diff --git a/mailpoet/tests/integration/API/JSON/v1/SettingsTest.php b/mailpoet/tests/integration/API/JSON/v1/SettingsTest.php
index 7662aba125..a7a21aebd1 100644
--- a/mailpoet/tests/integration/API/JSON/v1/SettingsTest.php
+++ b/mailpoet/tests/integration/API/JSON/v1/SettingsTest.php
@@ -253,7 +253,7 @@ class SettingsTest extends \MailPoetTest {
       ]
     );
     $this->assertInstanceOf(ScheduledTaskEntity::class, $task);
-    expect($task->getScheduledAt())->lessThan(Carbon::now());
+    verify($task->getScheduledAt())->lessThan(Carbon::now());
   }
 
   public function testItRemovesFreeAddressOverrideOnMSSActivation() {
diff --git a/mailpoet/tests/integration/Cron/ActionScheduler/Actions/DaemonRunTest.php b/mailpoet/tests/integration/Cron/ActionScheduler/Actions/DaemonRunTest.php
index d93d622cef..155297d0ba 100644
--- a/mailpoet/tests/integration/Cron/ActionScheduler/Actions/DaemonRunTest.php
+++ b/mailpoet/tests/integration/Cron/ActionScheduler/Actions/DaemonRunTest.php
@@ -67,7 +67,7 @@ class DaemonRunTest extends \MailPoetTest {
 
     // Verify execution limit after run. floor(30 - some time taken by previous action) - 10s (safety execution timout margin)
     verify($this->daemonRun->getDaemonExecutionLimit())->greaterThan(0);
-    expect($this->daemonRun->getDaemonExecutionLimit())->lessThan(20);
+    verify($this->daemonRun->getDaemonExecutionLimit())->lessThan(20);
   }
 
   public function testItDoesNotContinueWhenThePreviousRunSuspiciouslyShort() {
diff --git a/mailpoet/tests/integration/Cron/CronHelperTest.php b/mailpoet/tests/integration/Cron/CronHelperTest.php
index 96330fba7b..933548ce9d 100644
--- a/mailpoet/tests/integration/Cron/CronHelperTest.php
+++ b/mailpoet/tests/integration/Cron/CronHelperTest.php
@@ -111,7 +111,7 @@ class CronHelperTest extends \MailPoetTest {
     $cronHelper->accessDaemon('some_token');
     $updatedDaemon = $cronHelper->getDaemon();
     verify($updatedDaemon['run_accessed_at'])->greaterThanOrEqual($time);
-    expect($updatedDaemon['run_accessed_at'])->lessThan($time + 2);
+    verify($updatedDaemon['run_accessed_at'])->lessThan($time + 2);
   }
 
   public function testItThrowsAnExceptionIfAccessingNonExistingDaemon() {
diff --git a/mailpoet/tests/integration/Cron/DaemonHttpRunnerTest.php b/mailpoet/tests/integration/Cron/DaemonHttpRunnerTest.php
index 6df60d818c..bbb57c3cd8 100644
--- a/mailpoet/tests/integration/Cron/DaemonHttpRunnerTest.php
+++ b/mailpoet/tests/integration/Cron/DaemonHttpRunnerTest.php
@@ -99,7 +99,7 @@ class DaemonHttpRunnerTest extends \MailPoetTest {
     $daemon = $this->makeEmpty(Daemon::class);
     $daemonHttpRunner = $this->make(DaemonHttpRunner::class, [
       'pauseExecution' => Expected::exactly(1, function($pauseDelay) {
-        expect($pauseDelay)->lessThan($this->cronHelper->getDaemonExecutionLimit());
+        verify($pauseDelay)->lessThan($this->cronHelper->getDaemonExecutionLimit());
         verify($pauseDelay)->greaterThan($this->cronHelper->getDaemonExecutionLimit() - 1);
       }),
       'callSelf' => null,
@@ -242,9 +242,9 @@ class DaemonHttpRunnerTest extends \MailPoetTest {
     $daemonHttpRunner->run($data);
     $updatedDaemon = $this->settings->get(CronHelper::DAEMON_SETTING);
     verify($updatedDaemon['run_started_at'])->greaterThanOrEqual($now);
-    expect($updatedDaemon['run_started_at'])->lessThan($now + 2);
+    verify($updatedDaemon['run_started_at'])->lessThan($now + 2);
     verify($updatedDaemon['run_completed_at'])->greaterThanOrEqual($now + 2);
-    expect($updatedDaemon['run_completed_at'])->lessThan($now + 4);
+    verify($updatedDaemon['run_completed_at'])->lessThan($now + 4);
   }
 
