diff --git a/mailpoet/tests/integration/API/JSON/v1/HelpTest.php b/mailpoet/tests/integration/API/JSON/v1/HelpTest.php
new file mode 100644
index 0000000000..35ead34c19
--- /dev/null
+++ b/mailpoet/tests/integration/API/JSON/v1/HelpTest.php
@@ -0,0 +1,94 @@
+<?php declare(strict_types = 1);
+
+namespace MailPoet\Test\API\JSON\v1;
+
+use MailPoet\API\JSON\Response as APIResponse;
+use MailPoet\API\JSON\v1\Help;
+use MailPoet\Entities\ScheduledTaskEntity;
+use MailPoet\Newsletter\Sending\ScheduledTasksRepository;
+use MailPoet\Test\DataFactories\ScheduledTask as ScheduledTaskFactory;
+
+class HelpTest extends \MailPoetTest {
+
+  /** @var Help */
+  private $endpoint;
+
+  /** @var ScheduledTasksRepository */
+  private $scheduledTasksRepository;
+
+  public function _before() {
+    parent::_before();
+    $this->endpoint = $this->diContainer->get(Help::class);
+    $this->scheduledTasksRepository = $this->diContainer->get(ScheduledTasksRepository::class);
+  }
+
+  public function testItReturnsErrorWhenIdIsMissing() {
+    $response = $this->endpoint->cancelTask([]);
+    verify($response)->instanceOf('\MailPoet\API\JSON\ErrorResponse');
+    verify($response->status)->equals(400);
+    verify($response->errors[0]['message'])->equals('Missing mandatory argument `id`.');
+
+    $response = $this->endpoint->rescheduleTask([]);
+    verify($response)->instanceOf('\MailPoet\API\JSON\ErrorResponse');
+    verify($response->status)->equals(400);
+    verify($response->errors[0]['message'])->equals('Missing mandatory argument `id`.');
+  }
+
+  public function testItReturnsErrorWhenTaskDoesntExist() {
+    $response = $this->endpoint->cancelTask(['id' => 99999]);
+    verify($response)->instanceOf('\MailPoet\API\JSON\ErrorResponse');
+    verify($response->status)->equals(400);
+    verify($response->errors[0]['message'])->equals('Task not found.');
+
+    $response = $this->endpoint->rescheduleTask(['id' => 99999]);
+    verify($response)->instanceOf('\MailPoet\API\JSON\ErrorResponse');
+    verify($response->status)->equals(400);
+    verify($response->errors[0]['message'])->equals('Task not found.');
+  }
+
+  public function testItReturnsErrorWhenCancellingCompletedTask() {
+    $task = (new ScheduledTaskFactory())->create('sending', ScheduledTaskEntity::STATUS_COMPLETED, new \DateTime());
+    $response = $this->endpoint->cancelTask(['id' => $task->getId()]);
+    verify($response)->instanceOf('\MailPoet\API\JSON\ErrorResponse');
+    verify($response->status)->equals(400);
+    verify($response->errors[0]['message'])->equals('Only scheduled tasks can be cancelled');
+  }
+
+  public function testItReturnsErrorWhenReschedulingCompletedTask() {
+    $task = (new ScheduledTaskFactory())->create('sending', ScheduledTaskEntity::STATUS_COMPLETED, new \DateTime());
+    $response = $this->endpoint->rescheduleTask(['id' => $task->getId()]);
+    verify($response)->instanceOf('\MailPoet\API\JSON\ErrorResponse');
+    verify($response->status)->equals(400);
+    verify($response->errors[0]['message'])->equals('Only cancelled tasks can be rescheduled');
+  }
+
+  public function testItCanCancelTask() {
+    $task = (new ScheduledTaskFactory())->create('sending', ScheduledTaskEntity::STATUS_SCHEDULED, new \DateTime());
+    $response = $this->endpoint->cancelTask(['id' => $task->getId()]);
+    verify($response)->instanceOf(APIResponse::class);
+    verify($response->status)->equals(200);
+
+    $task = $this->scheduledTasksRepository->findOneById($task->getId());
+    verify($task)->instanceOf(ScheduledTaskEntity::class);
+    if ($task) {
+      verify($task->getStatus())->equals(ScheduledTaskEntity::STATUS_CANCELLED);
+      verify($task->getCancelledAt())->notNull();
+      verify($task->getInProgress())->equals(0);
+    }
+  }
+
+  public function testItCanRescheduleTask() {
+    $task = (new ScheduledTaskFactory())->create('sending', ScheduledTaskEntity::STATUS_CANCELLED, new \DateTime());
+    $response = $this->endpoint->rescheduleTask(['id' => $task->getId()]);
+    verify($response)->instanceOf(APIResponse::class);
+    verify($response->status)->equals(200);
+
+    $task = $this->scheduledTasksRepository->findOneById($task->getId());
+    verify($task)->instanceOf(ScheduledTaskEntity::class);
+    if ($task) {
+      verify($task->getStatus())->equals(ScheduledTaskEntity::STATUS_SCHEDULED);
+      verify($task->getCancelledAt())->null();
+      verify($task->getInProgress())->null();
+    }
+  }
+}