diff --git a/.assets/_symfony_scheduler_/bar.json b/.assets/_symfony_scheduler_/bar.json
new file mode 100644
index 00000000..c2f798a7
--- /dev/null
+++ b/.assets/_symfony_scheduler_/bar.json
@@ -0,0 +1 @@
+{"body":{"message":{"class":"stdClass","payload":[]},"name":"bar","arrivalTime":null,"beforeScheduling":null,"beforeSchedulingNotificationBag":null,"afterSchedulingNotificationBag":null,"beforeExecutingNotificationBag":null,"afterExecutingNotificationBag":null,"afterScheduling":null,"beforeExecuting":null,"afterExecuting":null,"description":null,"expression":"* * * * *","executionAbsoluteDeadline":null,"executionComputationTime":null,"executionDelay":null,"executionMemoryUsage":0,"executionPeriod":null,"executionRelativeDeadline":null,"executionStartDate":null,"executionEndDate":null,"executionStartTime":null,"executionEndTime":null,"accessLockBag":null,"lastExecution":null,"maxDuration":null,"maxExecutions":null,"maxRetries":null,"nice":null,"state":"enabled","executionState":null,"output":false,"priority":0,"queued":false,"scheduledAt":"2022-05-06 07:01:13.350780","singleRun":false,"deleteAfterExecute":false,"tags":[],"timezone":"UTC","tracked":true},"taskInternalType":"SchedulerBundle\\Task\\MessengerTask"}
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 4249623a..35aae54b 100644
--- a/composer.json
+++ b/composer.json
@@ -143,7 +143,7 @@
         "phpstan/phpstan-symfony": "^1.2.19",
         "phpunit/phpunit": "^9.5.26",
         "psr/cache": "^1.0 || ^2.0 || ^3.0",
-        "rector/rector": "0.15.10",
+        "rector/rector": "0.15.23",
         "symfony/cache": "^5.4 || ^6.0",
         "symfony/dependency-injection": "^5.4 || ^6.0",
         "symfony/error-handler": "^5.4 || ^6.0",
@@ -153,7 +153,8 @@
         "symfony/mercure": "^0.5.3",
         "symfony/messenger": "^5.4 || ^6.0",
         "symfony/notifier": "^5.4 || ^6.0",
-        "symfony/rate-limiter": "^5.4 || ^6.0"
+        "symfony/rate-limiter": "^5.4 || ^6.0",
+        "tomasvotruba/type-coverage": "^0.1.1"
     },
     "suggest": {
         "symfony/http-client": "For dispatching http tasks and / or using external probe clients",
diff --git a/phpstan.neon.8.0.dist b/phpstan.neon.8.0.dist
index f0c1f8df..8e5b6a33 100644
--- a/phpstan.neon.8.0.dist
+++ b/phpstan.neon.8.0.dist
@@ -4,7 +4,7 @@ includes:
     - vendor/phpstan/phpstan-phpunit/extension.neon
     - vendor/phpstan/phpstan-strict-rules/rules.neon
     - vendor/phpstan/phpstan-symfony/extension.neon
-    #- vendor/tomasvotruba/cognitive-complexity/config/extension.neon
+    - vendor/tomasvotruba/type-coverage/config/extension.neon
 
 parameters:
     level: 8
@@ -22,3 +22,8 @@ parameters:
     #cognitive_complexity:
     #    class: 50
     #    function: 8
+    type_coverage:
+        return_type: 90
+        param_type: 90
+        property_type: 90
+        print_suggestions: true
\ No newline at end of file
diff --git a/phpstan.neon.8.1.dist b/phpstan.neon.8.1.dist
index 10df217a..9d3a307d 100644
--- a/phpstan.neon.8.1.dist
+++ b/phpstan.neon.8.1.dist
@@ -4,7 +4,7 @@ includes:
     - vendor/phpstan/phpstan-phpunit/extension.neon
     - vendor/phpstan/phpstan-strict-rules/rules.neon
     - vendor/phpstan/phpstan-symfony/extension.neon
-    #- vendor/tomasvotruba/cognitive-complexity/config/extension.neon
+    - vendor/tomasvotruba/type-coverage/config/extension.neon
 
