diff --git a/automatic_updates.module b/automatic_updates.module
index 22bbd964a2ab671de39ceb763c22d5ae940a79a9..1a375a68fb9b01cad063e40aa126bf39f7d67f7c 100644
--- a/automatic_updates.module
+++ b/automatic_updates.module
@@ -6,15 +6,11 @@
  */
 
 use Drupal\automatic_updates\BatchProcessor;
-use Drupal\automatic_updates\ProjectInfo;
 use Drupal\Core\Routing\RouteMatchInterface;
-use Drupal\automatic_updates\CronUpdater;
 use Drupal\automatic_updates\Validation\AdminReadinessMessages;
-use Drupal\Core\Extension\ExtensionVersion;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Url;
 use Drupal\system\Controller\DbUpdateController;
-use Drupal\update\ProjectSecurityData;
 
 /**
  * Implements hook_help().
@@ -144,52 +140,6 @@ function automatic_updates_form_update_manager_update_form_alter(&$form, FormSta
   }
 }
 
-/**
- * Implements hook_form_FORM_ID_alter() for 'update_settings' form.
- */
-function automatic_updates_form_update_settings_alter(array &$form, FormStateInterface $form_state, string $form_id) {
-  $project_info = new ProjectInfo('drupal');
-  $version = ExtensionVersion::createFromVersionString($project_info->getInstalledVersion());
-  $current_minor = $version->getMajorVersion() . '.' . $version->getMinorVersion();
-  // @todo In https://www.drupal.org/node/2998285 use the update XML to
-  //   determine when the installed of core will become unsupported.
-  $supported_until_version = $version->getMajorVersion() . '.'
-      . ((int) $version->getMinorVersion() + ProjectSecurityData::CORE_MINORS_WITH_SECURITY_COVERAGE)
-      . '.0';
-
-  $form['automatic_updates_cron'] = [
-    '#type' => 'radios',
-    '#title' => t('Automatically update Drupal core'),
-    '#options' => [
-      CronUpdater::DISABLED => t('Disabled'),
-      CronUpdater::ALL => t('All supported updates'),
-      CronUpdater::SECURITY => t('Security updates only'),
-    ],
-    '#default_value' => \Drupal::config('automatic_updates.settings')->get('cron'),
-    '#description' => t(
-      'If enabled, Drupal core will be automatically updated when an update is available. Automatic updates are only supported for @current_minor.x versions of Drupal core. Drupal @current_minor will receive security updates until @supported_until_version is released.',
-      [
-        '@current_minor' => $current_minor,
-        '@supported_until_version' => $supported_until_version,
-      ]
-    ),
-  ];
-  $form += [
-    '#submit' => ['::submitForm'],
-  ];
-  $form['#submit'][] = '_automatic_updates_update_settings_form_submit';
-}
-
-/**
- * Submit function for the 'update_settings' form.
- */
-function _automatic_updates_update_settings_form_submit(array &$form, FormStateInterface $form_state) {
-  \Drupal::configFactory()
-    ->getEditable('automatic_updates.settings')
-    ->set('cron', $form_state->getValue('automatic_updates_cron'))
-    ->save();
-}
-
 /**
  * Implements hook_local_tasks_alter().
  */
diff --git a/automatic_updates.services.yml b/automatic_updates.services.yml
index 97c49946479e19c87e9f783fac73b4a80f9a0f01..467b7192598d8b56e88f29649c3eee54000e1dcf 100644
--- a/automatic_updates.services.yml
+++ b/automatic_updates.services.yml
@@ -11,7 +11,6 @@ services:
       - '@event_dispatcher'
       - '@automatic_updates.updater'
       - '@automatic_updates.cron_updater'
-      - '@config.factory'
       - 24
     tags:
       - { name: event_subscriber }
@@ -119,6 +118,7 @@ services:
       - '@state'
       - '@datetime.time'
       - '@string_translation'
+      - '@automatic_updates.cron_updater'
     tags:
       - { name: event_subscriber }
   automatic_updates.validator.staged_database_updates:
@@ -134,6 +134,6 @@ services:
     tags:
       - { name: event_subscriber }
   automatic_updates.validator.target_release:
-    class: \Drupal\automatic_updates\Validator\UpdateReleaseValidator
+    class: Drupal\automatic_updates\Validator\UpdateReleaseValidator
     tags:
       - { name: event_subscriber }
diff --git a/src/CronUpdater.php b/src/CronUpdater.php
index 7f6400c6c5d2bafd2914006bd40d0e68b1c6dcac..34bd9fa608f9be1da3d75f4d87f028e6df6ea418 100644
--- a/src/CronUpdater.php
+++ b/src/CronUpdater.php
@@ -14,6 +14,15 @@ use Drupal\package_manager\Exception\StageValidationException;
  */
 class CronUpdater extends Updater {
 
