Multiplexer['onStdErr']) {
+async function isURLAvailable(url: URL, ignoreHTTPSErrors: boolean, onStdErr: InternalReporter['onStdErr']) {
   let statusCode = await httpStatusCode(url, ignoreHTTPSErrors, onStdErr);
   if (statusCode === 404 && url.pathname === '/') {
     const indexUrl = new URL(url);
@@ -158,7 +158,7 @@ async function isURLAvailable(url: URL, ignoreHTTPSErrors: boolean, onStdErr: Mu
   return statusCode >= 200 && statusCode < 404;
 }
 
-async function httpStatusCode(url: URL, ignoreHTTPSErrors: boolean, onStdErr: Multiplexer['onStdErr']): Promise<number> {
+async function httpStatusCode(url: URL, ignoreHTTPSErrors: boolean, onStdErr: InternalReporter['onStdErr']): Promise<number> {
   return new Promise(resolve => {
     debugWebServer(`HTTP GET: ${url}`);
     httpRequest({
@@ -191,7 +191,7 @@ async function waitFor(waitFn: () => Promise<boolean>, cancellationToken: { canc
   }
 }
 
-function getIsAvailableFunction(url: string, checkPortOnly: boolean, ignoreHTTPSErrors: boolean, onStdErr: Multiplexer['onStdErr']) {
+function getIsAvailableFunction(url: string, checkPortOnly: boolean, ignoreHTTPSErrors: boolean, onStdErr: InternalReporter['onStdErr']) {
   const urlObject = new URL(url);
   if (!checkPortOnly)
     return () => isURLAvailable(urlObject, ignoreHTTPSErrors, onStdErr);
diff --git a/packages/playwright-test/src/reporters/internalReporter.ts b/packages/playwright-test/src/reporters/internalReporter.ts
new file mode 100644
index 0000000000..efb400573d
--- /dev/null
+++ b/packages/playwright-test/src/reporters/internalReporter.ts
@@ -0,0 +1,121 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import type { FullConfig, TestCase, TestError, TestResult, FullResult, TestStep, Reporter } from '../../types/testReporter';
+import { Suite } from '../common/test';
+import type { FullConfigInternal } from '../common/config';
+import { addSnippetToError } from './base';
+import { Multiplexer } from './multiplexer';
+
+type StdIOChunk = {
+  chunk: string | Buffer;
+  test?: TestCase;
+  result?: TestResult;
+};
+
+export class InternalReporter {
+  private _multiplexer: Multiplexer;
+  private _deferred: { error?: TestError, stdout?: StdIOChunk, stderr?: StdIOChunk }[] | null = [];
+  private _config!: FullConfigInternal;
+
+  constructor(reporters: Reporter[]) {
+    this._multiplexer = new Multiplexer(reporters);
+  }
+
+  onConfigure(config: FullConfigInternal) {
+    this._config = config;
+  }
+
+  onBegin(config: FullConfig, suite: Suite) {
+    this._multiplexer.onBegin(config, suite);
+
+    const deferred = this._deferred!;
+    this._deferred = null;
+    for (const item of deferred) {
+      if (item.error)
+        this.onError(item.error);
+      if (item.stdout)
+        this.onStdOut(item.stdout.chunk, item.stdout.test, item.stdout.result);
+      if (item.stderr)
+        this.onStdErr(item.stderr.chunk, item.stderr.test, item.stderr.result);
+    }
+  }
+
+  onTestBegin(test: TestCase, result: TestResult) {
+    this._multiplexer.onTestBegin(test, result);
+  }
+
+  onStdOut(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
+    if (this._deferred) {
+      this._deferred.push({ stdout: { chunk, test, result } });
+      return;
+    }
+    this._multiplexer.onStdOut(chunk, test, result);
+  }
+
+  onStdErr(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
+    if (this._deferred) {
+      this._deferred.push({ stderr: { chunk, test, result } });
+      return;
+    }
+
+    this._multiplexer.onStdErr(chunk, test, result);
+  }
+
+  onTestEnd(test: TestCase, result: TestResult) {
+    this._addSnippetToTestErrors(test, result);
+    this._multiplexer.onTestEnd(test, result);
+  }
+
+  async onEnd() { }
+
+  async onExit(result: FullResult) {
+    if (this._deferred) {
+      // onBegin was not reported, emit it.
+      this.onBegin(this._config.config, new Suite('', 'root'));
+    }
+    await this._multiplexer.onEnd(result);
+    await this._multiplexer.onExit();
+  }
+
+  onError(error: TestError) {
+    if (this._deferred) {
+      this._deferred.push({ error });
+      return;
+    }
+    addSnippetToError(this._config.config, error);
+    this._multiplexer.onError(error);
+  }
+
+  onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
+    this._multiplexer.onStepBegin(test, result, step);
+  }
+
+  onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
+    this._addSnippetToStepError(test, step);
+    this._multiplexer.onStepEnd(test, result, step);
+  }
+
+  private _addSnippetToTestErrors(test: TestCase, result: TestResult) {
+    for (const error of result.errors)
+      addSnippetToError(this._config.config, error, test.location.file);
+  }
+
+  private _addSnippetToStepError(test: TestCase, step: TestStep) {
+    if (step.error)
+      addSnippetToError(this._config.config, step.error, test.location.file);
+  }
+}
diff --git a/packages/playwright-test/src/reporters/multiplexer.ts b/packages/playwright-test/src/reporters/multiplexer.ts
index 314f5a778f..2869af396c 100644
--- a/packages/playwright-test/src/reporters/multiplexer.ts
+++ b/packages/playwright-test/src/reporters/multiplexer.ts
@@ -15,47 +15,18 @@
  */
 