 parameters:
     level: 8
@@ -19,3 +19,8 @@ parameters:
     #cognitive_complexity:
     #    class: 50
     #    function: 8
+    type_coverage:
+        return_type: 90
+        param_type: 90
+        property_type: 90
+        print_suggestions: true
diff --git a/rector.php b/rector.php
index b8838d38..51b796f1 100644
--- a/rector.php
+++ b/rector.php
@@ -6,6 +6,7 @@
 use Rector\Core\ValueObject\PhpVersion;
 use Rector\Doctrine\Set\DoctrineSetList;
 use Rector\PHPUnit\Set\PHPUnitSetList;
+use Rector\Set\ValueObject\LevelSetList;
 use Rector\Set\ValueObject\SetList;
 use Rector\Symfony\Set\SymfonySetList;
 
@@ -45,16 +46,11 @@
     ]);
 
     $rectorConfig->sets(sets: [
+        LevelSetList::UP_TO_PHP_80,
+        SetList::PSR_4,
         SetList::CODE_QUALITY,
         SetList::DEAD_CODE,
         SetList::EARLY_RETURN,
-        SetList::PHP_70,
-        SetList::PHP_71,
-        SetList::PHP_72,
-        SetList::PHP_73,
-        SetList::PHP_74,
-        SetList::PHP_80,
-        SetList::PSR_4,
     ]);
 
     $rectorConfig->sets(sets: [
diff --git a/src/Task/HttpTask.php b/src/Task/HttpTask.php
index dae554f2..31e4dea8 100644
--- a/src/Task/HttpTask.php
+++ b/src/Task/HttpTask.php
@@ -56,7 +56,10 @@ public function setUrl(string $url): self
 
     public function getMethod(): string
     {
-        return $this->options['method'] ?? 'GET';
+        return is_string(value: $this->options['method'])
+            ? $this->options['method']
+            : 'GET'
+        ;
     }
 
     public function setMethod(string $method): self
@@ -71,7 +74,10 @@ public function setMethod(string $method): self
      */
     public function getClientOptions(): array
     {
-        return is_array(value: $this->options['client_options']) ? $this->options['client_options'] : [];
+        return is_array(value: $this->options['client_options'])
+            ? $this->options['client_options']
+            : []
+        ;
     }
 
     /**
diff --git a/src/Test/Constraint/Probe/ProbeExecutedTask.php b/src/Test/Constraint/Probe/ProbeExecutedTask.php
index f6ea2144..698af81b 100644
--- a/src/Test/Constraint/Probe/ProbeExecutedTask.php
+++ b/src/Test/Constraint/Probe/ProbeExecutedTask.php
@@ -31,6 +31,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
+        if (!$other instanceof ProbeInterface) {
+            return false;
+        }
+
         return $this->expectedCount === $other->getExecutedTasks();
     }
 }
diff --git a/src/Test/Constraint/Probe/ProbeFailedTask.php b/src/Test/Constraint/Probe/ProbeFailedTask.php
index 2c0fbff6..3504fd63 100644
--- a/src/Test/Constraint/Probe/ProbeFailedTask.php
+++ b/src/Test/Constraint/Probe/ProbeFailedTask.php
@@ -31,6 +31,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
+        if (!$other instanceof ProbeInterface) {
+            return false;
+        }
+
         return $this->expectedCount === $other->getFailedTasks();
     }
 }
diff --git a/src/Test/Constraint/Probe/ProbeScheduledTask.php b/src/Test/Constraint/Probe/ProbeScheduledTask.php
index 05515788..16df1931 100644
--- a/src/Test/Constraint/Probe/ProbeScheduledTask.php
+++ b/src/Test/Constraint/Probe/ProbeScheduledTask.php
@@ -31,6 +31,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
+        if (!$other instanceof ProbeInterface) {
+            return false;
+        }
+
         return $this->expectedCount === $other->getScheduledTasks();
     }
 }
diff --git a/src/Test/Constraint/Probe/ProbeState.php b/src/Test/Constraint/Probe/ProbeState.php
index 1f41091e..c87a7176 100644
--- a/src/Test/Constraint/Probe/ProbeState.php
+++ b/src/Test/Constraint/Probe/ProbeState.php
@@ -7,6 +7,7 @@
 use PHPUnit\Framework\Constraint\Constraint;
 use SchedulerBundle\Probe\ProbeInterface;
 
