diff --git a/core/lib/Drupal/Component/DependencyInjection/Container.php b/core/lib/Drupal/Component/DependencyInjection/Container.php
index 7f6d54b4c0..44fa2390ef 100644
--- a/core/lib/Drupal/Component/DependencyInjection/Container.php
+++ b/core/lib/Drupal/Component/DependencyInjection/Container.php
@@ -304,6 +304,8 @@ protected function createService(array $definition, $id) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function set($id, $service) {
     $this->services[$id] = $service;
@@ -340,6 +342,8 @@ public function hasParameter($name): bool {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setParameter($name, $value) {
     if ($this->frozen) {
diff --git a/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php b/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
index 4e0d579e25..3196abe19a 100644
--- a/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
+++ b/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php
@@ -210,6 +210,8 @@ public function hasListeners($event_name = NULL): bool {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function addListener($event_name, $listener, $priority = 0) {
     $this->listeners[$event_name][$priority][] = ['callable' => $listener];
@@ -218,6 +220,8 @@ public function addListener($event_name, $listener, $priority = 0) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function removeListener($event_name, $listener) {
     if (!isset($this->listeners[$event_name])) {
@@ -255,6 +259,8 @@ public function removeListener($event_name, $listener) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function addSubscriber(EventSubscriberInterface $subscriber) {
     foreach ($subscriber->getSubscribedEvents() as $event_name => $params) {
@@ -274,6 +280,8 @@ public function addSubscriber(EventSubscriberInterface $subscriber) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function removeSubscriber(EventSubscriberInterface $subscriber) {
     foreach ($subscriber->getSubscribedEvents() as $event_name => $params) {
diff --git a/core/lib/Drupal/Core/Command/DbCommandBase.php b/core/lib/Drupal/Core/Command/DbCommandBase.php
index ff620e4d9b..bed5092b2f 100644
--- a/core/lib/Drupal/Core/Command/DbCommandBase.php
+++ b/core/lib/Drupal/Core/Command/DbCommandBase.php
@@ -14,6 +14,8 @@ class DbCommandBase extends Command {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   protected function configure() {
     $this->addOption('database', NULL, InputOption::VALUE_OPTIONAL, 'The database connection name to use.', 'default')
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/AuthenticationProviderPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/AuthenticationProviderPass.php
index 20708e1221..939966cf17 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/AuthenticationProviderPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/AuthenticationProviderPass.php
@@ -12,6 +12,8 @@ class AuthenticationProviderPass implements CompilerPassInterface {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function process(ContainerBuilder $container) {
     $authentication_providers = [];
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/BackendCompilerPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/BackendCompilerPass.php
index b139bb71d5..994a60b158 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/BackendCompilerPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/BackendCompilerPass.php
@@ -35,6 +35,8 @@ class BackendCompilerPass implements CompilerPassInterface {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function process(ContainerBuilder $container) {
     $driver_backend = NULL;
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/ProxyServicesPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/ProxyServicesPass.php
index 1b1f03577c..9ae2828633 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/ProxyServicesPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/ProxyServicesPass.php
@@ -16,6 +16,8 @@ class ProxyServicesPass implements CompilerPassInterface {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function process(ContainerBuilder $container) {
     foreach ($container->getDefinitions() as $service_id => $definition) {
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php
index da17bb5c64..81907c1f0d 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/StackedKernelPass.php
@@ -50,6 +50,8 @@ class StackedKernelPass implements CompilerPassInterface {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function process(ContainerBuilder $container) {
 
diff --git a/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php b/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php
index 8022440efa..2e0fa74c32 100644
--- a/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php
+++ b/core/lib/Drupal/Core/DependencyInjection/Compiler/TaggedHandlersPass.php
@@ -101,6 +101,8 @@ class TaggedHandlersPass implements CompilerPassInterface {
    *   If a tagged handler does not implement the required interface.
    * @throws \Symfony\Component\DependencyInjection\Exception\LogicException
    *   If at least one tagged service is required but none are found.
+   *
+   * @return void
    */
   public function process(ContainerBuilder $container) {
     // Avoid using ContainerBuilder::findTaggedServiceIds() as that results in
diff --git a/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php b/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php
index c7b4648704..37a5b35e4e 100644
--- a/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php
+++ b/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php
@@ -39,6 +39,8 @@ public function __construct(ParameterBagInterface $parameterBag = NULL) {
    * @todo Restrict this to synthetic services only. Ideally, the upstream
    *   ContainerBuilder class should be fixed to allow setting synthetic
    *   services in a frozen builder.
