diff --git a/lib/API/JSON/v1/Newsletters.php b/lib/API/JSON/v1/Newsletters.php
index e6a20e487f..bd9515a194 100644
--- a/lib/API/JSON/v1/Newsletters.php
+++ b/lib/API/JSON/v1/Newsletters.php
@@ -202,15 +202,12 @@ class Newsletters extends APIEndpoint {
 
   public function restore($data = []) {
     $id = (isset($data['id']) ? (int)$data['id'] : false);
-    $newsletter = Newsletter::findOne($id);
-    if ($newsletter instanceof Newsletter) {
-      $newsletter->restore();
-
-      $newsletter = Newsletter::findOne($newsletter->id);
-      if(!$newsletter instanceof Newsletter) return $this->errorResponse();
-
+    $newsletter = $this->newslettersRepository->findOneById($id);
+    if ($newsletter instanceof NewsletterEntity) {
+      $this->newslettersRepository->bulkRestore([$id]);
+      $this->newslettersRepository->refresh($newsletter);
       return $this->successResponse(
-        $newsletter->asArray(),
+        $this->newslettersResponseBuilder->build($newsletter),
         ['count' => 1]
       );
     } else {
@@ -222,14 +219,12 @@ class Newsletters extends APIEndpoint {
 
   public function trash($data = []) {
     $id = (isset($data['id']) ? (int)$data['id'] : false);
-    $newsletter = Newsletter::findOne($id);
-    if ($newsletter instanceof Newsletter) {
-      $newsletter->trash();
-
-      $newsletter = Newsletter::findOne($newsletter->id);
-      if(!$newsletter instanceof Newsletter) return $this->errorResponse();
+    $newsletter = $this->newslettersRepository->findOneById($id);
+    if ($newsletter instanceof NewsletterEntity) {
+      $this->newslettersRepository->bulkTrash([$id]);
+      $this->newslettersRepository->refresh($newsletter);
       return $this->successResponse(
-        $newsletter->asArray(),
+        $this->newslettersResponseBuilder->build($newsletter),
         ['count' => 1]
       );
     } else {
@@ -241,9 +236,9 @@ class Newsletters extends APIEndpoint {
 
   public function delete($data = []) {
     $id = (isset($data['id']) ? (int)$data['id'] : false);
-    $newsletter = Newsletter::findOne($id);
-    if ($newsletter instanceof Newsletter) {
-      $newsletter->delete();
+    $newsletter = $this->newslettersRepository->findOneById($id);
+    if ($newsletter instanceof NewsletterEntity) {
+      $this->newslettersRepository->bulkDelete([$id]);
       return $this->successResponse(null, ['count' => 1]);
     } else {
       return $this->errorResponse([
diff --git a/lib/Cron/Workers/SendingQueue/Tasks/Newsletter.php b/lib/Cron/Workers/SendingQueue/Tasks/Newsletter.php
index 19b43aeaa1..ebd3ce6adb 100644
--- a/lib/Cron/Workers/SendingQueue/Tasks/Newsletter.php
+++ b/lib/Cron/Workers/SendingQueue/Tasks/Newsletter.php
@@ -12,6 +12,7 @@ use MailPoet\Models\Newsletter as NewsletterModel;
 use MailPoet\Models\NewsletterSegment as NewsletterSegmentModel;
 use MailPoet\Models\SendingQueue as SendingQueueModel;
 use MailPoet\Newsletter\Links\Links as NewsletterLinks;
+use MailPoet\Newsletter\NewslettersRepository;
 use MailPoet\Newsletter\Renderer\PostProcess\OpenTracking;
 use MailPoet\Newsletter\Renderer\Renderer;
 use MailPoet\Settings\SettingsController;
@@ -39,6 +40,9 @@ class Newsletter {
   /** @var Renderer */
   private $renderer;
 
+  /** @var NewslettersRepository */
+  private $newslettersRepository;
+
   /** @var Emoji */
   private $emoji;
 
@@ -63,6 +67,7 @@ class Newsletter {
     }
     $this->emoji = $emoji;
     $this->renderer = ContainerWrapper::getInstance()->get(Renderer::class);
+    $this->newslettersRepository = ContainerWrapper::getInstance()->get(NewslettersRepository::class);
   }
 
   public function getNewsletterFromQueue($queue) {
@@ -137,7 +142,7 @@ class Newsletter {
         'no posts in post notification, deleting it',
         ['newsletter_id' => $newsletter->id, 'task_id' => $sendingTask->taskId]
       );
-      $newsletter->delete();
+      $this->newslettersRepository->bulkDelete([(int)$newsletter->id]);
       return false;
     }
     // extract and save newsletter posts
diff --git a/lib/Doctrine/Repository.php b/lib/Doctrine/Repository.php
index ffd5eab434..1f0f3d4394 100644
--- a/lib/Doctrine/Repository.php
+++ b/lib/Doctrine/Repository.php
@@ -87,6 +87,13 @@ abstract class Repository {
     $this->entityManager->remove($entity);
   }
 