+use Throwable;
 use function json_encode;
 use function sprintf;
 
@@ -32,9 +33,14 @@ public function toString(): string
 
     /**
      * @param mixed|ProbeInterface $other
+     * @throws Throwable {@see ProbeInterface::getScheduledTasks()}
      */
     protected function matches($other): bool
     {
+        if (!$other instanceof ProbeInterface) {
+            return false;
+        }
+
         return $this->expectedState === [
             'executedTasks' => $other->getExecutedTasks(),
             'failedTasks' => $other->getFailedTasks(),
diff --git a/src/Test/Constraint/Scheduler/SchedulerDueTask.php b/src/Test/Constraint/Scheduler/SchedulerDueTask.php
index 700f5943..5d6ef77f 100644
--- a/src/Test/Constraint/Scheduler/SchedulerDueTask.php
+++ b/src/Test/Constraint/Scheduler/SchedulerDueTask.php
@@ -7,6 +7,7 @@
 use PHPUnit\Framework\Constraint\Constraint;
 use SchedulerBundle\SchedulerInterface;
 
+use Throwable;
 use function sprintf;
 
 /**
@@ -28,9 +29,16 @@ public function toString(): string
 
     /**
      * @param mixed|SchedulerInterface $other
+     * @throws Throwable {@see SchedulerInterface::getDueTasks()}
      */
     protected function matches($other): bool
     {
-        return $this->expectedCount === $other->getDueTasks()->count();
+        if (!$other instanceof SchedulerInterface) {
+            return false;
+        }
+
+        $dueTasks = $other->getDueTasks();
+
+        return $this->expectedCount === $dueTasks->count();
     }
 }
diff --git a/src/Test/Constraint/TaskExecuted.php b/src/Test/Constraint/TaskExecuted.php
index 743e9324..eb5666ea 100644
--- a/src/Test/Constraint/TaskExecuted.php
+++ b/src/Test/Constraint/TaskExecuted.php
@@ -33,6 +33,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
+        if (!$other instanceof TaskEventList) {
+            return false;
+        }
+
         return $this->expectedCount === $this->countExecutedTasks($other);
     }
 
@@ -44,7 +48,9 @@ private function countExecutedTasks(TaskEventList $taskEventList): int
                 continue;
             }
 
-            if (TaskInterface::SUCCEED !== $taskEvent->getTask()->getExecutionState()) {
+            $task = $taskEvent->getTask();
+
+            if (TaskInterface::SUCCEED !== $task->getExecutionState()) {
                 continue;
             }
 
diff --git a/src/Test/Constraint/TaskFailed.php b/src/Test/Constraint/TaskFailed.php
index c4c4b3f4..5fac5515 100644
--- a/src/Test/Constraint/TaskFailed.php
+++ b/src/Test/Constraint/TaskFailed.php
@@ -8,7 +8,6 @@
 use SchedulerBundle\Event\TaskEventList;
 
 use function count;
-use function is_countable;
 use function sprintf;
 
 /**
@@ -33,6 +32,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
-        return $this->expectedCount === (is_countable($other->getFailedTaskEvents()) ? count($other->getFailedTaskEvents()) : 0);
+        if (!$other instanceof TaskEventList) {
+            return false;
+        }
+
+        return $this->expectedCount === count($other->getFailedTaskEvents());
     }
 }
diff --git a/src/Test/Constraint/TaskQueued.php b/src/Test/Constraint/TaskQueued.php
index 443eece6..295ef7e8 100644
--- a/src/Test/Constraint/TaskQueued.php
+++ b/src/Test/Constraint/TaskQueued.php
@@ -32,6 +32,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
+        if (!$other instanceof TaskEventList) {
+            return false;
+        }
+
         return $this->expectedCount === $this->countQueuedTasks($other);
     }
 
