diff --git a/modules/dgi_migrate_big_set_overrides/README.md b/modules/dgi_migrate_big_set_overrides/README.md
index 280ff4b6..b792e444 100644
--- a/modules/dgi_migrate_big_set_overrides/README.md
+++ b/modules/dgi_migrate_big_set_overrides/README.md
@@ -22,6 +22,11 @@ Big Set Overrides is responsible for doing a few main things:
 2. Disables the `repository_item_media_content_sync_helper_export` context so that `content_sync` doesn't export any media during the migration.
 3. Disables the default Solr index, so items are not immediately indexed upon ingest.
 4. Disables the `path_alias` title generation.
+5. Unsets these `content_sync` hook implementations when present so
+   `content_sync` doesn't continuously track entities during the migration:
+   * `entity_update`
+   * `entity_insert`
+   * `entity_delete`
 
 ## Installation
 
diff --git a/modules/dgi_migrate_big_set_overrides/dgi_migrate_big_set_overrides.module b/modules/dgi_migrate_big_set_overrides/dgi_migrate_big_set_overrides.module
new file mode 100644
index 00000000..81a84039
--- /dev/null
+++ b/modules/dgi_migrate_big_set_overrides/dgi_migrate_big_set_overrides.module
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * @file
+ * General hook implementations.
+ */
+
+/**
+ * Implements hook_module_implements_alter().
+ */
+function dgi_migrate_big_set_overrides_module_implements_alter(&$implementations, $hook) {
+  // Don't let these content_sync hook implementations run because it slows
+  // down large ingests like site migrations.
+  $content_sync_hooks_to_unset = [
+    'entity_update',
+    'entity_insert',
+    'entity_delete',
+  ];
+
+  // Unset the identified content_sync hook implementations when they exist.
+  if (
+    array_key_exists('content_sync', $implementations)
+    && in_array($hook, $content_sync_hooks_to_unset)
+  ) {
+    unset($implementations['content_sync']);
+  }
+}
diff --git a/modules/dgi_migrate_big_set_overrides/src/Config/Overrides.php b/modules/dgi_migrate_big_set_overrides/src/Config/Overrides.php
index 2346053d..abaf7ee2 100644
--- a/modules/dgi_migrate_big_set_overrides/src/Config/Overrides.php
+++ b/modules/dgi_migrate_big_set_overrides/src/Config/Overrides.php
@@ -33,7 +33,7 @@ class Overrides implements ConfigFactoryOverrideInterface {
    * Constructor.
    */
   public function __construct(
-    ConfigFactoryInterface $config_factory
+    ConfigFactoryInterface $config_factory,
   ) {
     $this->config = $config_factory->getEditable(static::CONFIG);
     // XXX: Appears to be NULL on module installation; however, the requests
diff --git a/modules/dgi_migrate_dspace/src/Commands/DspaceCommands.php b/modules/dgi_migrate_dspace/src/Commands/DspaceCommands.php
index a70049f3..afb6c6bf 100644
--- a/modules/dgi_migrate_dspace/src/Commands/DspaceCommands.php
+++ b/modules/dgi_migrate_dspace/src/Commands/DspaceCommands.php
@@ -38,7 +38,7 @@ class DspaceCommands extends DrushCommands {
    */
   public function __construct(
     MigrationPluginManagerInterface $migration_plugin_manager,
-    EntityTypeManagerInterface $entity_type_manager
+    EntityTypeManagerInterface $entity_type_manager,
   ) {
     $this->migrationPluginManager = $migration_plugin_manager;
     $this->entityTypeManager = $entity_type_manager;
diff --git a/modules/dgi_migrate_foxml_standard_mods/src/Plugin/migrate/process/FoxmlFile.php b/modules/dgi_migrate_foxml_standard_mods/src/Plugin/migrate/process/FoxmlFile.php
index a3b16a68..dc723853 100644
--- a/modules/dgi_migrate_foxml_standard_mods/src/Plugin/migrate/process/FoxmlFile.php
+++ b/modules/dgi_migrate_foxml_standard_mods/src/Plugin/migrate/process/FoxmlFile.php
@@ -51,7 +51,7 @@ public function __construct(
   /**
    * {@inheritDoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, ?MigrationInterface $migration = NULL) {
     $configuration['method'] ??= getenv('DGI_MIGRATE_FOXML_STANDARD_MODS_FILE_METHOD') ?: 'copy';
     assert(in_array($configuration['method'], ['copy', 'direct']));
     /** @var \Drupal\migrate\Plugin\MigratePluginManagerInterface $process_plugin_manager */
diff --git a/modules/dgi_migrate_foxml_standard_mods/tests/src/Unit/RoleMapperTest.php b/modules/dgi_migrate_foxml_standard_mods/tests/src/Unit/RoleMapperTest.php
index 5f76bef1..ba638ccb 100644
--- a/modules/dgi_migrate_foxml_standard_mods/tests/src/Unit/RoleMapperTest.php
+++ b/modules/dgi_migrate_foxml_standard_mods/tests/src/Unit/RoleMapperTest.php
@@ -2,8 +2,8 @@
 
