diff --git a/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php b/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php
index 5c98cbd5880fff048ef429155ff6ccd4cc65678b..0931f20e02799680977bb2456517c987f3390a0d 100644
--- a/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php
@@ -21,14 +21,12 @@ public function testPhpUnitListTests() {
     // The goal here is to successfully generate the list, without any
     // duplicate namespace errors or so forth. This keeps us from committing
     // tests which don't break under run-tests.sh, but do break under the
-    // PHPUnit CLI test runner tool.
+    // phpunit test runner tool.
     $process = Process::fromShellCommandline('vendor/bin/phpunit --configuration core --verbose --list-tests');
     $process->setWorkingDirectory($this->root)
       ->setTimeout(300)
       ->setIdleTimeout(300);
-    // We disable deprecations since we do not care about them in this test,
-    // and deprecated classes will trigger an error when loading.
-    $process->run(NULL, ['SYMFONY_DEPRECATIONS_HELPER' => 'disabled']);
+    $process->run();
     $this->assertEquals(0, $process->getExitCode(),
       'COMMAND: ' . $process->getCommandLine() . "\n" .
       'OUTPUT: ' . $process->getOutput() . "\n" .
diff --git a/core/tests/Drupal/Tests/Core/Test/TestSuiteBaseTest.php b/core/tests/Drupal/Tests/Core/Test/TestSuiteBaseTest.php
index 1f53f981775e562bed4f5a4073bd641a569403b8..2589132ca2f8eef89fb6e558b50fbb95ad0aae2f 100644
--- a/core/tests/Drupal/Tests/Core/Test/TestSuiteBaseTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/TestSuiteBaseTest.php
@@ -7,7 +7,6 @@
 use Drupal\Tests\TestSuites\TestSuiteBase;
 use org\bovigo\vfs\vfsStream;
 use PHPUnit\Framework\TestCase;
-use Symfony\Bridge\PhpUnit\ExpectDeprecationTrait;
 
 // The test suite class is not part of the autoloader, we need to include it
 // manually.
@@ -20,8 +19,6 @@
  */
 class TestSuiteBaseTest extends TestCase {
 
-  use ExpectDeprecationTrait;
-
   /**
    * Helper method to set up the file system.
    *
@@ -84,16 +81,11 @@ public function provideCoreTests() {
   /**
    * Tests for special case behavior of unit test suite namespaces in core.
    *
-   * @group legacy
-   *
    * @covers ::addTestsBySuiteNamespace
    *
    * @dataProvider provideCoreTests
    */
   public function testAddTestsBySuiteNamespaceCore($filesystem, $suite_namespace, $expected_tests) {
-
-    $this->expectDeprecation('Drupal\\Tests\\Core\\Test\\StubTestSuiteBase is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829');
-
     // Set up the file system.
     $vfs = vfsStream::setup('root');
     vfsStream::create($filesystem, $vfs);
@@ -126,8 +118,6 @@ public function testLocalTimeZone() {
  *
  * We use this class to alter the behavior of TestSuiteBase so it can be
  * testable.
- *
- * @phpstan-ignore-next-line
  */
 class StubTestSuiteBase extends TestSuiteBase {
 
@@ -138,12 +128,6 @@ class StubTestSuiteBase extends TestSuiteBase {
    */
   public $testFiles = [];
 
-  public function __construct(string $name) {
-    @trigger_error(__CLASS__ . ' is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-    // @phpstan-ignore-next-line
-    parent::__construct($name);
-  }
-
   /**
    * {@inheritdoc}
    */
diff --git a/core/tests/TestSuites/BuildTestSuite.php b/core/tests/TestSuites/BuildTestSuite.php
index c743820021bfc0b485b895b3457b8cfbc7f9d904..39c4660c7aae42832af5614363d5499287259f65 100644
--- a/core/tests/TestSuites/BuildTestSuite.php
+++ b/core/tests/TestSuites/BuildTestSuite.php
@@ -4,19 +4,10 @@
 
 namespace Drupal\Tests\TestSuites;
 
-@trigger_error('\Drupal\Tests\TestSuites\BuildTestSuite is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-
 require_once __DIR__ . '/TestSuiteBase.php';
 
 /**
  * Discovers tests for the build test suite.
- *
- * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no
- *   replacement and test discovery will be handled differently in PHPUnit 10.
- *
- * @see https://www.drupal.org/node/3405829
- *
- * @phpstan-ignore-next-line
  */
 class BuildTestSuite extends TestSuiteBase {
 
diff --git a/core/tests/TestSuites/FunctionalJavascriptTestSuite.php b/core/tests/TestSuites/FunctionalJavascriptTestSuite.php
index 1c4c4315e3e3e36ddd5dac3eedc77c51a0b81de6..d026e725e82accd649bb0a7392c0e9fca71078ea 100644
--- a/core/tests/TestSuites/FunctionalJavascriptTestSuite.php
+++ b/core/tests/TestSuites/FunctionalJavascriptTestSuite.php
@@ -4,19 +4,10 @@
 
 namespace Drupal\Tests\TestSuites;
 
