diff --git a/lib/Config/Migrator.php b/lib/Config/Migrator.php
index 09db0bc205..3d7f2e0e6a 100644
--- a/lib/Config/Migrator.php
+++ b/lib/Config/Migrator.php
@@ -131,7 +131,7 @@ class Migrator {
       'task_id int(11) unsigned NOT NULL,',
       'subscriber_id int(11) unsigned NOT NULL,',
       'processed int(1) NOT NULL,',
-      'failed int(1) NOT NULL,',
+      'failed int(1) NOT NULL DEFAULT 0,',
       'error text NULL,',
       'created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,',
       'PRIMARY KEY  (task_id, subscriber_id),',
diff --git a/tests/unit/Models/CustomFieldTest.php b/tests/unit/Models/CustomFieldTest.php
index e464347028..3df401e655 100644
--- a/tests/unit/Models/CustomFieldTest.php
+++ b/tests/unit/Models/CustomFieldTest.php
@@ -112,6 +112,7 @@ class CustomFieldTest extends \MailPoetTest {
       $association = SubscriberCustomField::create();
       $association->subscriber_id = $subscriber->id;
       $association->custom_field_id = $this->custom_field->id;
+      $association->value = '';
       $association->save();
     }
     $custom_field = CustomField::findOne($this->custom_field->id);