 import type { FullConfig, TestCase, TestError, TestResult, FullResult, TestStep, Reporter } from '../../types/testReporter';
-import { Suite } from '../common/test';
-import type { FullConfigInternal } from '../common/config';
-import { addSnippetToError } from './base';
+import type { Suite } from '../common/test';
 
-type StdIOChunk = {
-  chunk: string | Buffer;
-  test?: TestCase;
-  result?: TestResult;
-};
-
-export class Multiplexer {
+export class Multiplexer implements Reporter {
   private _reporters: Reporter[];
-  private _deferred: { error?: TestError, stdout?: StdIOChunk, stderr?: StdIOChunk }[] | null = [];
-  private _config!: FullConfigInternal;
 
   constructor(reporters: Reporter[]) {
     this._reporters = reporters;
   }
 
-  printsToStdio() {
-    return this._reporters.some(r => r.printsToStdio ? r.printsToStdio() : true);
-  }
-
-  onConfigure(config: FullConfigInternal) {
-    this._config = config;
-  }
-
   onBegin(config: FullConfig, suite: Suite) {
     for (const reporter of this._reporters)
       wrap(() => reporter.onBegin?.(config, suite));
-
-    const deferred = this._deferred!;
-    this._deferred = null;
-    for (const item of deferred) {
-      if (item.error)
-        this.onError(item.error);
-      if (item.stdout)
-        this.onStdOut(item.stdout.chunk, item.stdout.test, item.stdout.result);
-      if (item.stderr)
-        this.onStdErr(item.stderr.chunk, item.stderr.test, item.stderr.result);
-    }
   }
 
   onTestBegin(test: TestCase, result: TestResult) {
@@ -64,76 +35,52 @@ export class Multiplexer {
   }
 
   onStdOut(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
-    if (this._deferred) {
-      this._deferred.push({ stdout: { chunk, test, result } });
-      return;
-    }
     for (const reporter of this._reporters)
       wrap(() => reporter.onStdOut?.(chunk, test, result));
   }
 
   onStdErr(chunk: string | Buffer, test?: TestCase, result?: TestResult) {
-    if (this._deferred) {
-      this._deferred.push({ stderr: { chunk, test, result } });
-      return;
-    }
-
     for (const reporter of this._reporters)
       wrap(() => reporter.onStdErr?.(chunk, test, result));
   }
 
   onTestEnd(test: TestCase, result: TestResult) {
-    this._addSnippetToTestErrors(test, result);
     for (const reporter of this._reporters)
       wrap(() => reporter.onTestEnd?.(test, result));
   }
 
