diff --git a/tests/unit/Models/ScheduledTaskSubscriberTest.php b/tests/unit/Models/ScheduledTaskSubscriberTest.php
index c9f252cc5d..6536036903 100644
--- a/tests/unit/Models/ScheduledTaskSubscriberTest.php
+++ b/tests/unit/Models/ScheduledTaskSubscriberTest.php
@@ -1,28 +1,39 @@
 <?php
 namespace MailPoet\Test\Models;
 
+use Codeception\Util\Fixtures;
+use MailPoet\Models\ScheduledTask;
 use MailPoet\Models\ScheduledTaskSubscriber;
+use MailPoet\Models\Subscriber;
 
 class ScheduledTaskSubscriberTest extends \MailPoetTest {
   function _before() {
-    $this->task_id = 123;
-    $this->subscriber_id = 456;
+    $task = ScheduledTask::create();
+    $task->hydrate(array(
+      'status' => ScheduledTask::STATUS_SCHEDULED
+    ));
+    $this->task = $task->save();
+
+    $subscriber = Subscriber::create();
+    $subscriber->hydrate(Fixtures::get('subscriber_template'));
+    $this->subscriber = $subscriber->save();
+
     $this->task_subscriber = ScheduledTaskSubscriber::createOrUpdate(array(
-      'task_id' => $this->task_id,
-      'subscriber_id' => $this->subscriber_id
+      'task_id' => $this->task->id,
+      'subscriber_id' => $this->subscriber->id
     ));
   }
 
   function testItCanBeCreated() {
-    expect($this->task_subscriber->task_id)->equals($this->task_id);
-    expect($this->task_subscriber->subscriber_id)->equals($this->subscriber_id);
+    expect($this->task_subscriber->task_id)->equals($this->task->id);
+    expect($this->task_subscriber->subscriber_id)->equals($this->subscriber->id);
     expect($this->task_subscriber->processed)->equals(ScheduledTaskSubscriber::STATUS_UNPROCESSED);
   }
 
   function testItCanBeUpdated() {
     $task_subscriber = ScheduledTaskSubscriber::createOrUpdate(array(
-      'task_id' => $this->task_id,
-      'subscriber_id' => $this->subscriber_id,
+      'task_id' => $this->task->id,
+      'subscriber_id' => $this->subscriber->id,
       'processed' => ScheduledTaskSubscriber::STATUS_PROCESSED
     ));
     expect($task_subscriber->processed)->equals(ScheduledTaskSubscriber::STATUS_PROCESSED);
@@ -30,9 +41,9 @@ class ScheduledTaskSubscriberTest extends \MailPoetTest {
 
   function testItCanAddMultipleSubscribers() {
     ScheduledTaskSubscriber::deleteMany();
-    $subscriber_ids = array(321, 654, 987);
-    ScheduledTaskSubscriber::addSubscribers($this->task_id, $subscriber_ids);
-    $task_subscribers = ScheduledTaskSubscriber::where('task_id', $this->task_id)
+    $subscriber_ids = array(321, 654, 987); // sorted random ids
+    ScheduledTaskSubscriber::addSubscribers($this->task->id, $subscriber_ids);
+    $task_subscribers = ScheduledTaskSubscriber::where('task_id', $this->task->id)
       ->orderByAsc('subscriber_id')
       ->findMany();
     expect(count($task_subscribers))->equals(count($subscriber_ids));
@@ -42,34 +53,36 @@ class ScheduledTaskSubscriberTest extends \MailPoetTest {
   }
 
   function testItCangetUnprocessedCount() {
-    $count = ScheduledTaskSubscriber::getUnprocessedCount($this->task_id);
+    $count = ScheduledTaskSubscriber::getUnprocessedCount($this->task->id);
     expect($count)->equals(1);
     $this->task_subscriber->processed = ScheduledTaskSubscriber::STATUS_PROCESSED;
     $this->task_subscriber->save();
-    $count = ScheduledTaskSubscriber::getUnprocessedCount($this->task_id);
+    $count = ScheduledTaskSubscriber::getUnprocessedCount($this->task->id);
     expect($count)->equals(0);
   }
 
   function testItCanGetProcessedCount() {
-    $count = ScheduledTaskSubscriber::getProcessedCount($this->task_id);
+    $count = ScheduledTaskSubscriber::getProcessedCount($this->task->id);
     expect($count)->equals(0);
     $this->task_subscriber->processed = ScheduledTaskSubscriber::STATUS_PROCESSED;
     $this->task_subscriber->save();
-    $count = ScheduledTaskSubscriber::getProcessedCount($this->task_id);
+    $count = ScheduledTaskSubscriber::getProcessedCount($this->task->id);
     expect($count)->equals(1);
   }
 
   function testItCanGetTotalCount() {
     ScheduledTaskSubscriber::createOrUpdate(array(
-      'task_id' => $this->task_id,
-      'subscriber_id' => 555,
+      'task_id' => $this->task->id,
+      'subscriber_id' => 555, // random new ID
       'processed' => ScheduledTaskSubscriber::STATUS_PROCESSED
     ));
-    $count = ScheduledTaskSubscriber::getTotalCount($this->task_id);
+    $count = ScheduledTaskSubscriber::getTotalCount($this->task->id);
     expect($count)->equals(2);
   }
 
   function _after() {
+    \ORM::raw_execute('TRUNCATE ' . ScheduledTask::$_table);
     \ORM::raw_execute('TRUNCATE ' . ScheduledTaskSubscriber::$_table);
+    \ORM::raw_execute('TRUNCATE ' . Subscriber::$_table);
   }
 }