 namespace Drupal\Tests\dgi_migrate_foxml_standard_mods\Unit;
 
-use Drupal\dgi_migrate_foxml_standard_mods\Plugin\migrate\process\TypedRelation;
 use Drupal\Tests\UnitTestCase;
+use Drupal\dgi_migrate_foxml_standard_mods\Plugin\migrate\process\TypedRelation;
 
 /**
  * Test out the role mapper.
diff --git a/modules/dgi_migrate_imagemagick_cleanup/src/EventSubscriber/EventSubscriber.php b/modules/dgi_migrate_imagemagick_cleanup/src/EventSubscriber/EventSubscriber.php
index 9f38f684..98ef8592 100644
--- a/modules/dgi_migrate_imagemagick_cleanup/src/EventSubscriber/EventSubscriber.php
+++ b/modules/dgi_migrate_imagemagick_cleanup/src/EventSubscriber/EventSubscriber.php
@@ -73,7 +73,7 @@ public function __construct(
     LoggerInterface $logger,
     FileSystemInterface $file_system,
     StreamWrapperManagerInterface $stream_wrapper_manager,
-    EventDispatcherInterface $event_dispatcher
+    EventDispatcherInterface $event_dispatcher,
   ) {
     $this->logger = $logger;
     $this->fileSystem = $file_system;
diff --git a/modules/dgi_migrate_regenerate_pathauto_aliases/src/Commands/Pathauto.php b/modules/dgi_migrate_regenerate_pathauto_aliases/src/Commands/Pathauto.php
index 9d0dd54d..ece58ebe 100644
--- a/modules/dgi_migrate_regenerate_pathauto_aliases/src/Commands/Pathauto.php
+++ b/modules/dgi_migrate_regenerate_pathauto_aliases/src/Commands/Pathauto.php
@@ -70,9 +70,11 @@ public function __construct(PathautoGeneratorInterface $pathauto_generator, Enti
    * @validate-module-enabled islandora_drush_utils
    * @islandora-drush-utils-user-wrap
    */
-  public function regenerate($options = [
-    'bundle' => 'islandora_object',
-  ]) {
+  public function regenerate(
+    $options = [
+      'bundle' => 'islandora_object',
+    ],
+  ) {
 
     $bundles = $this->entityTypeBundleInfo->getBundleInfo('node');
     if (!isset($bundles[$options['bundle']])) {
diff --git a/src/Drush/Commands/MigrateCommands.php b/src/Drush/Commands/MigrateCommands.php
index 64cf9c7b..8f98c104 100644
--- a/src/Drush/Commands/MigrateCommands.php
+++ b/src/Drush/Commands/MigrateCommands.php
@@ -78,22 +78,25 @@ class MigrateCommands extends MigrateToolsCommands {
    * @throws \Exception
    *   If there are not enough parameters to the command.
    */
-  public function batchImport($migration_names = '', array $options = [
-    'all' => FALSE,
-    'group' => self::REQ,
-    'tag' => self::REQ,
-    'limit' => self::REQ,
-    'feedback' => self::REQ,
-    'idlist' => self::REQ,
-    'idlist-delimiter' => MigrateTools::DEFAULT_ID_LIST_DELIMITER,
-    'update' => FALSE,
-    'force' => FALSE,
-    'continue-on-failure' => FALSE,
-    'execute-dependencies' => FALSE,
-    'skip-progress-bar' => FALSE,
-    'sync' => FALSE,
-    'run' => NULL,
-  ]) : void {
+  public function batchImport(
+    $migration_names = '',
+    array $options = [
+      'all' => FALSE,
+      'group' => self::REQ,
+      'tag' => self::REQ,
+      'limit' => self::REQ,
+      'feedback' => self::REQ,
+      'idlist' => self::REQ,
+      'idlist-delimiter' => MigrateTools::DEFAULT_ID_LIST_DELIMITER,
+      'update' => FALSE,
+      'force' => FALSE,
+      'continue-on-failure' => FALSE,
+      'execute-dependencies' => FALSE,
+      'skip-progress-bar' => FALSE,
+      'sync' => FALSE,
+      'run' => NULL,
+    ],
+  ) : void {
     parent::import($migration_names, $options);
   }
 
