diff --git a/lib/Models/CustomField.php b/lib/Models/CustomField.php
index d5d1b42f4d..aba9c22231 100644
--- a/lib/Models/CustomField.php
+++ b/lib/Models/CustomField.php
@@ -6,6 +6,7 @@ use MailPoet\Form\Block\Date;
 use MailPoet\WP\Functions as WPFunctions;
 
 /**
+ * @property string $name
  * @property string $type
  * @property string|array|null $params
  */
diff --git a/lib/Models/Model.php b/lib/Models/Model.php
index 866a29a307..30d7ef4055 100644
--- a/lib/Models/Model.php
+++ b/lib/Models/Model.php
@@ -123,6 +123,8 @@ use MailPoet\WP\Functions as WPFunctions;
  * @property string|null $created_at
  * @property string|null $updated_at
  * @property string|null $id
+ * @property string|null $first
+ * @property string|null $last
  */
 
 class Model extends \MailPoetVendor\Sudzy\ValidModel {
diff --git a/lib/Models/Newsletter.php b/lib/Models/Newsletter.php
index 5abedb35bd..12ee75d510 100644
--- a/lib/Models/Newsletter.php
+++ b/lib/Models/Newsletter.php
@@ -20,6 +20,7 @@ use function MailPoetVendor\array_column;
 
 /**
  * @property int $id
+ * @property int $parent_id
  * @property string $type
  * @property object|array|boolean $queue
  * @property string $hash
@@ -29,11 +30,13 @@ use function MailPoetVendor\array_column;
  * @property array $options
  * @property int $children_count
  * @property bool|array $statistics
+ * @property string $sent_at
  * @property string $deleted_at
  * @property int $total_sent
  * @property int $total_scheduled
  * @property array $segments
  * @property string $subject
+ * @property string $preheader
  * @property string $body
  * @property string|null $schedule
  * @property boolean|null $isScheduled
diff --git a/lib/Models/NewsletterOptionField.php b/lib/Models/NewsletterOptionField.php
index 7ea5734683..4abeb73a69 100644
--- a/lib/Models/NewsletterOptionField.php
+++ b/lib/Models/NewsletterOptionField.php
@@ -4,6 +4,11 @@ namespace MailPoet\Models;
 
 use MailPoet\WP\Functions as WPFunctions;
 
+/**
+ * @property string $name
+ * @property string $newsletter_type
+ */
+
 class NewsletterOptionField extends Model {
   public static $_table = MP_NEWSLETTER_OPTION_FIELDS_TABLE;
 
diff --git a/lib/Models/SendingQueue.php b/lib/Models/SendingQueue.php
index 156eefe40b..6fbf35d768 100644
--- a/lib/Models/SendingQueue.php
+++ b/lib/Models/SendingQueue.php
@@ -19,6 +19,7 @@ use MailPoet\WP\Functions as WPFunctions;
  * @property string|array $subscribers
  * @property string|null $deleted_at
  * @property string $scheduled_at
+ * @property string $status
  */
 
 class SendingQueue extends Model {
diff --git a/lib/Tasks/Sending.php b/lib/Tasks/Sending.php
index 6627cd056d..6ed68429ff 100644
--- a/lib/Tasks/Sending.php
+++ b/lib/Tasks/Sending.php
@@ -16,6 +16,9 @@ use function MailPoetVendor\array_column;
  * @property int $task_id
  * @property int $id
  * @property int $newsletter_id
+ * @property string $newsletter_rendered_subject
+ * @property string $newsletter_rendered_body
+ * @property bool $non_existent_column
  */
 class Sending {
   const TASK_TYPE = 'sending';
diff --git a/tests/integration/Cron/Workers/SchedulerTest.php b/tests/integration/Cron/Workers/SchedulerTest.php
index 9877dec6ed..b01d3c9cab 100644
--- a/tests/integration/Cron/Workers/SchedulerTest.php
+++ b/tests/integration/Cron/Workers/SchedulerTest.php
@@ -514,7 +514,6 @@ class SchedulerTest extends \MailPoetTest {
       'processWelcomeNewsletter' => Expected::exactly(1),
       'cron_helper' => $this->cron_helper,
     ], $this);
-    $scheduler->timer = microtime(true);
     $scheduler->process();
   }
 
@@ -527,7 +526,6 @@ class SchedulerTest extends \MailPoetTest {
       'processPostNotificationNewsletter' => Expected::exactly(1),
       'cron_helper' => $this->cron_helper,
     ], $this);
-    $scheduler->timer = microtime(true);
     $scheduler->process();
   }
 
@@ -540,7 +538,6 @@ class SchedulerTest extends \MailPoetTest {
       'processScheduledStandardNewsletter' => Expected::exactly(1),
       'cron_helper' => $this->cron_helper,
     ], $this);
-    $scheduler->timer = microtime(true);
     $scheduler->process();
   }
 
@@ -569,7 +566,6 @@ class SchedulerTest extends \MailPoetTest {
       'cron_helper' => $this->cron_helper,
     ], $this);
     // scheduled job is not processed
-    $scheduler->timer = microtime(true);
     $scheduler->process();
   }
 
@@ -584,7 +580,6 @@ class SchedulerTest extends \MailPoetTest {
       'cron_helper' => $this->cron_helper,
     ], $this);
     // scheduled job is processed
-    $scheduler->timer = microtime(true);
     $scheduler->process();
   }
 
@@ -631,7 +626,6 @@ class SchedulerTest extends \MailPoetTest {
       'cron_helper' => $this->cron_helper,
     ], $this);
     // scheduled job is processed
-    $scheduler->timer = microtime(true);
     $scheduler->process();
   }
 
@@ -722,7 +716,6 @@ class SchedulerTest extends \MailPoetTest {
     $queue->updated_at = $originalUpdated;
     $queue->save();
     $scheduler = new Scheduler($this->makeEmpty(SubscribersFinder::class), $this->logger_factory, $this->cron_helper);
-    $scheduler->timer = microtime(true);
     $scheduler->process();
     $newQueue = ScheduledTask::findOne($queue->task_id);
     expect($newQueue->updated_at)->notEquals($originalUpdated);
diff --git a/tests/integration/Cron/Workers/SendingQueue/MigrationTest.php b/tests/integration/Cron/Workers/SendingQueue/MigrationTest.php
index c72f115915..1d435530e4 100644
--- a/tests/integration/Cron/Workers/SendingQueue/MigrationTest.php
+++ b/tests/integration/Cron/Workers/SendingQueue/MigrationTest.php
@@ -129,7 +129,7 @@ class MigrationTest extends \MailPoetTest {
     ]);
 
     $next_run_date = $this->worker->getNextRunDate($wp);
-    expect($next_run_date->timestamp)->equals($timestamp);
+    expect($next_run_date->getTimestamp())->equals($timestamp);
   }
 
   private function createScheduledTask() {