30 files declare their use of DrupalKernel in Zircon Profile 8

authorize.php in core/authorize.php

Administrative script for running authorized file operations.

BrowserTestBase.php in core/modules/simpletest/src/BrowserTestBase.php

Contains \Drupal\simpletest\BrowserTestBase.

db-tools.php in core/scripts/db-tools.php

DiscoverServiceProvidersTest.php in core/tests/Drupal/Tests/Core/DrupalKernel/DiscoverServiceProvidersTest.php

Contains \Drupal\Tests\Core\DrupalKernel\DiscoverServiceProvidersTest.

DrupalKernelTest.php in core/tests/Drupal/Tests/Core/DrupalKernel/DrupalKernelTest.php

Contains \Drupal\Tests\Core\DrupalKernel\DrupalKernelTest.

DrupalKernelTest.php in core/modules/system/src/Tests/DrupalKernel/DrupalKernelTest.php

Contains \Drupal\system\Tests\DrupalKernel\DrupalKernelTest.

dump-database-d8-mysql.php in core/scripts/dump-database-d8-mysql.php

ExtensionDiscovery.php in core/lib/Drupal/Core/Extension/ExtensionDiscovery.php

Contains \Drupal\Core\Extension\ExtensionDiscovery.

generate-proxy-class.php in core/scripts/generate-proxy-class.php

IgnoreReplicaSubscriberTest.php in core/modules/system/src/Tests/System/IgnoreReplicaSubscriberTest.php

Contains \Drupal\system\Tests\System\IgnoreReplicaSubscriberTest.

index.php in ./index.php

The PHP page that serves all page requests on a Drupal installation.

install.core.inc in core/includes/install.core.inc

API functions for installing Drupal.

InstallerExistingSettingsNoProfileTest.php in core/modules/system/src/Tests/Installer/InstallerExistingSettingsNoProfileTest.php

Contains \Drupal\system\Tests\Installer\InstallerExistingSettingsNoProfileTest.

InstallerExistingSettingsTest.php in core/modules/system/src/Tests/Installer/InstallerExistingSettingsTest.php

Contains \Drupal\system\Tests\Installer\InstallerExistingSettingsTest.

InstallerKernel.php in core/lib/Drupal/Core/Installer/InstallerKernel.php

Contains \Drupal\Core\Installer\InstallerKernel.

InstallerTestBase.php in core/modules/simpletest/src/InstallerTestBase.php

Contains \Drupal\simpletest\InstallerTestBase.

KernelTestBase.php in core/tests/Drupal/KernelTests/KernelTestBase.php

Contains \Drupal\KernelTests\KernelTestBase.

KernelTestBase.php in core/modules/simpletest/src/KernelTestBase.php

Contains \Drupal\simpletest\KernelTestBase.

PublicStream.php in core/lib/Drupal/Core/StreamWrapper/PublicStream.php

Contains \Drupal\Core\StreamWrapper\PublicStream.

rebuild.php in core/rebuild.php

Rebuilds all Drupal caches even when Drupal itself does not work.

statistics.php in core/modules/statistics/statistics.php

Handles counts of node views via AJAX with minimal bootstrap.

StreamWrapperTest.php in core/modules/system/src/Tests/File/StreamWrapperTest.php

Contains \Drupal\system\Tests\File\StreamWrapperTest.

system.install in core/modules/system/system.install

Install, update and uninstall functions for the system module.

TestKernel.php in core/lib/Drupal/Core/Test/TestKernel.php

Contains \Drupal\Core\Test\TestKernel.

TestRunnerKernel.php in core/lib/Drupal/Core/Test/TestRunnerKernel.php

Contains \Drupal\Core\Test\TestRunnerKernel.

UpdateKernel.php in core/lib/Drupal/Core/Update/UpdateKernel.php

Contains \Drupal\Core\Update\UpdateKernel.

UpdateTestBase.php in core/modules/update/src/Tests/UpdateTestBase.php

Contains \Drupal\update\Tests\UpdateTestBase.

utility.inc in core/includes/utility.inc

Miscellaneous functions.

ValidateHostnameTest.php in core/tests/Drupal/Tests/Core/DrupalKernel/ValidateHostnameTest.php

Contains \Drupal\Tests\Core\DrupalKernel\ValidateHostnameTest.

WebTestBase.php in core/modules/simpletest/src/WebTestBase.php

Contains \Drupal\simpletest\WebTestBase.