@@ -43,7 +47,9 @@ private function countQueuedTasks(TaskEventList $taskEventList): int
                 continue;
             }
 
-            if (!$taskEvent->getTask()->isQueued()) {
+            $task = $taskEvent->getTask();
+
+            if (!$task->isQueued()) {
                 continue;
             }
 
diff --git a/src/Test/Constraint/TaskScheduled.php b/src/Test/Constraint/TaskScheduled.php
index 3e31603a..3620e724 100644
--- a/src/Test/Constraint/TaskScheduled.php
+++ b/src/Test/Constraint/TaskScheduled.php
@@ -32,6 +32,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
-        return $this->expectedCount === (is_countable($other->getScheduledTaskEvents()) ? count($other->getScheduledTaskEvents()) : 0);
+        if (!$other instanceof TaskEventList) {
+            return false;
+        }
+
+        return $this->expectedCount === count($other->getScheduledTaskEvents());
     }
 }
diff --git a/src/Test/Constraint/TaskUnscheduled.php b/src/Test/Constraint/TaskUnscheduled.php
index 1711fc9f..94936c22 100644
--- a/src/Test/Constraint/TaskUnscheduled.php
+++ b/src/Test/Constraint/TaskUnscheduled.php
@@ -32,6 +32,10 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
-        return $this->expectedCount === (is_countable($other->getUnscheduledTaskEvents()) ? count($other->getUnscheduledTaskEvents()) : 0);
+        if (!$other instanceof TaskEventList) {
+            return false;
+        }
+
+        return $this->expectedCount === count($other->getUnscheduledTaskEvents());
     }
 }
diff --git a/src/Worker/Worker.php b/src/Worker/Worker.php
index 06b64bac..cbfc0c3f 100644
--- a/src/Worker/Worker.php
+++ b/src/Worker/Worker.php
@@ -118,7 +118,10 @@ public function execute(WorkerConfiguration $configuration, TaskInterface ...$ta
      */
     public function preempt(TaskListInterface $preemptTaskList, TaskListInterface $toPreemptTasksList): void
     {
-        $nonExecutedTasks = $toPreemptTasksList->slice(...$preemptTaskList->map(func: static fn (TaskInterface $task): string => $task->getName(), keepKeys: false));
+        /** @var string[] $taskNameList */
+        $taskNameList = $preemptTaskList->map(func: static fn (TaskInterface $task): string => $task->getName(), keepKeys: false);
+
+        $nonExecutedTasks = $toPreemptTasksList->slice(...$taskNameList);
         $nonExecutedTasks->walk(func: function (TaskInterface $task): void {
             $accessLockBag = $task->getAccessLockBag();
 
diff --git a/tests/Bridge/Redis/Transport/RedisTransportFactoryTest.php b/tests/Bridge/Redis/Transport/RedisTransportFactoryTest.php
index ade83f73..6a03c374 100644
--- a/tests/Bridge/Redis/Transport/RedisTransportFactoryTest.php
+++ b/tests/Bridge/Redis/Transport/RedisTransportFactoryTest.php
@@ -49,7 +49,7 @@ public function testTransportCanBeBuilt(): void
         self::assertSame($dsn->getPort(), $transport->getConfiguration()->get('port'));
         self::assertSame($dsn->getScheme(), $transport->getConfiguration()->get('scheme'));
         self::assertSame($dsn->getOption('timeout', 30), $transport->getConfiguration()->get('timeout'));
-        self::assertSame($dsn->getOption('auth'), $this->transport->getConfiguration()->get('auth'));
+        self::assertSame($dsn->getOption('auth'), $transport->getConfiguration()->get('auth'));
         self::assertArrayHasKey('execution_mode', $transport->getConfiguration()->toArray());
         self::assertSame('first_in_first_out', $transport->getConfiguration()->get('execution_mode'));
         self::assertArrayHasKey('list', $transport->getConfiguration()->toArray());