+  /**
+   * @param T $entity
+   */
+  public function refresh($entity) {
+    $this->entityManager->refresh($entity);
+  }
+
   public function flush() {
     $this->entityManager->flush();
   }
diff --git a/lib/Newsletter/NewslettersRepository.php b/lib/Newsletter/NewslettersRepository.php
index 8488d799c5..c38bb4f417 100644
--- a/lib/Newsletter/NewslettersRepository.php
+++ b/lib/Newsletter/NewslettersRepository.php
@@ -211,6 +211,9 @@ class NewslettersRepository extends Repository {
   }
 
   public function bulkDelete(array $ids) {
+    if (empty($ids)) {
+      return 0;
+    }
     $this->entityManager->getConnection()->beginTransaction();
     try {
       // Delete children
diff --git a/tasks/phpstan/phpstan-baseline-integration-tests.neon b/tasks/phpstan/phpstan-baseline-integration-tests.neon
index 87d8c5c3be..4edfbd7d62 100644
--- a/tasks/phpstan/phpstan-baseline-integration-tests.neon
+++ b/tasks/phpstan/phpstan-baseline-integration-tests.neon
@@ -250,11 +250,6 @@ parameters:
 			count: 1
 			path: ../../tests/integration/Cron/Workers/SendingQueue/MigrationTest.php
 
-		-
-			message: "#^Cannot call method delete\\(\\) on MailPoet\\\\Models\\\\Newsletter\\|false\\.$#"
-			count: 1
-			path: ../../tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
-
 		-
 			message: "#^Cannot access property \\$status on MailPoet\\\\Models\\\\Newsletter\\|false\\.$#"
 			count: 5
diff --git a/tests/integration/API/JSON/v1/NewslettersTest.php b/tests/integration/API/JSON/v1/NewslettersTest.php
index 29197ae750..4d170a0c0c 100644
--- a/tests/integration/API/JSON/v1/NewslettersTest.php
+++ b/tests/integration/API/JSON/v1/NewslettersTest.php
@@ -42,6 +42,7 @@ use MailPoetVendor\Idiorm\ORM;
 
 class NewslettersTest extends \MailPoetTest {
   public $postNotification;
+  /** @var Newsletter */
   public $newsletter;
   /** @var Newsletters */
   private $endpoint;
@@ -49,9 +50,13 @@ class NewslettersTest extends \MailPoetTest {
   /** @var CronHelper */
   private $cronHelper;
 
+  /** @var NewslettersRepository */
+  private $newsletterRepository;
+
   public function _before() {
     parent::_before();
     $this->cronHelper = ContainerWrapper::getInstance()->get(CronHelper::class);
+    $this->newsletterRepository = ContainerWrapper::getInstance()->get(NewslettersRepository::class);
     $this->endpoint = Stub::copy(
       ContainerWrapper::getInstance()->get(Newsletters::class),
       [
@@ -319,7 +324,7 @@ class NewslettersTest extends \MailPoetTest {
   }
 
   public function testItCanRestoreANewsletter() {
-    $this->newsletter->trash();
+    $this->newsletterRepository->bulkTrash([$this->newsletter->id]);
 
     $trashedNewsletter = Newsletter::findOne($this->newsletter->id);
     expect($trashedNewsletter->deletedAt)->notNull();
diff --git a/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php b/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
index 3007278b61..8b15c642e5 100644
--- a/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
+++ b/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
@@ -62,6 +62,8 @@ class SendingQueueTest extends \MailPoetTest {
   private $statsNotificationsWorker;
   /** @var LoggerFactory */
   private $loggerFactory;
+  /** @var NewslettersRepository */
+  private $newslettersRepository;
 
   public function _before() {
     parent::_before();
@@ -118,6 +120,7 @@ class SendingQueueTest extends \MailPoetTest {
       Stub::makeEmpty(NewslettersRepository::class, ['findOneById' => new NewsletterEntity()]),
       $this->cronHelper
     );
+    $this->newslettersRepository = ContainerWrapper::getInstance()->get(NewslettersRepository::class);
   }
 
   private function getDirectUnsubscribeURL() {
@@ -261,8 +264,7 @@ class SendingQueueTest extends \MailPoetTest {
     expect($queue)->notEquals(false);
 
     // delete newsletter
-    Newsletter::findOne($this->newsletter->id)
-      ->delete();
+    $this->newslettersRepository->bulkDelete([$this->newsletter->id]);
 
     // queue no longer exists
     $this->sendingQueueWorker->process();