-  async onEnd() { }
-
-  async onExit(result: FullResult) {
-    if (this._deferred) {
-      // onBegin was not reported, emit it.
-      this.onBegin(this._config.config, new Suite('', 'root'));
-    }
-
+  async onEnd(result: FullResult) {
     for (const reporter of this._reporters)
-      await Promise.resolve().then(() => reporter.onEnd?.(result)).catch(e => console.error('Error in reporter', e));
+      await wrapAsync(() => reporter.onEnd?.(result));
+  }
 
+  async onExit() {
     for (const reporter of this._reporters)
-      await Promise.resolve().then(() => reporter.onExit?.()).catch(e => console.error('Error in reporter', e));
+      await wrapAsync(() => reporter.onExit?.());
   }
 
   onError(error: TestError) {
-    if (this._deferred) {
-      this._deferred.push({ error });
-      return;
-    }
-    addSnippetToError(this._config.config, error);
     for (const reporter of this._reporters)
       wrap(() => reporter.onError?.(error));
   }
 
   onStepBegin(test: TestCase, result: TestResult, step: TestStep) {
     for (const reporter of this._reporters)
-      wrap(() => (reporter as any).onStepBegin?.(test, result, step));
+      wrap(() => reporter.onStepBegin?.(test, result, step));
   }
 
   onStepEnd(test: TestCase, result: TestResult, step: TestStep) {
-    this._addSnippetToStepError(test, step);
     for (const reporter of this._reporters)
-      wrap(() => (reporter as any).onStepEnd?.(test, result, step));
+      wrap(() => reporter.onStepEnd?.(test, result, step));
   }
+}
 
-  private _addSnippetToTestErrors(test: TestCase, result: TestResult) {
-    for (const error of result.errors)
-      addSnippetToError(this._config.config, error, test.location.file);
+async function wrapAsync(callback: () => void | Promise<void>) {
+  try {
+    await callback();
+  } catch (e) {
+    console.error('Error in reporter', e);
   }
-
-  private _addSnippetToStepError(test: TestCase, step: TestStep) {
-    if (step.error)
-      addSnippetToError(this._config.config, step.error, test.location.file);
-  }
-
 }
 
 function wrap(callback: () => void) {
diff --git a/packages/playwright-test/src/runner/dispatcher.ts b/packages/playwright-test/src/runner/dispatcher.ts
index 29bc40375f..3b4f39c6e6 100644
--- a/packages/playwright-test/src/runner/dispatcher.ts
+++ b/packages/playwright-test/src/runner/dispatcher.ts
@@ -24,7 +24,7 @@ import { ManualPromise } from 'playwright-core/lib/utils';
 import { WorkerHost } from './workerHost';
 import type { TestGroup } from './testGroups';
 import type { FullConfigInternal } from '../common/config';
-import type { Multiplexer } from '../reporters/multiplexer';
+import type { InternalReporter } from '../reporters/internalReporter';
 
 type TestResultData = {
   result: TestResult;
@@ -46,14 +46,14 @@ export class Dispatcher {
 
   private _testById = new Map<string, TestData>();
   private _config: FullConfigInternal;
-  private _reporter: Multiplexer;
+  private _reporter: InternalReporter;
   private _hasWorkerErrors = false;
   private _failureCount = 0;
 
   private _extraEnvByProjectId: EnvByProjectId = new Map();
   private _producedEnvByProjectId: EnvByProjectId = new Map();
 