   public function testItCanRun() {
diff --git a/mailpoet/tests/integration/Cron/Workers/KeyCheck/SendingServiceKeyCheckTest.php b/mailpoet/tests/integration/Cron/Workers/KeyCheck/SendingServiceKeyCheckTest.php
index 7495370028..0b92a1c51b 100644
--- a/mailpoet/tests/integration/Cron/Workers/KeyCheck/SendingServiceKeyCheckTest.php
+++ b/mailpoet/tests/integration/Cron/Workers/KeyCheck/SendingServiceKeyCheckTest.php
@@ -38,7 +38,7 @@ class SendingServiceKeyCheckTest extends \MailPoetTest {
     $nextRun = $this->worker->getNextRunDate();
     $nextDay = Carbon::now()->startOfDay()->addDay()->addHours(6);
     verify($nextRun->format('Y-m-d'))->equals($nextDay->format('Y-m-d'));
-    expect($nextRun)->lessThan($nextDay);
+    verify($nextRun)->lessThan($nextDay);
 
     // when pending key approval, next run is scheduled in an hour
     $settings = $this->diContainer->get(SettingsController::class);
@@ -51,7 +51,7 @@ class SendingServiceKeyCheckTest extends \MailPoetTest {
 
     $nextRunDate = $this->worker->getNextRunDate();
     verify($nextRunDate)->greaterThan(Carbon::now()->addMinutes(55));
-    expect($nextRunDate)->lessThan(Carbon::now()->addMinutes(65));
+    verify($nextRunDate)->lessThan(Carbon::now()->addMinutes(65));
   }
 
   public function testItResumesSendingWhenKeyApproved() {
diff --git a/mailpoet/tests/integration/Cron/Workers/SchedulerTest.php b/mailpoet/tests/integration/Cron/Workers/SchedulerTest.php
index 527d3e5e8e..3ca4b9025c 100644
--- a/mailpoet/tests/integration/Cron/Workers/SchedulerTest.php
+++ b/mailpoet/tests/integration/Cron/Workers/SchedulerTest.php
@@ -714,7 +714,7 @@ class SchedulerTest extends \MailPoetTest {
     $scheduler->processScheduledStandardNewsletter($newsletter, $queue);
     $refetchedTask = $this->scheduledTasksRepository->findOneById($task->getId());
     $this->assertInstanceOf(ScheduledTaskEntity::class, $refetchedTask);
-    expect($refetchedTask->getScheduledAt())->lessThan(Carbon::createFromTimestamp(WPFunctions::get()->currentTime('timestamp'))->addHours(1));
+    verify($refetchedTask->getScheduledAt())->lessThan(Carbon::createFromTimestamp(WPFunctions::get()->currentTime('timestamp'))->addHours(1));
   }
 
   /**
diff --git a/mailpoet/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php b/mailpoet/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
index 655b37eb54..182fc0cbcc 100644
--- a/mailpoet/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
+++ b/mailpoet/tests/integration/Cron/Workers/SendingQueue/SendingQueueTest.php
@@ -1196,7 +1196,7 @@ class SendingQueueTest extends \MailPoetTest {
 
     $refetchedTask = ScheduledTask::where('id', $task->id)->findOne();
     $this->assertInstanceOf(ScheduledTask::class, $refetchedTask); // PHPStan
-    expect($refetchedTask->scheduledAt)->lessThan(Carbon::createFromTimestamp(WPFunctions::get()->currentTime('timestamp'))->addHours(42));
+    verify($refetchedTask->scheduledAt)->lessThan(Carbon::createFromTimestamp(WPFunctions::get()->currentTime('timestamp'))->addHours(42));
   }
 