-@trigger_error('\Drupal\Tests\TestSuites\FunctionalJavascriptTestSuite is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-
 require_once __DIR__ . '/TestSuiteBase.php';
 
 /**
  * Discovers tests for the functional-javascript test suite.
- *
- * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no
- *   replacement and test discovery will be handled differently in PHPUnit 10.
- *
- * @see https://www.drupal.org/node/3405829
- *
- * @phpstan-ignore-next-line
  */
 class FunctionalJavascriptTestSuite extends TestSuiteBase {
 
diff --git a/core/tests/TestSuites/FunctionalTestSuite.php b/core/tests/TestSuites/FunctionalTestSuite.php
index 1cf5d9945aa0be983af874e40e1b7cbd4d0dabd2..1ddbde2b32e4dd61fb9aae68d59e665f4e026c02 100644
--- a/core/tests/TestSuites/FunctionalTestSuite.php
+++ b/core/tests/TestSuites/FunctionalTestSuite.php
@@ -4,19 +4,10 @@
 
 namespace Drupal\Tests\TestSuites;
 
-@trigger_error('\Drupal\Tests\TestSuites\FunctionalTestSuite is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-
 require_once __DIR__ . '/TestSuiteBase.php';
 
 /**
  * Discovers tests for the functional test suite.
- *
- * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no
- *   replacement and test discovery will be handled differently in PHPUnit 10.
- *
- * @see https://www.drupal.org/node/3405829
- *
- * @phpstan-ignore-next-line
  */
 class FunctionalTestSuite extends TestSuiteBase {
 
diff --git a/core/tests/TestSuites/KernelTestSuite.php b/core/tests/TestSuites/KernelTestSuite.php
index a9936df922d69259ea8da427a163e296c79b816f..1fb4be33f4c3ad72e44e044223c118fe4560349d 100644
--- a/core/tests/TestSuites/KernelTestSuite.php
+++ b/core/tests/TestSuites/KernelTestSuite.php
@@ -4,19 +4,10 @@
 
 namespace Drupal\Tests\TestSuites;
 
-@trigger_error('\Drupal\Tests\TestSuites\KernelTestSuite is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-
 require_once __DIR__ . '/TestSuiteBase.php';
 
 /**
  * Discovers tests for the kernel test suite.
- *
- * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no
- *   replacement and test discovery will be handled differently in PHPUnit 10.
- *
- * @see https://www.drupal.org/node/3405829
- *
- * @phpstan-ignore-next-line
  */
 class KernelTestSuite extends TestSuiteBase {
 
diff --git a/core/tests/TestSuites/TestSuiteBase.php b/core/tests/TestSuites/TestSuiteBase.php
index c2236293da9f986bfc15061a87c23de9451bd974..70ee9f7c5a1fa4b79960094083b94c5b5ac1aaad 100644
--- a/core/tests/TestSuites/TestSuiteBase.php
+++ b/core/tests/TestSuites/TestSuiteBase.php
@@ -9,19 +9,9 @@
 
 /**
  * Base class for Drupal test suites.
- *
- * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no
- *   replacement and test discovery will be handled differently in PHPUnit 10.
- *
- * @see https://www.drupal.org/node/3405829
  */
 abstract class TestSuiteBase extends TestSuite {
 
-  public function __construct($theClass = '', string $name = '') {
-    @trigger_error(__CLASS__ . ' is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-    parent::__construct($theClass, $name);
-  }
-
   /**
    * Finds extensions in a Drupal installation.
    *
diff --git a/core/tests/TestSuites/UnitTestSuite.php b/core/tests/TestSuites/UnitTestSuite.php
index 2daf44f7052a8aecd0e0407751e43582c6578dfa..c24d8f85b94f8898b0968d9d13c18d680a390e84 100644
--- a/core/tests/TestSuites/UnitTestSuite.php
+++ b/core/tests/TestSuites/UnitTestSuite.php
@@ -4,19 +4,10 @@
 
 namespace Drupal\Tests\TestSuites;
 
-@trigger_error('\Drupal\Tests\TestSuites\UnitTestSuite is deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no replacement and test discovery will be handled differently in PHPUnit 10. See https://www.drupal.org/node/3405829', E_USER_DEPRECATED);
-
 require_once __DIR__ . '/TestSuiteBase.php';
 
 /**
  * Discovers tests for the unit test suite.
- *
- * @deprecated in drupal:10.3.0 and is removed from drupal:11.0.0. There is no
- *   replacement and test discovery will be handled differently in PHPUnit 10.
- *
- * @see https://www.drupal.org/node/3405829
- *
- * @phpstan-ignore-next-line
  */
 class UnitTestSuite extends TestSuiteBase {