-  constructor(config: FullConfigInternal, reporter: Multiplexer) {
+  constructor(config: FullConfigInternal, reporter: InternalReporter) {
     this._config = config;
     this._reporter = reporter;
   }
@@ -75,7 +75,7 @@ export class Dispatcher {
       for (const test of group.tests) {
         const result = test._appendTestResult();
         result.status = 'skipped';
-        this._reporter.onTestBegin?.(test, result);
+        this._reporter.onTestBegin(test, result);
         test.annotations = [...test._staticAnnotations];
         this._reportTestEnd(test, result);
       }
@@ -222,7 +222,7 @@ export class Dispatcher {
       result.parallelIndex = worker.parallelIndex;
       result.workerIndex = worker.workerIndex;
       result.startTime = new Date(params.startWallTime);
-      this._reporter.onTestBegin?.(data.test, result);
+      this._reporter.onTestBegin(data.test, result);
       worker.currentTestId = params.testId;
     };
     worker.addListener('testBegin', onTestBegin);
@@ -284,7 +284,7 @@ export class Dispatcher {
       };
       steps.set(params.stepId, step);
       (parentStep || result).steps.push(step);
-      this._reporter.onStepBegin?.(data.test, result, step);
+      this._reporter.onStepBegin(data.test, result, step);
     };
     worker.on('stepBegin', onStepBegin);
 
@@ -298,14 +298,14 @@ export class Dispatcher {
       const { result, steps } = runData;
       const step = steps.get(params.stepId);
       if (!step) {
-        this._reporter.onStdErr?.('Internal error: step end without step begin: ' + params.stepId, data.test, result);
+        this._reporter.onStdErr('Internal error: step end without step begin: ' + params.stepId, data.test, result);
         return;
       }
       step.duration = params.wallTime - step.startTime.getTime();
       if (params.error)
         step.error = params.error;
       steps.delete(params.stepId);
-      this._reporter.onStepEnd?.(data.test, result, step);
+      this._reporter.onStepEnd(data.test, result, step);
     };
     worker.on('stepEnd', onStepEnd);
 
@@ -342,7 +342,7 @@ export class Dispatcher {
               if (onlyStartedTests)
                 return true;
               result = data.test._appendTestResult();
-              this._reporter.onTestBegin?.(test, result);
+              this._reporter.onTestBegin(test, result);
             }
             result.errors = [...errors];
             result.error = result.errors[0];
@@ -358,7 +358,7 @@ export class Dispatcher {
           // Let's just fail the test run.
           this._hasWorkerErrors = true;
           for (const error of params.fatalErrors)
-            this._reporter.onError?.(error);
+            this._reporter.onError(error);
         }
       };
 
@@ -410,7 +410,7 @@ export class Dispatcher {
 
         // Emulate a "skipped" run, and drop this test from remaining.
         const result = test._appendTestResult();
-        this._reporter.onTestBegin?.(test, result);
+        this._reporter.onTestBegin(test, result);
         result.status = 'skipped';
         this._reportTestEnd(test, result);
         return false;
@@ -470,17 +470,17 @@ export class Dispatcher {
     worker.on('stdOut', (params: TestOutputPayload) => {
       const { chunk, test, result } = handleOutput(params);
       result?.stdout.push(chunk);
-      this._reporter.onStdOut?.(chunk, test, result);
+      this._reporter.onStdOut(chunk, test, result);
     });
     worker.on('stdErr', (params: TestOutputPayload) => {
       const { chunk, test, result } = handleOutput(params);
       result?.stderr.push(chunk);
-      this._reporter.onStdErr?.(chunk, test, result);
+      this._reporter.onStdErr(chunk, test, result);
     });
     worker.on('teardownErrors', (params: TeardownErrorsPayload) => {
       this._hasWorkerErrors = true;
       for (const error of params.fatalErrors)
-        this._reporter.onError?.(error);
+        this._reporter.onError(error);
     });
     worker.on('exit', () => {
       const producedEnv = this._producedEnvByProjectId.get(testGroup.projectId) || {};
@@ -509,7 +509,7 @@ export class Dispatcher {
   private _reportTestEnd(test: TestCase, result: TestResult) {
     if (result.status !== 'skipped' && result.status !== test.expectedStatus)
       ++this._failureCount;
-    this._reporter.onTestEnd?.(test, result);
+    this._reporter.onTestEnd(test, result);
     const maxFailures = this._config.config.maxFailures;
     if (maxFailures && this._failureCount === maxFailures)
       this.stop().catch(e => {});
diff --git a/packages/playwright-test/src/runner/runner.ts b/packages/playwright-test/src/runner/runner.ts
index c1e6ff914e..d54fb6b7bb 100644
--- a/packages/playwright-test/src/runner/runner.ts
+++ b/packages/playwright-test/src/runner/runner.ts
@@ -25,7 +25,7 @@ import type { FullConfigInternal } from '../common/config';
 import { colors } from 'playwright-core/lib/utilsBundle';
 import { runWatchModeLoop } from './watchMode';
 import { runUIMode } from './uiMode';
-import { Multiplexer } from '../reporters/multiplexer';
+import { InternalReporter } from '../reporters/internalReporter';
 