+  /**
+   * Whether or not cron updates are hard-disabled.
+   *
+   * @var bool
+   *
+   * @todo Remove this when TUF integration is stable.
+   */
+  private static $disabled = TRUE;
+
   /**
    * All automatic updates are disabled.
    *
@@ -69,7 +78,7 @@ class CronUpdater extends Updater {
    * Handles updates during cron.
    */
   public function handleCron(): void {
-    if ($this->isDisabled()) {
+    if ($this->getMode() === static::DISABLED) {
       return;
     }
 
@@ -134,13 +143,25 @@ class CronUpdater extends Updater {
   }
 
   /**
-   * Determines if cron updates are disabled.
+   * Gets the cron update mode.
+   *
+   * @return string
+   *   The cron update mode. Will be one of the following constants:
+   *   - \Drupal\automatic_updates\CronUpdater::DISABLED if updates during cron
+   *     are entirely disabled.
+   *   - \Drupal\automatic_updates\CronUpdater::SECURITY only security updates
+   *     can be done during cron.
+   *   - \Drupal\automatic_updates\CronUpdater::ALL if all updates are allowed
+   *     during cron.
    *
-   * @return bool
-   *   TRUE if cron updates are disabled, otherwise FALSE.
+   * @todo Make this always return a string, with a sensible default, in
+   *   https://www.drupal.org/i/3276534.
    */
-  private function isDisabled(): bool {
-    return $this->configFactory->get('automatic_updates.settings')->get('cron') === static::DISABLED;
+  final public function getMode(): ?string {
+    if (self::$disabled) {
+      return static::DISABLED;
+    }
+    return $this->configFactory->get('automatic_updates.settings')->get('cron');
   }
 
 }
diff --git a/src/Validation/AdminReadinessMessages.php b/src/Validation/AdminReadinessMessages.php
index 4febff50046aa698a32288b362f5be950675f221..82084f29ce0e89fa1aa171c9e9b8cd76b63b4cdc 100644
--- a/src/Validation/AdminReadinessMessages.php
+++ b/src/Validation/AdminReadinessMessages.php
@@ -3,7 +3,6 @@
 namespace Drupal\automatic_updates\Validation;
 
 use Drupal\automatic_updates\CronUpdater;
-use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
 use Drupal\Core\Messenger\MessengerInterface;
 use Drupal\Core\Messenger\MessengerTrait;
@@ -60,11 +59,11 @@ final class AdminReadinessMessages implements ContainerInjectionInterface {
   protected $currentRouteMatch;
 
   /**
-   * The config factory service.
+   * The cron updater service.
    *
-   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   * @var \Drupal\automatic_updates\CronUpdater
    */
-  protected $config;
+  protected $cronUpdater;
 
   /**
    * Constructs a ReadinessRequirement object.
@@ -81,17 +80,17 @@ final class AdminReadinessMessages implements ContainerInjectionInterface {
    *   The translation service.
    * @param \Drupal\Core\Routing\CurrentRouteMatch $current_route_match
    *   The current route match.
-   * @param \Drupal\Core\Config\ConfigFactoryInterface $config
-   *   The config factory service.
+   * @param \Drupal\automatic_updates\CronUpdater $cron_updater
+   *   The cron updater service.
    */
-  public function __construct(ReadinessValidationManager $readiness_checker_manager, MessengerInterface $messenger, AdminContext $admin_context, AccountProxyInterface $current_user, TranslationInterface $translation, CurrentRouteMatch $current_route_match, ConfigFactoryInterface $config) {
+  public function __construct(ReadinessValidationManager $readiness_checker_manager, MessengerInterface $messenger, AdminContext $admin_context, AccountProxyInterface $current_user, TranslationInterface $translation, CurrentRouteMatch $current_route_match, CronUpdater $cron_updater) {
     $this->readinessCheckerManager = $readiness_checker_manager;
     $this->setMessenger($messenger);
     $this->adminContext = $admin_context;
     $this->currentUser = $current_user;
     $this->setStringTranslation($translation);
     $this->currentRouteMatch = $current_route_match;
-    $this->config = $config;
+    $this->cronUpdater = $cron_updater;
   }
 