@@ -233,18 +236,21 @@ protected function executeMigration(MigrationInterface $migration, $migration_id
    * @throws \Exception
    *   If there are not enough parameters to the command.
    */
-  public function rollback($migration_names = '', array $options = [
-    'all' => FALSE,
-    'group' => self::REQ,
-    'tag' => self::REQ,
-    'feedback' => self::REQ,
-    'idlist' => self::REQ,
-    'idlist-delimiter' => MigrateTools::DEFAULT_ID_LIST_DELIMITER,
-    'skip-progress-bar' => FALSE,
-    'continue-on-failure' => FALSE,
-    'statuses' => self::REQ,
-    'run' => NULL,
-  ]) : void {
+  public function rollback(
+    $migration_names = '',
+    array $options = [
+      'all' => FALSE,
+      'group' => self::REQ,
+      'tag' => self::REQ,
+      'feedback' => self::REQ,
+      'idlist' => self::REQ,
+      'idlist-delimiter' => MigrateTools::DEFAULT_ID_LIST_DELIMITER,
+      'skip-progress-bar' => FALSE,
+      'continue-on-failure' => FALSE,
+      'statuses' => self::REQ,
+      'run' => NULL,
+    ],
+  ) : void {
     $group_names = $options['group'];
     $tag_names = $options['tag'];
     $all = $options['all'];
@@ -316,13 +322,15 @@ public function rollback($migration_names = '', array $options = [
    * @option tag Name of the migration tag to import.
    * @option sort Sort according to weight.
    */
-  public function listMigrations(array $options = [
-    'all' => FALSE,
-    'group' => self::REQ,
-    'tag' => self::REQ,
-    'format' => 'csv',
-    'sort' => FALSE,
-  ]) : RowsOfFields {
+  public function listMigrations(
+    array $options = [
+      'all' => FALSE,
+      'group' => self::REQ,
+      'tag' => self::REQ,
+      'format' => 'csv',
+      'sort' => FALSE,
+    ],
+  ) : RowsOfFields {
 