+   *
+   * @return void
    */
   public function set($id, $service) {
     SymfonyContainer::set($id, $service);
@@ -67,6 +69,8 @@ public function setAlias($alias, $id): Alias {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setParameter($name, $value) {
     if (strtolower($name) !== $name) {
diff --git a/core/lib/Drupal/Core/DrupalKernel.php b/core/lib/Drupal/Core/DrupalKernel.php
index a2eb065c7a..a5b5cc33b6 100644
--- a/core/lib/Drupal/Core/DrupalKernel.php
+++ b/core/lib/Drupal/Core/DrupalKernel.php
@@ -531,6 +531,8 @@ public function getContainer() {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setContainer(ContainerInterface $container = NULL) {
     if (isset($this->container)) {
@@ -670,6 +672,8 @@ public function getServiceProviders($origin) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function terminate(Request $request, Response $response) {
     // Only run terminate() when essential services have been set up properly
diff --git a/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php b/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php
index c31a404414..ebf0cf8b7c 100644
--- a/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php
+++ b/core/lib/Drupal/Core/Entity/EntityConstraintViolationList.php
@@ -187,6 +187,8 @@ public function getEntity() {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function add(ConstraintViolationInterface $violation) {
     parent::add($violation);
@@ -196,6 +198,8 @@ public function add(ConstraintViolationInterface $violation) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function remove($offset) {
     parent::remove($offset);
@@ -205,6 +209,8 @@ public function remove($offset) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function set($offset, ConstraintViolationInterface $violation) {
     parent::set($offset, $violation);
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php
index 39e99afc5e..f8e3fc7da5 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/BundleConstraintValidator.php
@@ -12,6 +12,8 @@ class BundleConstraintValidator extends ConstraintValidator {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($entity, Constraint $constraint) {
     if (!isset($entity)) {
diff --git a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php
index acb000ad6b..089be609e2 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/Validation/Constraint/EntityTypeConstraintValidator.php
@@ -12,6 +12,8 @@ class EntityTypeConstraintValidator extends ConstraintValidator {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($entity, Constraint $constraint) {
     if (!isset($entity)) {
diff --git a/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php b/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php
index 482f6dffe7..3a0040dc0d 100644
--- a/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php
+++ b/core/lib/Drupal/Core/Render/MetadataBubblingUrlGenerator.php
@@ -49,6 +49,8 @@ public function __construct(UrlGeneratorInterface $url_generator, RendererInterf
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setContext(SymfonyRequestContext $context) {
     $this->urlGenerator->setContext($context);
diff --git a/core/lib/Drupal/Core/Routing/AccessAwareRouter.php b/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
index 0e18492567..be122530f8 100644
--- a/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
+++ b/core/lib/Drupal/Core/Routing/AccessAwareRouter.php
@@ -65,6 +65,8 @@ public function __call($name, $arguments) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setContext(SymfonyRequestContext $context) {
     $this->router->setContext($context);
diff --git a/core/lib/Drupal/Core/Routing/UrlGenerator.php b/core/lib/Drupal/Core/Routing/UrlGenerator.php
index 5e2ccab69d..08d385436f 100644
--- a/core/lib/Drupal/Core/Routing/UrlGenerator.php
+++ b/core/lib/Drupal/Core/Routing/UrlGenerator.php
@@ -96,6 +96,8 @@ public function __construct(RouteProviderInterface $provider, OutboundPathProces
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setContext(SymfonyRequestContext $context) {
     $this->context = $context;
diff --git a/core/lib/Drupal/Core/Session/MetadataBag.php b/core/lib/Drupal/Core/Session/MetadataBag.php
index be0017177a..716cccf542 100644
--- a/core/lib/Drupal/Core/Session/MetadataBag.php
+++ b/core/lib/Drupal/Core/Session/MetadataBag.php
@@ -51,6 +51,8 @@ public function getCsrfTokenSeed() {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function stampNew($lifetime = NULL) {
     parent::stampNew($lifetime);
diff --git a/core/lib/Drupal/Core/TypedData/Validation/ConstraintViolationBuilder.php b/core/lib/Drupal/Core/TypedData/Validation/ConstraintViolationBuilder.php
index 0503925226..8af74633cc 100644
--- a/core/lib/Drupal/Core/TypedData/Validation/ConstraintViolationBuilder.php
+++ b/core/lib/Drupal/Core/TypedData/Validation/ConstraintViolationBuilder.php
@@ -214,6 +214,8 @@ public function setCause($cause): static
 
     /**
      * {@inheritdoc}
+     *
+     * @return void
      */
     public function addViolation()
     {
