diff --git a/lib/Subscription/ManageSubscriptionFormRenderer.php b/lib/Subscription/ManageSubscriptionFormRenderer.php
index 8a2cd51a32..22c0d9be9a 100644
--- a/lib/Subscription/ManageSubscriptionFormRenderer.php
+++ b/lib/Subscription/ManageSubscriptionFormRenderer.php
@@ -74,6 +74,8 @@ class ManageSubscriptionFormRenderer {
       ]
     );
 
+    $form = $this->wp->applyFilters('mailpoet_manage_subscription_page_form_fields', $form);
+
     $templateData = [
       'actionUrl' => admin_url('admin-post.php'),
       'redirectUrl' => $this->urlHelper->getCurrentUrl(),
diff --git a/tests/integration/Subscription/ManageSubscriptionFormRendererTest.php b/tests/integration/Subscription/ManageSubscriptionFormRendererTest.php
index 9d187b66f6..118d7c3b70 100644
--- a/tests/integration/Subscription/ManageSubscriptionFormRendererTest.php
+++ b/tests/integration/Subscription/ManageSubscriptionFormRendererTest.php
@@ -6,6 +6,7 @@ use MailPoet\Entities\SegmentEntity;
 use MailPoet\Entities\SubscriberEntity;
 use MailPoet\Entities\SubscriberSegmentEntity;
 use MailPoet\Models\Subscriber;
+use MailPoet\WP\Functions as WPFunctions;
 
 class ManageSubscriptionFormRendererTest extends \MailPoetTest {
   /** @var ManageSubscriptionFormRenderer */
@@ -18,24 +19,7 @@ class ManageSubscriptionFormRendererTest extends \MailPoetTest {
   }
 
   public function testItGeneratesForm() {
-    $segment = new SegmentEntity();
-    $segment->setName('Test segment');
-    $segment->setDescription('Description');
-    $segment->setType(SegmentEntity::TYPE_DEFAULT);
-    $this->entityManager->persist($segment);
-
-    $subscriber = new SubscriberEntity();
-    $subscriber->setStatus(SubscriberEntity::STATUS_SUBSCRIBED);
-    $subscriber->setFirstName('Fname');
-    $subscriber->setLastName('Lname');
-    $subscriber->setEmail('subscriber@test.com');
-
-    $subscriberSegment = new SubscriberSegmentEntity($segment, $subscriber, SubscriberEntity::STATUS_SUBSCRIBED);
-    $this->entityManager->persist($subscriberSegment);
-    $subscriber->getSegments()->add($subscriberSegment);
-    $this->entityManager->persist($subscriber);
-    $this->entityManager->flush();
-
+    $subscriber = $this->getSubscriber($this->getSegment());
     $form = $this->formRenderer->renderForm(Subscriber::findOne($subscriber->getId()));
     expect($form)->regExp('/<form class="mailpoet-manage-subscription" method="post" action="[a-z0-9:\/\.]+wp-admin\/admin-post.php" novalidate>/');
     expect($form)->contains('<input type="hidden" name="data[email]" value="subscriber@test.com" />');
@@ -45,6 +29,52 @@ class ManageSubscriptionFormRendererTest extends \MailPoetTest {
     expect($form)->contains('Need to change your email address? Unsubscribe here, then simply sign up again.');
   }
 
+  public function testItAppliesFieldsFilter() {
+    $subscriber = $this->getSubscriber($this->getSegment());
+    $wp = $this->diContainer->get(WPFunctions::class);
+    $wp->addFilter('mailpoet_manage_subscription_page_form_fields', function($fields) {
+        $fields[] = [
+          'type' => 'text',
+          'name' => 'Additional info',
+          'id' => 'additional_info',
+          'params' => [
+            'label' => 'Additional info',
+          ],
+        ];
+        return $fields;
+    });
+    $form = $this->formRenderer->renderForm(Subscriber::findOne($subscriber->getId()));
+    expect($form)->regExp('/<input type="text" class="mailpoet_text" name="data\[[a-zA-Z0-9=_]+\]" title="Additional info" value=""  \/>/');
+  }
+
+  private function getSegment(): SegmentEntity {
+    $segment = new SegmentEntity();
+    $segment->setName('Test segment');
+    $segment->setDescription('Description');
+    $segment->setType(SegmentEntity::TYPE_DEFAULT);
+    $this->entityManager->persist($segment);
+    $this->entityManager->flush();
+    return $segment;
+  }
+
+  private function getSubscriber(SegmentEntity $segment = null): SubscriberEntity {
+    $subscriber = new SubscriberEntity();
+    $subscriber->setStatus(SubscriberEntity::STATUS_SUBSCRIBED);
+    $subscriber->setFirstName('Fname');
+    $subscriber->setLastName('Lname');
+    $subscriber->setEmail('subscriber@test.com');
+
+    if ($segment) {
+      $subscriberSegment = new SubscriberSegmentEntity($segment, $subscriber, SubscriberEntity::STATUS_SUBSCRIBED);
+      $this->entityManager->persist($subscriberSegment);
+      $subscriber->getSegments()->add($subscriberSegment);
+    }
+
+    $this->entityManager->persist($subscriber);
+    $this->entityManager->flush();
+    return $subscriber;
+  }
+
   private function cleanup() {
     $this->truncateEntity(SubscriberEntity::class);
     $this->truncateEntity(SubscriberSegmentEntity::class);