   public function testDoesNoRescheduleBounceTaskWhenPlannedInNearFuture() {
diff --git a/mailpoet/tests/integration/Cron/Workers/SubscribersStatsReportTest.php b/mailpoet/tests/integration/Cron/Workers/SubscribersStatsReportTest.php
index 317ce24aec..c5b39f4b76 100644
--- a/mailpoet/tests/integration/Cron/Workers/SubscribersStatsReportTest.php
+++ b/mailpoet/tests/integration/Cron/Workers/SubscribersStatsReportTest.php
@@ -106,11 +106,11 @@ class SubscribersStatsReportTest extends \MailPoetTest {
     $result = $this->worker->getNextRunDate();
     verify($result)->instanceOf(Carbon::class);
     verify($result->getTimestamp())->greaterThan($time);
-    expect($result->getTimestamp())->lessThan($time + $maxExpectedScheduleInterval);
+    verify($result->getTimestamp())->lessThan($time + $maxExpectedScheduleInterval);
     $result2 = $this->worker->getNextRunDate();
     verify($result2)->instanceOf(Carbon::class);
     verify($result2->getTimestamp())->greaterThan($time);
-    expect($result2->getTimestamp())->lessThan($time + $maxExpectedScheduleInterval);
+    verify($result2->getTimestamp())->lessThan($time + $maxExpectedScheduleInterval);
     verify($result2->getTimestamp())->notEquals($result->getTimestamp());
   }
 }
diff --git a/mailpoet/tests/integration/Models/SubscriberTest.php b/mailpoet/tests/integration/Models/SubscriberTest.php
index 8273772f78..6f0be5a5ca 100644
--- a/mailpoet/tests/integration/Models/SubscriberTest.php
+++ b/mailpoet/tests/integration/Models/SubscriberTest.php
@@ -141,7 +141,7 @@ class SubscriberTest extends \MailPoetTest {
     $subscriberUpdated = Subscriber::where('email', $this->testData['email'])
       ->findOne();
     $lastSubscribedAt = new Carbon($subscriberUpdated->lastUpdatedAt);
-    expect($lastSubscribedAt)->lessThan((new Carbon())->addSeconds(2));
+    verify($lastSubscribedAt)->lessThan((new Carbon())->addSeconds(2));
     verify($lastSubscribedAt)->greaterThan((new Carbon())->subSeconds(2));
 
     // Change to other status keeps last_updated_at
diff --git a/mailpoet/tests/integration/Statistics/Track/SubscriberActivityTrackerTest.php b/mailpoet/tests/integration/Statistics/Track/SubscriberActivityTrackerTest.php
index e9a6e8e47f..e8dade8f05 100644
--- a/mailpoet/tests/integration/Statistics/Track/SubscriberActivityTrackerTest.php
+++ b/mailpoet/tests/integration/Statistics/Track/SubscriberActivityTrackerTest.php
@@ -105,9 +105,9 @@ class SubscriberActivityTrackerTest extends \MailPoetTest {
     $subscriber = $this->entityManager->getRepository(SubscriberEntity::class)->findOneBy(['wpUserId' => $user->ID]);
     $this->assertInstanceOf(SubscriberEntity::class, $subscriber);
     verify($subscriber->getLastEngagementAt())->greaterThan(Carbon::now()->subMinute());
-    expect($subscriber->getLastEngagementAt())->lessThan(Carbon::now()->addMinute());
+    verify($subscriber->getLastEngagementAt())->lessThan(Carbon::now()->addMinute());
     verify($subscriber->getLastPageViewAt())->greaterThan(Carbon::now()->subMinute());
-    expect($subscriber->getLastPageViewAt())->lessThan(Carbon::now()->addMinute());
+    verify($subscriber->getLastPageViewAt())->lessThan(Carbon::now()->addMinute());
   }
 
   /**
@@ -146,7 +146,7 @@ class SubscriberActivityTrackerTest extends \MailPoetTest {
     verify($result)->true();
     $this->entityManager->refresh($subscriber);
     verify($subscriber->getLastEngagementAt())->greaterThan(Carbon::now()->subMinute());
-    expect($subscriber->getLastEngagementAt())->lessThan(Carbon::now()->addMinute());
+    verify($subscriber->getLastEngagementAt())->lessThan(Carbon::now()->addMinute());
   }
 
   public function testItUpdatesSubscriberEngagementForWpUserEvenWithDisabledCookieTracking() {
@@ -165,7 +165,7 @@ class SubscriberActivityTrackerTest extends \MailPoetTest {
     verify($result)->true();
     $this->entityManager->refresh($subscriber);
     verify($subscriber->getLastEngagementAt())->greaterThan(Carbon::now()->subMinute());
-    expect($subscriber->getLastEngagementAt())->lessThan(Carbon::now()->addMinute());
+    verify($subscriber->getLastEngagementAt())->lessThan(Carbon::now()->addMinute());
   }
 
   public function testItDoesntTrackWhenCookieTrackingIsDisabledAndThereInNoWPUser() {