 export class Runner {
   private _config: FullConfigInternal;
@@ -69,7 +69,7 @@ export class Runner {
     // Legacy webServer support.
     webServerPluginsForConfig(config).forEach(p => config.plugins.push({ factory: p }));
 
-    const reporter = new Multiplexer(await createReporters(config, listOnly ? 'list' : 'run'));
+    const reporter = new InternalReporter(await createReporters(config, listOnly ? 'list' : 'run'));
     const taskRunner = listOnly ? createTaskRunnerForList(config, reporter, 'in-process')
       : createTaskRunner(config, reporter);
 
diff --git a/packages/playwright-test/src/runner/taskRunner.ts b/packages/playwright-test/src/runner/taskRunner.ts
index 9b1de708a5..55190d4989 100644
--- a/packages/playwright-test/src/runner/taskRunner.ts
+++ b/packages/playwright-test/src/runner/taskRunner.ts
@@ -19,20 +19,20 @@ import { ManualPromise, monotonicTime } from 'playwright-core/lib/utils';
 import type { FullResult, TestError } from '../../reporter';
 import { SigIntWatcher } from './sigIntWatcher';
 import { serializeError } from '../util';
-import type { Multiplexer } from '../reporters/multiplexer';
+import type { InternalReporter } from '../reporters/internalReporter';
 
 type TaskTeardown = () => Promise<any> | undefined;
 export type Task<Context> = (context: Context, errors: TestError[]) => Promise<TaskTeardown | void> | undefined;
 
 export class TaskRunner<Context> {
   private _tasks: { name: string, task: Task<Context> }[] = [];
-  private _reporter: Multiplexer;
+  private _reporter: InternalReporter;
   private _hasErrors = false;
   private _interrupted = false;
   private _isTearDown = false;
   private _globalTimeoutForError: number;
 
-  constructor(reporter: Multiplexer, globalTimeoutForError: number) {
+  constructor(reporter: InternalReporter, globalTimeoutForError: number) {
     this._reporter = reporter;
     this._globalTimeoutForError = globalTimeoutForError;
   }
diff --git a/packages/playwright-test/src/runner/tasks.ts b/packages/playwright-test/src/runner/tasks.ts
index 28d55043fa..f63b89c2c7 100644
--- a/packages/playwright-test/src/runner/tasks.ts
+++ b/packages/playwright-test/src/runner/tasks.ts
@@ -20,7 +20,7 @@ import { promisify } from 'util';
 import { debug, rimraf } from 'playwright-core/lib/utilsBundle';
 import { Dispatcher, type EnvByProjectId } from './dispatcher';
 import type { TestRunnerPluginRegistration } from '../plugins';
-import type { Multiplexer } from '../reporters/multiplexer';
+import type { InternalReporter } from '../reporters/internalReporter';
 import { createTestGroups, type TestGroup } from '../runner/testGroups';
 import type { Task } from './taskRunner';
 import { TaskRunner } from './taskRunner';
@@ -44,7 +44,7 @@ export type Phase = {
 };
 
 export class TestRun {
-  readonly reporter: Multiplexer;
+  readonly reporter: InternalReporter;
   readonly config: FullConfigInternal;
   rootSuite: Suite | undefined = undefined;
   readonly phases: Phase[] = [];
@@ -53,13 +53,13 @@ export class TestRun {
   projectType: Map<FullProjectInternal, 'top-level' | 'dependency'> = new Map();
   projectSuites: Map<FullProjectInternal, Suite[]> = new Map();
 