   /**
@@ -105,7 +104,7 @@ final class AdminReadinessMessages implements ContainerInjectionInterface {
       $container->get('current_user'),
       $container->get('string_translation'),
       $container->get('current_route_match'),
-      $container->get('config.factory')
+      $container->get('automatic_updates.cron_updater')
     );
   }
 
@@ -142,7 +141,7 @@ final class AdminReadinessMessages implements ContainerInjectionInterface {
   protected function displayResultsOnCurrentPage(): bool {
     // If updates will not run during cron then we don't need to show the
     // readiness checks on admin pages.
-    if ($this->config->get('automatic_updates.settings')->get('cron') === CronUpdater::DISABLED) {
+    if ($this->cronUpdater->getMode() === CronUpdater::DISABLED) {
       return FALSE;
     }
 
diff --git a/src/Validation/ReadinessValidationManager.php b/src/Validation/ReadinessValidationManager.php
index 08e50d6f8e73b8e544574a3157da57b026dceeb9..f6292bd5cd3db999edf766c5d46814154475cda6 100644
--- a/src/Validation/ReadinessValidationManager.php
+++ b/src/Validation/ReadinessValidationManager.php
@@ -6,7 +6,6 @@ use Drupal\automatic_updates\CronUpdater;
 use Drupal\automatic_updates\Event\ReadinessCheckEvent;
 use Drupal\automatic_updates\Updater;
 use Drupal\Component\Datetime\TimeInterface;
-use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\KeyValueStore\KeyValueExpirableFactoryInterface;
 use Drupal\package_manager\Event\PostApplyEvent;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
@@ -60,13 +59,6 @@ class ReadinessValidationManager implements EventSubscriberInterface {
    */
   protected $cronUpdater;
 
-  /**
-   * The config factory service.
-   *
-   * @var \Drupal\Core\Config\ConfigFactoryInterface
-   */
-  protected $config;
-
   /**
    * Constructs a ReadinessValidationManager.
    *
@@ -80,18 +72,15 @@ class ReadinessValidationManager implements EventSubscriberInterface {
    *   The updater service.
    * @param \Drupal\automatic_updates\CronUpdater $cron_updater
    *   The cron updater service.
-   * @param \Drupal\Core\Config\ConfigFactoryInterface $config
-   *   The config factory service.
    * @param int $results_time_to_live
    *   The number of hours to store results.
    */
-  public function __construct(KeyValueExpirableFactoryInterface $key_value_expirable_factory, TimeInterface $time, EventDispatcherInterface $dispatcher, Updater $updater, CronUpdater $cron_updater, ConfigFactoryInterface $config, int $results_time_to_live) {
+  public function __construct(KeyValueExpirableFactoryInterface $key_value_expirable_factory, TimeInterface $time, EventDispatcherInterface $dispatcher, Updater $updater, CronUpdater $cron_updater, int $results_time_to_live) {
     $this->keyValueExpirable = $key_value_expirable_factory->get('automatic_updates');
     $this->time = $time;
     $this->eventDispatcher = $dispatcher;
     $this->updater = $updater;
     $this->cronUpdater = $cron_updater;
-    $this->config = $config;
     $this->resultsTimeToLive = $results_time_to_live;
   }
 
