diff --git a/tests/integration/API/JSON/v1/SetupTest.php b/tests/integration/API/JSON/v1/SetupTest.php
index 0ccea31391..0e4e9631d2 100644
--- a/tests/integration/API/JSON/v1/SetupTest.php
+++ b/tests/integration/API/JSON/v1/SetupTest.php
@@ -6,6 +6,7 @@ use MailPoet\Config\Activator;
 use MailPoet\Config\Populator;
 use MailPoet\Models\Setting;
 use MailPoet\API\JSON\v1\Setup;
+use MailPoet\Referrals\ReferralDetector;
 use MailPoet\WP\Functions as WPFunctions;
 use Helper\WordPressHooks as WPHooksHelper;
 use MailPoet\API\JSON\Response as APIResponse;
@@ -25,7 +26,8 @@ class SetupTest extends \MailPoetTest {
     ]);
 
     $settings = new SettingsController();
-    $populator = new Populator($settings, $wp, new Captcha());
+    $referral_detector = new ReferralDetector($wp, $settings);
+    $populator = new Populator($settings, $wp, new Captcha(), $referral_detector);
     $router = new Setup($wp, new Activator($settings, $populator));
     $response = $router->reset();
     expect($response->status)->equals(APIResponse::STATUS_OK);
diff --git a/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php b/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
index 5d9f7af34c..1b953b4b56 100644
--- a/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
+++ b/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
@@ -27,6 +27,7 @@ use MailPoet\Models\StatisticsNewsletters;
 use MailPoet\Models\Subscriber;
 use MailPoet\Models\SubscriberSegment;
 use MailPoet\Newsletter\Links\Links;
+use MailPoet\Referrals\ReferralDetector;
 use MailPoet\Router\Endpoints\Track;
 use MailPoet\Router\Router;
 use MailPoet\Settings\SettingsController;
@@ -48,7 +49,8 @@ class SendingQueueTest extends \MailPoetTest {
     $wp_users = get_users();
     wp_set_current_user($wp_users[0]->ID);
     $this->settings = new SettingsController();
-    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha);
+    $referral_detector = new ReferralDetector(WPFunctions::get(), $this->settings);
+    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha, $referral_detector);
     $populator->up();
     $this->subscriber = Subscriber::create();
     $this->subscriber->email = 'john@doe.com';
diff --git a/tests/integration/Cron/Workers/SendingQueue/Tasks/MailerTest.php b/tests/integration/Cron/Workers/SendingQueue/Tasks/MailerTest.php
index 054bb0d4e4..142c2c4b5e 100644
--- a/tests/integration/Cron/Workers/SendingQueue/Tasks/MailerTest.php
+++ b/tests/integration/Cron/Workers/SendingQueue/Tasks/MailerTest.php
@@ -8,6 +8,7 @@ use MailPoet\Cron\Workers\SendingQueue\Tasks\Mailer as MailerTask;
 use MailPoet\Mailer\Mailer;
 use MailPoet\Models\Setting;
 use MailPoet\Models\Subscriber;
+use MailPoet\Referrals\ReferralDetector;
 use MailPoet\Settings\SettingsController;
 use MailPoet\Subscription\Captcha;
 use MailPoet\WP\Functions as WPFunctions;
@@ -26,7 +27,8 @@ class MailerTest extends \MailPoetTest {
     $wp_users = get_users();
     wp_set_current_user($wp_users[0]->ID);
     $this->settings = new SettingsController();
-    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha);
+    $referral_detector = new ReferralDetector(WPFunctions::get(), $this->settings);
+    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha, $referral_detector);
     $populator->up();
     $this->mailer_task = new MailerTask();
     $this->sender = $this->settings->get('sender');
diff --git a/tests/integration/Newsletter/ShortcodesTest.php b/tests/integration/Newsletter/ShortcodesTest.php
index 2874b17fde..a4b054124f 100644
--- a/tests/integration/Newsletter/ShortcodesTest.php
+++ b/tests/integration/Newsletter/ShortcodesTest.php
@@ -9,6 +9,7 @@ use MailPoet\Models\Subscriber;
 use MailPoet\Models\SubscriberCustomField;
 use MailPoet\Newsletter\Shortcodes\Categories\Date;
 use MailPoet\Newsletter\Url as NewsletterUrl;
+use MailPoet\Referrals\ReferralDetector;
 use MailPoet\Settings\SettingsController;
 use MailPoet\Subscription\Captcha;
 use MailPoet\Subscription\Url as SubscriptionUrl;
@@ -26,7 +27,8 @@ class ShortcodesTest extends \MailPoetTest {
   function _before() {
     parent::_before();
     $this->settings = new SettingsController();
-    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha);
+    $referral_detector = new ReferralDetector(WPFunctions::get(), $this->settings);
+    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha, $referral_detector);
     $populator->up();
     $this->WP_user = $this->_createWPUser();
     $this->WP_post = $this->_createWPPost();
diff --git a/tests/integration/Subscription/UrlTest.php b/tests/integration/Subscription/UrlTest.php
index 9f8e244a2c..29bac6792a 100644
--- a/tests/integration/Subscription/UrlTest.php
+++ b/tests/integration/Subscription/UrlTest.php
@@ -1,6 +1,7 @@
 <?php
 namespace MailPoet\Test\Subscription;
 
+use MailPoet\Referrals\ReferralDetector;
 use MailPoet\Router\Router;
 use MailPoet\Subscription\Url;
 use MailPoet\Models\Subscriber;
@@ -14,7 +15,8 @@ class UrlTest extends \MailPoetTest {
   function _before() {
     parent::_before();
     $this->settings = new SettingsController;
-    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha);
+    $referral_detector = new ReferralDetector(WPFunctions::get(), $this->settings);
+    $populator = new Populator($this->settings, WPFunctions::get(), new Captcha, $referral_detector);
     $populator->up();
   }