diff --git a/composer.lock b/composer.lock
index d6f175f..cb9dd3d 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4326,6 +4326,65 @@
             "description": "Symfony CssSelector Component",
             "homepage": "https://symfony.com",
             "time": "2017-02-21T08:33:48+00:00"
+        },
+        {
+            "name": "symfony/phpunit-bridge",
+            "version": "v3.2.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/phpunit-bridge.git",
+                "reference": "996374975357b569ea319ec1c98c5ca0f7dda610"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/996374975357b569ea319ec1c98c5ca0f7dda610",
+                "reference": "996374975357b569ea319ec1c98c5ca0f7dda610",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "suggest": {
+                "ext-zip": "Zip support is required when using bin/simple-phpunit",
+                "symfony/debug": "For tracking deprecated interfaces usages at runtime with DebugClassLoader"
+            },
+            "bin": [
+                "bin/simple-phpunit"
+            ],
+            "type": "symfony-bridge",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.2-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Bridge\\PhpUnit\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony PHPUnit Bridge",
+            "homepage": "https://symfony.com",
+            "time": "2017-01-21T17:06:35+00:00"
         }
     ],
     "aliases": [],
diff --git a/core/composer.json b/core/composer.json
index c77bc30..7a30f19 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -44,7 +44,8 @@
         "mikey179/vfsStream": "~1.2",
         "phpunit/phpunit": ">=4.8.28 <5",
         "symfony/browser-kit": ">=2.8.13 <3.0",
-        "symfony/css-selector": "~2.8"
+        "symfony/css-selector": "~2.8",
+        "symfony/phpunit-bridge": "^3.2"
     },
     "replace": {
         "drupal/action": "self.version",
diff --git a/core/phpunit.xml.dist b/core/phpunit.xml.dist
index ef1ae3b..c85258d 100644
--- a/core/phpunit.xml.dist
+++ b/core/phpunit.xml.dist
@@ -45,6 +45,8 @@
     </testsuite>
   </testsuites>
   <listeners>
+    <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener">
+    </listener>
     <listener class="\Drupal\Tests\Listeners\DrupalStandardsListener">
     </listener>
   </listeners>
diff --git a/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php b/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php
index 8aa9d9a..67c4103 100644
--- a/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php
+++ b/core/tests/Drupal/Tests/Component/DependencyInjection/ContainerTest.php
@@ -675,6 +675,8 @@ public function testInitializedForAliases() {
    * @expectedException \BadMethodCallException
    *
    * @dataProvider scopeExceptionTestProvider
+   *
+   * @group legacy
    */
   public function testScopeFunctionsWithException($method, $argument) {
     $callable = [
diff --git a/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php b/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
index a899aaa..1de9ce9 100644
--- a/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
+++ b/core/tests/Drupal/Tests/Component/DependencyInjection/Dumper/OptimizedPhpArrayDumperTest.php
@@ -209,6 +209,8 @@ public function getParametersDataProvider() {
      * @covers ::getParameterCall
      *
      * @dataProvider getDefinitionsDataProvider
+     *
+     * @group legacy
      */
     public function testGetServiceDefinitions($services, $definition_services) {
       $this->containerDefinition['services'] = $definition_services;
@@ -484,6 +486,8 @@ protected function getServiceCall($id, $invalid_behavior = ContainerInterface::E
      * @covers ::getServiceDefinition
      *
      * @expectedException \Symfony\Component\DependencyInjection\Exception\InvalidArgumentException
+     *
+     * @group legacy
      */
     public function testGetServiceDefinitionWithInvalidScope() {
       $bar_definition = new Definition('\stdClass');
@@ -500,6 +504,8 @@ public function testGetServiceDefinitionWithInvalidScope() {
      * @covers ::getReferenceCall
      *
      * @dataProvider publicPrivateDataProvider
+     *
+     * @group legacy
      */
     public function testGetServiceDefinitionWithReferenceToAlias($public) {
       $bar_definition = new Definition('\stdClass');
@@ -557,6 +563,8 @@ public function publicPrivateDataProvider() {
      * @covers ::getServiceDefinition
      *
      * @expectedException \Symfony\Component\DependencyInjection\Exception\InvalidArgumentException
+     *
+     * @group legacy
      */
     public function testGetServiceDefinitionForDecoratedService() {
       $bar_definition = new Definition('\stdClass');
diff --git a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
index b9dc671..c9bccce 100644
--- a/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/AttributeTest.php
@@ -261,6 +261,8 @@ public function testChainAddRemoveClasses() {
    *
    * @covers ::removeClass
    * @covers ::addClass
+   *
+   * @group legacy
    */
   public function testTwigAddRemoveClasses($template, $expected, $seed_attributes = []) {
     $loader = new \Twig_Loader_String();
diff --git a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
index c4805bc..7b426f2 100644
--- a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
@@ -73,6 +73,8 @@ public function setUp() {
    * Tests the escaping
    *
    * @dataProvider providerTestEscaping
+   *
+   * @group legacy
    */
   public function testEscaping($template, $expected) {
     $twig = new \Twig_Environment(NULL, [
@@ -123,6 +125,8 @@ public function providerTestEscaping() {
 
   /**
    * Tests the active_theme function.
+   *
+   * @group legacy
    */
   public function testActiveTheme() {
     $active_theme = $this->getMockBuilder('\Drupal\Core\Theme\ActiveTheme')
@@ -183,6 +187,8 @@ public function testActiveThemePath() {
    * Tests the escaping of objects implementing MarkupInterface.
    *
    * @covers ::escapeFilter
+   *
+   * @group legacy
    */
   public function testSafeStringEscaping() {
     $twig = new \Twig_Environment(NULL, [
@@ -267,6 +273,8 @@ public function providerTestRenderVar() {
   /**
    * @covers ::escapeFilter
    * @covers ::bubbleArgMetadata
+   *
+   * @group legacy
    */
   public function testEscapeWithGeneratedLink() {
     $twig = new \Twig_Environment(NULL, [
diff --git a/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeTest.php b/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeTest.php
new file mode 100644
index 0000000..b91d0c3
--- /dev/null
+++ b/core/tests/Drupal/Tests/Core/Test/PhpUnitBridgeTest.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Drupal\Tests\Core\Test;
+
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * Tests Drupal's integration with Symfony PHPUnit Bridge.
+ *
+ * @group legacy
+ */
+class PhpUnitBridgeTest extends UnitTestCase {
+
+  /**
+   * @expectedDeprecation Testing Symfony PHPUnit Bridge with silenced errors
+   */
+  public function testSilencedError() {
+    @trigger_error('Testing Symfony PHPUnit Bridge with silenced errors', E_USER_DEPRECATED);
+
+    // Perform an assertion so this is not a risky test.
+    $this->assertTrue(TRUE);
+  }
+
+}