@@ -104,7 +93,7 @@ class ReadinessValidationManager implements EventSubscriberInterface {
     // If updates will run during cron, use the cron updater service provided by
     // this module. This will allow subscribers to ReadinessCheckEvent to run
     // specific validation for conditions that only affect cron updates.
-    if ($this->config->get('automatic_updates.settings')->get('cron') === CronUpdater::DISABLED) {
+    if ($this->cronUpdater->getMode() === CronUpdater::DISABLED) {
       $stage = $this->updater;
     }
     else {
diff --git a/src/Validator/CronFrequencyValidator.php b/src/Validator/CronFrequencyValidator.php
index 353722b7ce9828ea4f823917f58e697fd6fced34..4003a7273e7c036dcc0b7207843a82222f35d49e 100644
--- a/src/Validator/CronFrequencyValidator.php
+++ b/src/Validator/CronFrequencyValidator.php
@@ -75,6 +75,13 @@ class CronFrequencyValidator implements EventSubscriberInterface {
    */
   protected $time;
 
+  /**
+   * The cron updater service.
+   *
+   * @var \Drupal\automatic_updates\CronUpdater
+   */
+  protected $cronUpdater;
+
   /**
    * CronFrequencyValidator constructor.
    *
@@ -88,13 +95,16 @@ class CronFrequencyValidator implements EventSubscriberInterface {
    *   The time service.
    * @param \Drupal\Core\StringTranslation\TranslationInterface $translation
    *   The translation service.
+   * @param \Drupal\automatic_updates\CronUpdater $cron_updater
+   *   The cron updater service.
    */
-  public function __construct(ConfigFactoryInterface $config_factory, ModuleHandlerInterface $module_handler, StateInterface $state, TimeInterface $time, TranslationInterface $translation) {
+  public function __construct(ConfigFactoryInterface $config_factory, ModuleHandlerInterface $module_handler, StateInterface $state, TimeInterface $time, TranslationInterface $translation, CronUpdater $cron_updater) {
     $this->configFactory = $config_factory;
     $this->moduleHandler = $module_handler;
     $this->state = $state;
     $this->time = $time;
     $this->setStringTranslation($translation);
+    $this->cronUpdater = $cron_updater;
   }
 
   /**
@@ -104,12 +114,9 @@ class CronFrequencyValidator implements EventSubscriberInterface {
    *   The event object.
    */
   public function checkCronFrequency(ReadinessCheckEvent $event): void {
-    $cron_enabled = $this->configFactory->get('automatic_updates.settings')
-      ->get('cron');
-
     // If automatic updates are disabled during cron, there's nothing we need
     // to validate.
-    if ($cron_enabled === CronUpdater::DISABLED) {
+    if ($this->cronUpdater->getMode() === CronUpdater::DISABLED) {
       return;
     }
     elseif ($this->moduleHandler->moduleExists('automated_cron')) {
diff --git a/src/Validator/CronUpdateVersionValidator.php b/src/Validator/CronUpdateVersionValidator.php
index 8e167336b603eb96eec40140b7e13a770213d0d8..e5af7e9d839e059caf068b3f3f103553e6182695 100644
--- a/src/Validator/CronUpdateVersionValidator.php
+++ b/src/Validator/CronUpdateVersionValidator.php
@@ -91,10 +91,14 @@ final class CronUpdateVersionValidator extends UpdateVersionValidator {
       ]);
     }
 