-  constructor(config: FullConfigInternal, reporter: Multiplexer) {
+  constructor(config: FullConfigInternal, reporter: InternalReporter) {
     this.config = config;
     this.reporter = reporter;
   }
 }
 
-export function createTaskRunner(config: FullConfigInternal, reporter: Multiplexer): TaskRunner<TestRun> {
+export function createTaskRunner(config: FullConfigInternal, reporter: InternalReporter): TaskRunner<TestRun> {
   const taskRunner = new TaskRunner<TestRun>(reporter, config.config.globalTimeout);
   addGlobalSetupTasks(taskRunner, config);
   taskRunner.addTask('load tests', createLoadTask('in-process', true));
@@ -67,13 +67,13 @@ export function createTaskRunner(config: FullConfigInternal, reporter: Multiplex
   return taskRunner;
 }
 
-export function createTaskRunnerForWatchSetup(config: FullConfigInternal, reporter: Multiplexer): TaskRunner<TestRun> {
+export function createTaskRunnerForWatchSetup(config: FullConfigInternal, reporter: InternalReporter): TaskRunner<TestRun> {
   const taskRunner = new TaskRunner<TestRun>(reporter, 0);
   addGlobalSetupTasks(taskRunner, config);
   return taskRunner;
 }
 
-export function createTaskRunnerForWatch(config: FullConfigInternal, reporter: Multiplexer, additionalFileMatcher?: Matcher): TaskRunner<TestRun> {
+export function createTaskRunnerForWatch(config: FullConfigInternal, reporter: InternalReporter, additionalFileMatcher?: Matcher): TaskRunner<TestRun> {
   const taskRunner = new TaskRunner<TestRun>(reporter, 0);
   taskRunner.addTask('load tests', createLoadTask('out-of-process', true, additionalFileMatcher));
   addRunTasks(taskRunner, config);
@@ -91,7 +91,7 @@ function addGlobalSetupTasks(taskRunner: TaskRunner<TestRun>, config: FullConfig
 function addRunTasks(taskRunner: TaskRunner<TestRun>, config: FullConfigInternal) {
   taskRunner.addTask('create phases', createPhasesTask());
   taskRunner.addTask('report begin', async ({ reporter, rootSuite }) => {
-    reporter.onBegin?.(config.config, rootSuite!);
+    reporter.onBegin(config.config, rootSuite!);
     return () => reporter.onEnd();
   });
   for (const plugin of config.plugins)
@@ -101,11 +101,11 @@ function addRunTasks(taskRunner: TaskRunner<TestRun>, config: FullConfigInternal
   return taskRunner;
 }
 
-export function createTaskRunnerForList(config: FullConfigInternal, reporter: Multiplexer, mode: 'in-process' | 'out-of-process'): TaskRunner<TestRun> {
+export function createTaskRunnerForList(config: FullConfigInternal, reporter: InternalReporter, mode: 'in-process' | 'out-of-process'): TaskRunner<TestRun> {
   const taskRunner = new TaskRunner<TestRun>(reporter, config.config.globalTimeout);
   taskRunner.addTask('load tests', createLoadTask(mode, false));
   taskRunner.addTask('report begin', async ({ reporter, rootSuite }) => {
-    reporter.onBegin?.(config.config, rootSuite!);
+    reporter.onBegin(config.config, rootSuite!);
     return () => reporter.onEnd();
   });
   return taskRunner;
diff --git a/packages/playwright-test/src/runner/uiMode.ts b/packages/playwright-test/src/runner/uiMode.ts
index 96dbdb5096..0b99a5c137 100644
--- a/packages/playwright-test/src/runner/uiMode.ts
+++ b/packages/playwright-test/src/runner/uiMode.ts
@@ -20,7 +20,7 @@ import { isUnderTest, ManualPromise } from 'playwright-core/lib/utils';
 import type { FullResult } from '../../reporter';
 import { clearCompilationCache, collectAffectedTestFiles, dependenciesForTestFile } from '../common/compilationCache';
 import type { FullConfigInternal } from '../common/config';
-import { Multiplexer } from '../reporters/multiplexer';
+import { InternalReporter } from '../reporters/internalReporter';
 import { TeleReporterEmitter } from '../reporters/teleEmitter';
 import { createReporters } from './reporters';
 import { TestRun, createTaskRunnerForList, createTaskRunnerForWatch, createTaskRunnerForWatchSetup } from './tasks';
@@ -65,7 +65,7 @@ class UIMode {
   }
 