     $generate_order = function () use ($options) {
       $migration_groups = $this->migrationsList('', $options);
@@ -421,11 +429,14 @@ protected static function getMigrateToolsLogger() : LoggerInterface {
    *
    * @islandora-drush-utils-user-wrap
    */
-  public function enqueueMigration(string $migration_id, array $options = [
-    'update' => FALSE,
-    'sync' => FALSE,
-    'run' => NULL,
-  ]) : void {
+  public function enqueueMigration(
+    string $migration_id,
+    array $options = [
+      'update' => FALSE,
+      'sync' => FALSE,
+      'run' => NULL,
+    ],
+  ) : void {
     $executable = $this->getExecutable($migration_id, $options);
     // drush_op() provides --simulate support.
     drush_op([$executable, 'prepareBatch']);
@@ -444,11 +455,14 @@ public function enqueueMigration(string $migration_id, array $options = [
    *
    * @islandora-drush-utils-user-wrap
    */
-  public function processEnqueuedMigration(string $migration_id, array $options = [
-    'update' => FALSE,
-    'sync' => FALSE,
-    'run' => NULL,
-  ]) : void {
+  public function processEnqueuedMigration(
+    string $migration_id,
+    array $options = [
+      'update' => FALSE,
+      'sync' => FALSE,
+      'run' => NULL,
+    ],
+  ) : void {
     $executable = $this->getExecutable($migration_id, $options);
     // drush_op() provides --simulate support.
     $batch = [
@@ -482,11 +496,14 @@ public function processEnqueuedMigration(string $migration_id, array $options =
    *
    * @islandora-drush-utils-user-wrap
    */
-  public function finishEnqueuedMigration(string $migration_id, array $options = [
-    'update' => FALSE,
-    'sync' => FALSE,
-    'run' => NULL,
-  ]) {
+  public function finishEnqueuedMigration(
+    string $migration_id,
+    array $options = [
+      'update' => FALSE,
+      'sync' => FALSE,
+      'run' => NULL,
+    ],
+  ) {
     $executable = $this->getExecutable($migration_id, $options);
     drush_op([$executable, 'teardownMigration']);
   }
@@ -501,9 +518,13 @@ public function finishEnqueuedMigration(string $migration_id, array $options = [
    *
    * @command dgi-migrate:enqueue-terminal
    */
-  public function enqueueTerminal(string $migration_id, string $run_id, array $options = [
-    'priority' => 4,
-  ]) {
+  public function enqueueTerminal(
+    string $migration_id,
+    string $run_id,
+    array $options = [
+      'priority' => 4,
+    ],
+  ) {
     $stomp_queue = StompQueue::create($migration_id, $run_id);
     $stomp_queue->sendTerminal([
       'priority' => $options['priority'] ?? 4,
diff --git a/src/Plugin/migrate/destination/DgiRevisionedEntity.php b/src/Plugin/migrate/destination/DgiRevisionedEntity.php
index 6a35a8b8..bc53f604 100644
--- a/src/Plugin/migrate/destination/DgiRevisionedEntity.php
+++ b/src/Plugin/migrate/destination/DgiRevisionedEntity.php
@@ -4,9 +4,9 @@
 
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\migrate\MigrateException;
-use Drupal\migrate\Plugin\migrate\destination\EntityContentBase;
 use Drupal\migrate\Plugin\MigrateIdMapInterface;
 use Drupal\migrate\Plugin\MigrationInterface;
+use Drupal\migrate\Plugin\migrate\destination\EntityContentBase;
 use Drupal\migrate\Row;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -42,7 +42,7 @@ class DgiRevisionedEntity extends EntityContentBase {
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, ?MigrationInterface $migration = NULL) {
     $entity_type = $configuration['entity_type'] ?? 'node';
     $instance = parent::create($container, $configuration, 'entity:' . $entity_type, $plugin_definition, $migration);
     $instance->entityType = $entity_type;
diff --git a/src/Plugin/migrate/id_map/SmartSql.php b/src/Plugin/migrate/id_map/SmartSql.php
index 5f24241c..1aeffec1 100644
--- a/src/Plugin/migrate/id_map/SmartSql.php
+++ b/src/Plugin/migrate/id_map/SmartSql.php
@@ -6,11 +6,11 @@
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\migrate\EntityFieldDefinitionTrait;
 use Drupal\migrate\MigrateException;
-use Drupal\migrate\Plugin\migrate\destination\Entity;
-use Drupal\migrate\Plugin\migrate\id_map\Sql;
 use Drupal\migrate\Plugin\MigrateIdMapInterface;
 use Drupal\migrate\Plugin\MigrationInterface;
 use Drupal\migrate\Plugin\MigrationPluginManagerInterface;
+use Drupal\migrate\Plugin\migrate\destination\Entity;
+use Drupal\migrate\Plugin\migrate\id_map\Sql;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
@@ -108,7 +108,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, ?MigrationInterface $migration = NULL) {
     return parent::create($container, $configuration, $plugin_id, $plugin_definition, $migration)
       ->setEntityTypeManager($container->get('entity_type.manager'));
   }
diff --git a/src/Plugin/migrate/process/DetermineExtension.php b/src/Plugin/migrate/process/DetermineExtension.php
index 7f84a07d..50db94ee 100644
--- a/src/Plugin/migrate/process/DetermineExtension.php
+++ b/src/Plugin/migrate/process/DetermineExtension.php
@@ -35,7 +35,7 @@ class DetermineExtension extends ProcessPluginBase {
   /**
    * Constructor.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, ?MigrationInterface $migration = NULL) {
     parent::__construct($configuration, $plugin_id, $plugin_definition, $migration);
 