+    // We cannot use dependency injection to get the cron updater because that
+    // would create a circular service dependency.
+    $level = \Drupal::service('automatic_updates.cron_updater')
+      ->getMode();
+
     // If both the from and to version numbers are valid check if the current
     // settings only allow security updates during cron and if so ensure the
     // update release is a security release.
-    $level = $this->configFactory->get('automatic_updates.settings')->get('cron');
     if ($level === CronUpdater::SECURITY) {
       $releases = (new ProjectInfo('drupal'))->getInstallableReleases();
       // @todo Remove this check and add validation to
diff --git a/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.info.yml b/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.info.yml
new file mode 100644
index 0000000000000000000000000000000000000000..9d5d25b7936af8aec6caa188f621ba3f73a7fc3c
--- /dev/null
+++ b/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.info.yml
@@ -0,0 +1,4 @@
+name: 'Automatic Updates Test: Cron'
+type: module
+description: 'Enables cron updates for testing purposes.'
+package: Testing
diff --git a/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.module b/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.module
new file mode 100644
index 0000000000000000000000000000000000000000..34842fcf68ebf7479fc97316b546bead936c333e
--- /dev/null
+++ b/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.module
@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * @file
+ * Contains hook implementations to enable automatic updates during cron.
+ *
+ * @todo Move into automatic_updates when TUF integration is stable.
+ */
+
+use Drupal\automatic_updates\ProjectInfo;
+use Drupal\automatic_updates\CronUpdater;
+use Drupal\Core\Extension\ExtensionVersion;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\update\ProjectSecurityData;
+
+/**
+ * Implements hook_form_FORM_ID_alter() for 'update_settings' form.
+ */
+function automatic_updates_test_cron_form_update_settings_alter(array &$form, FormStateInterface $form_state, string $form_id) {
+  $project_info = new ProjectInfo('drupal');
+  $version = ExtensionVersion::createFromVersionString($project_info->getInstalledVersion());
+  $current_minor = $version->getMajorVersion() . '.' . $version->getMinorVersion();
+  // @todo In https://www.drupal.org/node/2998285 use the update XML to
+  //   determine when the installed of core will become unsupported.
+  $supported_until_version = $version->getMajorVersion() . '.'
+    . ((int) $version->getMinorVersion() + ProjectSecurityData::CORE_MINORS_WITH_SECURITY_COVERAGE)
+    . '.0';
+
+  $form['automatic_updates_cron'] = [
+    '#type' => 'radios',
+    '#title' => t('Automatically update Drupal core'),
+    '#options' => [
+      CronUpdater::DISABLED => t('Disabled'),
+      CronUpdater::ALL => t('All supported updates'),
+      CronUpdater::SECURITY => t('Security updates only'),
+    ],
+    '#default_value' => \Drupal::config('automatic_updates.settings')->get('cron'),
+    '#description' => t(
+      'If enabled, Drupal core will be automatically updated when an update is available. Automatic updates are only supported for @current_minor.x versions of Drupal core. Drupal @current_minor will receive security updates until @supported_until_version is released.',
+      [
+        '@current_minor' => $current_minor,
+        '@supported_until_version' => $supported_until_version,
+      ]
+    ),
+  ];
+  $form += [
+    '#submit' => ['::submitForm'],
+  ];
+  $form['#submit'][] = '_automatic_updates_test_cron_update_settings_form_submit';
+}
+
+/**
+ * Submit function for the 'update_settings' form.
+ */
+function _automatic_updates_test_cron_update_settings_form_submit(array &$form, FormStateInterface $form_state) {
+  \Drupal::configFactory()
+    ->getEditable('automatic_updates.settings')
+    ->set('cron', $form_state->getValue('automatic_updates_cron'))
+    ->save();
+}
diff --git a/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.services.yml b/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.services.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b8e5c8bddd186e92e48c0e97d230ff0323b16a4f
--- /dev/null
+++ b/tests/modules/automatic_updates_test_cron/automatic_updates_test_cron.services.yml
@@ -0,0 +1,5 @@
+services:
+  automatic_updates_test_cron.enabler:
+    class: Drupal\automatic_updates_test_cron\Enabler
+    tags:
+      - { name: event_subscriber }
diff --git a/tests/modules/automatic_updates_test_cron/src/Enabler.php b/tests/modules/automatic_updates_test_cron/src/Enabler.php
new file mode 100644
index 0000000000000000000000000000000000000000..e7cb069df4cf9a9ad4b32e895c850862ad3eae47
--- /dev/null
+++ b/tests/modules/automatic_updates_test_cron/src/Enabler.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Drupal\automatic_updates_test_cron;
+
+use Drupal\automatic_updates\CronUpdater;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+/**
+ * Enables automatic updates during cron.
+ *
+ * @todo Remove this when TUF integration is stable.
+ */
+class Enabler implements EventSubscriberInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    return [
+      KernelEvents::REQUEST => 'enableCron',
+    ];
+  }
+
+  /**
+   * Enables automatic updates during cron.
+   */
+  public function enableCron(): void {
+    if (class_exists(CronUpdater::class)) {
+      $reflector = new \ReflectionClass(CronUpdater::class);
+      $reflector = $reflector->getProperty('disabled');
+      $reflector->setAccessible(TRUE);
+      $reflector->setValue(NULL, FALSE);
+    }
+  }
+
+}
diff --git a/tests/src/Build/UpdateTestBase.php b/tests/src/Build/UpdateTestBase.php
index cb93d1dcf6ba3a209b8f9808f4d1650ef3632450..f80214db3f0f8b17bd11f0899b6a3dcc37361336 100644
--- a/tests/src/Build/UpdateTestBase.php
+++ b/tests/src/Build/UpdateTestBase.php
@@ -39,6 +39,7 @@ abstract class UpdateTestBase extends TemplateProjectTestBase {
     $this->installModules([
       'automatic_updates',
       'automatic_updates_test',
+      'automatic_updates_test_cron',
       'automatic_updates_test_release_history',
     ]);
   }
diff --git a/tests/src/Functional/AutomaticUpdatesFunctionalTestBase.php b/tests/src/Functional/AutomaticUpdatesFunctionalTestBase.php
index 1a17142fdc58e30ac9e244a78d8812e1686b8ae3..f23bbee42c0ededbb6bae92c94dc96c9b082b59f 100644
--- a/tests/src/Functional/AutomaticUpdatesFunctionalTestBase.php
+++ b/tests/src/Functional/AutomaticUpdatesFunctionalTestBase.php
@@ -15,6 +15,7 @@ abstract class AutomaticUpdatesFunctionalTestBase extends BrowserTestBase {
    * {@inheritdoc}
    */
   protected static $modules = [
+    'automatic_updates_test_cron',
     'automatic_updates_test_disable_validators',
     'package_manager_bypass',
   ];
diff --git a/tests/src/Kernel/AutomaticUpdatesKernelTestBase.php b/tests/src/Kernel/AutomaticUpdatesKernelTestBase.php
index de10b117ad5a1fe666ad9448541db62db22f72f6..da4da98abcc0a2a7ddf099008e1f8d824e31e539 100644
--- a/tests/src/Kernel/AutomaticUpdatesKernelTestBase.php
+++ b/tests/src/Kernel/AutomaticUpdatesKernelTestBase.php
@@ -24,7 +24,12 @@ abstract class AutomaticUpdatesKernelTestBase extends PackageManagerKernelTestBa
   /**
    * {@inheritdoc}
    */
-  protected static $modules = ['system', 'update', 'update_test'];
+  protected static $modules = [
+    'automatic_updates_test_cron',
+    'system',
+    'update',
+    'update_test',
+  ];
 