   async runGlobalSetup(): Promise<FullResult['status']> {
-    const reporter = new Multiplexer([new ListReporter()]);
+    const reporter = new InternalReporter([new ListReporter()]);
     const taskRunner = createTaskRunnerForWatchSetup(this._config, reporter);
     reporter.onConfigure(this._config);
     const testRun = new TestRun(this._config, reporter);
@@ -144,7 +144,7 @@ class UIMode {
 
   private async _listTests() {
     const listReporter = new TeleReporterEmitter(e => this._dispatchEvent(e));
-    const reporter = new Multiplexer([listReporter]);
+    const reporter = new InternalReporter([listReporter]);
     this._config.cliListOnly = true;
     this._config.testIdMatcher = undefined;
     const taskRunner = createTaskRunnerForList(this._config, reporter, 'out-of-process');
@@ -169,7 +169,7 @@ class UIMode {
 
     const reporters = await createReporters(this._config, 'ui');
     reporters.push(new TeleReporterEmitter(e => this._dispatchEvent(e)));
-    const reporter = new Multiplexer(reporters);
+    const reporter = new InternalReporter(reporters);
     const taskRunner = createTaskRunnerForWatch(this._config, reporter);
     const testRun = new TestRun(this._config, reporter);
     clearCompilationCache();
diff --git a/packages/playwright-test/src/runner/watchMode.ts b/packages/playwright-test/src/runner/watchMode.ts
index fe595de7d5..e446671371 100644
--- a/packages/playwright-test/src/runner/watchMode.ts
+++ b/packages/playwright-test/src/runner/watchMode.ts
@@ -17,7 +17,7 @@
 import readline from 'readline';
 import { createGuid, ManualPromise } from 'playwright-core/lib/utils';
 import type { FullConfigInternal, FullProjectInternal } from '../common/config';
-import { Multiplexer } from '../reporters/multiplexer';
+import { InternalReporter } from '../reporters/internalReporter';
 import { createFileMatcher, createFileMatcherFromArguments } from '../util';
 import type { Matcher } from '../util';
 import { TestRun, createTaskRunnerForWatch, createTaskRunnerForWatchSetup } from './tasks';
@@ -112,7 +112,7 @@ export async function runWatchModeLoop(config: FullConfigInternal): Promise<Full
     p.project.retries = 0;
 
   // Perform global setup.
-  const reporter = new Multiplexer([new ListReporter()]);
+  const reporter = new InternalReporter([new ListReporter()]);
   const testRun = new TestRun(config, reporter);
   const taskRunner = createTaskRunnerForWatchSetup(config, reporter);
   reporter.onConfigure(config);
@@ -275,7 +275,7 @@ async function runTests(config: FullConfigInternal, failedTestIdCollector: Set<s
     title?: string,
   }) {
   printConfiguration(config, options?.title);
-  const reporter = new Multiplexer([new ListReporter()]);
+  const reporter = new InternalReporter([new ListReporter()]);
   const taskRunner = createTaskRunnerForWatch(config, reporter, options?.additionalFileMatcher);
   const testRun = new TestRun(config, reporter);
   clearCompilationCache();