     $this->mimeTypes = new MimeTypes();
diff --git a/src/Plugin/migrate/process/LockingMigrationLookup.php b/src/Plugin/migrate/process/LockingMigrationLookup.php
index 0a4c6e09..bdecd296 100644
--- a/src/Plugin/migrate/process/LockingMigrationLookup.php
+++ b/src/Plugin/migrate/process/LockingMigrationLookup.php
@@ -578,7 +578,7 @@ protected function doStub(&$context) {
   /**
    * {@inheritDoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, ?MigrationInterface $migration = NULL) {
     $instance = new static($configuration, $plugin_id, $plugin_definition);
 
     /** @var \Drupal\Component\Plugin\PluginManagerInterface $process_plugin_manager */
diff --git a/src/Plugin/migrate/process/NaiveFileCopy.php b/src/Plugin/migrate/process/NaiveFileCopy.php
index 1087baee..2cf15499 100644
--- a/src/Plugin/migrate/process/NaiveFileCopy.php
+++ b/src/Plugin/migrate/process/NaiveFileCopy.php
@@ -9,8 +9,8 @@
 use Drupal\Core\StreamWrapper\StreamWrapperManagerInterface;
 use Drupal\migrate\MigrateException;
 use Drupal\migrate\MigrateExecutableInterface;
-use Drupal\migrate\Plugin\migrate\process\FileCopy;
 use Drupal\migrate\Plugin\MigrateProcessInterface;
+use Drupal\migrate\Plugin\migrate\process\FileCopy;
 use Drupal\migrate\Row;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
diff --git a/src/Plugin/migrate/process/RequiredEntityLookup.php b/src/Plugin/migrate/process/RequiredEntityLookup.php
index c8a5e627..443b50b1 100644
--- a/src/Plugin/migrate/process/RequiredEntityLookup.php
+++ b/src/Plugin/migrate/process/RequiredEntityLookup.php
@@ -28,7 +28,7 @@ class RequiredEntityLookup extends EntityLookup {
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $pluginId, $pluginDefinition, MigrationInterface $migration = NULL) {
+  public static function create(ContainerInterface $container, array $configuration, $pluginId, $pluginDefinition, ?MigrationInterface $migration = NULL) {
     $instance = parent::create($container, $configuration, $pluginId, $pluginDefinition, $migration);
 
     $instance->missingBehaviorInit();
diff --git a/src/Plugin/migrate/process/StaticMap.php b/src/Plugin/migrate/process/StaticMap.php
index 7360ce17..6396699b 100644
--- a/src/Plugin/migrate/process/StaticMap.php
+++ b/src/Plugin/migrate/process/StaticMap.php
@@ -5,8 +5,8 @@
 use Drupal\migrate\MigrateExecutableInterface;
 use Drupal\migrate\MigrateSkipProcessException;
 use Drupal\migrate\MigrateSkipRowException;
-use Drupal\migrate\Plugin\migrate\process\StaticMap as Upstream;
 use Drupal\migrate\Plugin\MigrationInterface;
+use Drupal\migrate\Plugin\migrate\process\StaticMap as Upstream;
 use Drupal\migrate\Row;
 
 /**
diff --git a/src/Plugin/migrate/source/Migration.php b/src/Plugin/migrate/source/Migration.php
index 2872c788..e3fae6ed 100644
--- a/src/Plugin/migrate/source/Migration.php
+++ b/src/Plugin/migrate/source/Migration.php
@@ -4,9 +4,9 @@
 
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\dgi_migrate\MigrationIterator;
-use Drupal\migrate\Plugin\migrate\source\SourcePluginBase;
 use Drupal\migrate\Plugin\MigrationInterface;
 use Drupal\migrate\Plugin\MigrationPluginManagerInterface;
+use Drupal\migrate\Plugin\migrate\source\SourcePluginBase;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -45,7 +45,7 @@ public function __construct(array $configuration, $plugin_id, $plugin_definition
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration = NULL) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition, ?MigrationInterface $migration = NULL) {
     return new static(
       $configuration,
       $plugin_id,
diff --git a/src/StompQueue.php b/src/StompQueue.php
index bd9ef9ee..aace2c03 100644
--- a/src/StompQueue.php
+++ b/src/StompQueue.php
@@ -67,7 +67,7 @@ public function __construct(
     IStateful $stomp,
     LoggerInterface $logger,
     string $name,
-    string $group
+    string $group,
   ) {
     $this->stomp = $stomp;
     $this->logger = $logger;