   /**
    * The mocked HTTP client that returns metadata about available updates.
@@ -68,6 +73,9 @@ abstract class AutomaticUpdatesKernelTestBase extends PackageManagerKernelTestBa
     // from a sane state.
     // @see \Drupal\automatic_updates\Validator\CronFrequencyValidator
     $this->container->get('state')->set('system.cron_last', time());
+
+    // @todo Remove this when TUF integration is stable.
+    $this->container->get('automatic_updates_test_cron.enabler')->enableCron();
   }
 
   /**
diff --git a/tests/src/Kernel/ReadinessValidation/CronFrequencyValidatorTest.php b/tests/src/Kernel/ReadinessValidation/CronFrequencyValidatorTest.php
index e44cc77e34349d2377804a98089fb8a16f33c161..47d15ae228e98c103abcc43dad73cabf58737685 100644
--- a/tests/src/Kernel/ReadinessValidation/CronFrequencyValidatorTest.php
+++ b/tests/src/Kernel/ReadinessValidation/CronFrequencyValidatorTest.php
@@ -34,7 +34,8 @@ class CronFrequencyValidatorTest extends AutomaticUpdatesKernelTestBase {
       $this->container->get('module_handler'),
       $this->container->get('state'),
       $this->container->get('datetime.time'),
-      $this->container->get('string_translation')
+      $this->container->get('string_translation'),
+      $this->container->get('automatic_updates.cron_updater')
     ) extends CronFrequencyValidator {
 
       /**