diff --git a/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php b/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php
index cc4b8b668e..42e669c375 100644
--- a/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php
+++ b/core/lib/Drupal/Core/TypedData/Validation/ExecutionContext.php
@@ -156,6 +156,8 @@ public function setConstraint(Constraint $constraint): void {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function addViolation($message, array $parameters = []) {
     $this->violations->add(new ConstraintViolation($this->translator->trans($message, $parameters, $this->translationDomain), $message, $parameters, $this->root, $this->propertyPath, $this->value, NULL, NULL, $this->constraint));
diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NotNullConstraintValidator.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NotNullConstraintValidator.php
index 6d423e4a59..3ff5f04154 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NotNullConstraintValidator.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/NotNullConstraintValidator.php
@@ -19,6 +19,8 @@ class NotNullConstraintValidator extends NotNullValidator {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($value, Constraint $constraint) {
     $typed_data = $this->getTypedData();
diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
index be11f80049..1484a90372 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
@@ -24,6 +24,8 @@ class PrimitiveTypeConstraintValidator extends ConstraintValidator {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($value, Constraint $constraint) {
 
diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/RangeConstraintValidator.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/RangeConstraintValidator.php
index f78a29fbd8..3ce2a2a183 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/RangeConstraintValidator.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/RangeConstraintValidator.php
@@ -14,6 +14,8 @@ class RangeConstraintValidator extends ConstraintValidator {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($value, Constraint $constraint) {
     if (!$constraint instanceof Range) {
diff --git a/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php b/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php
index 16ccae0fc7..36018286cc 100644
--- a/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php
+++ b/core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php
@@ -41,6 +41,8 @@ public static function create(ContainerInterface $container) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($value, Constraint $constraint) {
     if (isset($value)) {
diff --git a/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php b/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php
index dd3dd9a107..c28f46c205 100644
--- a/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php
+++ b/core/modules/serialization/src/RegisterSerializationClassesCompilerPass.php
@@ -16,6 +16,8 @@ class RegisterSerializationClassesCompilerPass implements CompilerPassInterface
    *
    * @param \Symfony\Component\DependencyInjection\ContainerBuilder $container
    *   The container to process.
+   *
+   * @return void
    */
   public function process(ContainerBuilder $container) {
     $definition = $container->getDefinition('serializer');
diff --git a/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php b/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php
index 1a65aba978..80b1b7dacb 100644
--- a/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php
+++ b/core/modules/user/src/Plugin/Validation/Constraint/ProtectedUserFieldConstraintValidator.php
@@ -53,6 +53,8 @@ public static function create(ContainerInterface $container) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($items, Constraint $constraint) {
     if (!isset($items)) {
diff --git a/core/modules/user/src/Plugin/Validation/Constraint/UserMailRequiredValidator.php b/core/modules/user/src/Plugin/Validation/Constraint/UserMailRequiredValidator.php
index b40ce9bb57..f85a5847e9 100644
--- a/core/modules/user/src/Plugin/Validation/Constraint/UserMailRequiredValidator.php
+++ b/core/modules/user/src/Plugin/Validation/Constraint/UserMailRequiredValidator.php
@@ -16,6 +16,8 @@ class UserMailRequiredValidator extends ConstraintValidator {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function validate($items, Constraint $constraint) {
     /** @var \Drupal\Core\Field\FieldItemListInterface $items */
diff --git a/core/tests/Drupal/Tests/Core/DependencyInjection/DependencySerializationTest.php b/core/tests/Drupal/Tests/Core/DependencyInjection/DependencySerializationTest.php
index 0f660717ca..c247629020 100644
--- a/core/tests/Drupal/Tests/Core/DependencyInjection/DependencySerializationTest.php
+++ b/core/tests/Drupal/Tests/Core/DependencyInjection/DependencySerializationTest.php
@@ -79,6 +79,8 @@ public function __construct(\stdClass $service) {
 
   /**
    * {@inheritdoc}
+   *
+   * @return void
    */
   public function setContainer(ContainerInterface $container = NULL) {
     $this->container = $container;