diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cb5295b..ac0b2bb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [8.0, 8.1, 8.2]
+        php: [8.1, 8.2, 8.3]
     steps:
       - uses: actions/checkout@v3
       - name: Setup PHP
diff --git a/.gitignore b/.gitignore
index 50b321e..2976cf1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 vendor
 composer.lock
-.phpunit.result.cache
+/.phpunit.cache
diff --git a/composer.json b/composer.json
index cdee5d7..9795148 100644
--- a/composer.json
+++ b/composer.json
@@ -18,15 +18,15 @@
         }
     ],
     "require": {
-        "php": ">=7.2",
+        "php": ">=8.1",
         "ext-json": "*",
-        "illuminate/queue": "5.7.* | 5.8.* | ^6.0 | ^7.0 | ^8.0 | ^9.0|^10.0 | ^11.0",
-        "illuminate/support": "5.7.* | 5.8.* | ^6.0 | ^7.0 | ^8.0 | ^9.0|^10.0 | ^11.0",
+        "illuminate/queue": "5.7.* | 5.8.* | ^6.0 | ^7.0 | ^8.0 | ^9.0| ^10.0 | ^11.0",
+        "illuminate/support": "5.7.* | 5.8.* | ^6.0 | ^7.0 | ^8.0 | ^9.0| ^10.0 | ^11.0",
         "google/cloud-pubsub": "^1.1",
         "ramsey/uuid": "^2.0|^3.0|^4.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0|^9.0 | ^10.5"
+        "phpunit/phpunit": "^10.0"
     },
     "autoload": {
         "psr-4": {
@@ -49,4 +49,4 @@
         }
     },
     "minimum-stability": "stable"
-}
+}
\ No newline at end of file
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 988d7c8..4c8b578 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,25 +1,22 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd"
-    backupGlobals="false"
-    backupStaticAttributes="false"
-    bootstrap="vendor/autoload.php"
-    colors="true"
-    convertErrorsToExceptions="true"
-    convertNoticesToExceptions="true"
-    convertWarningsToExceptions="true"
-    processIsolation="false"
-    stopOnFailure="false"
-    verbose="true">
-    <coverage>
-        <include>
-            <directory suffix=".php">src/</directory>
-        </include>
-    </coverage>
+<phpunit 
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" 
+    backupGlobals="false" 
+    bootstrap="vendor/autoload.php" 
+    colors="true" 
+    processIsolation="false" 
+    stopOnFailure="false" 
+    cacheDirectory=".phpunit.cache" 
+    backupStaticProperties="false">
     <testsuites>
         <testsuite name="tests">
             <directory suffix="Tests.php">./tests/</directory>
         </testsuite>
     </testsuites>
+    <source>
+        <include>
+            <directory suffix=".php">src/</directory>
+        </include>
+    </source>
 </phpunit>
diff --git a/tests/Unit/Connectors/PubSubConnectorTests.php b/tests/Unit/Connectors/PubSubConnectorTests.php
index 052202c..5821831 100644
--- a/tests/Unit/Connectors/PubSubConnectorTests.php
+++ b/tests/Unit/Connectors/PubSubConnectorTests.php
@@ -8,16 +8,16 @@
 use PHPUnit\Framework\TestCase;
 use ReflectionClass;
 
-class PubSubConnectorTests extends TestCase
+final class PubSubConnectorTests extends TestCase
 {
-    public function testImplementsConnectorInterface()
+    public function testImplementsConnectorInterface(): void
     {
         putenv('SUPPRESS_GCLOUD_CREDS_WARNING=true');
         $reflection = new ReflectionClass(PubSubConnector::class);
         $this->assertTrue($reflection->implementsInterface(ConnectorInterface::class));
     }
 
-    public function testConnectReturnsPubSubQueueInstance()
+    public function testConnectReturnsPubSubQueueInstance(): void
     {
         $connector = new PubSubConnector;
         $config = $this->createFakeConfig();
@@ -27,7 +27,7 @@ public function testConnectReturnsPubSubQueueInstance()
         $this->assertEquals($queue->getSubscriberName(), 'test-subscriber');
     }
 
-    public function testQueuePrefixAdded()
+    public function testQueuePrefixAdded(): void
     {
         $connector = new PubSubConnector();
         $config = $this->createFakeConfig() + ['queue_prefix' => 'prefix-'];
@@ -36,7 +36,7 @@ public function testQueuePrefixAdded()
         $this->assertEquals('prefix-my-queue', $queue->getQueue('my-queue'));
     }
 
-    public function testNotQueuePrefixAddedMultipleTimes()
+    public function testNotQueuePrefixAddedMultipleTimes(): void
     {
         $connector = new PubSubConnector();
         $config = $this->createFakeConfig() + ['queue_prefix' => 'prefix-'];
diff --git a/tests/Unit/Jobs/PubSubJobTests.php b/tests/Unit/Jobs/PubSubJobTests.php
index f5a2d58..57acbe1 100644
--- a/tests/Unit/Jobs/PubSubJobTests.php
+++ b/tests/Unit/Jobs/PubSubJobTests.php
@@ -11,7 +11,7 @@
 use PHPUnit\Framework\TestCase;
 use ReflectionClass;
 
-class PubSubJobTests extends TestCase
+final class PubSubJobTests extends TestCase
 {
     /**
      * @var string
@@ -29,31 +29,31 @@ class PubSubJobTests extends TestCase
     protected $messageEncodedData;
 
     /**
-     * @var Container
+     * @var \PHPUnit\Framework\MockObject\MockObject&Container
      */
     protected $container;
 
     /**
-     * @var PubSubQueue
+     * @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue
      */
     protected $queue;
 
     /**
-     * @var PubSubClient
+     * @var \PHPUnit\Framework\MockObject\MockObject&PubSubClient
      */
     protected $client;
 
     /**
-     * @var Message
+     * @var \PHPUnit\Framework\MockObject\MockObject&Message
      */
     protected $message;
 
     /**
-     * @var PubSubJob
+     * @var \PHPUnit\Framework\MockObject\MockObject&PubSubJob
      */
     protected $job;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->messageId = '1234';
         $this->messageData = json_encode(['id' => $this->messageId, 'foo' => 'bar']);
@@ -65,7 +65,7 @@ public function setUp(): void
 
         $this->message = $this->getMockBuilder(Message::class)
             ->setConstructorArgs([[], []])
-            ->setMethods(['data', 'id', 'attributes'])
+            ->onlyMethods(['data', 'id', 'attributes'])
             ->getMock();
 
         $this->message->method('data')
@@ -80,38 +80,38 @@ public function setUp(): void
 
         $this->job = $this->getMockBuilder(PubSubJob::class)
             ->setConstructorArgs([$this->container, $this->queue, $this->message, 'test', 'test'])
-            ->setMethods()
+            ->onlyMethods([])
             ->getMock();
     }
 
-    public function testImplementsJobInterface()
+    public function testImplementsJobInterface(): void
     {
         $reflection = new ReflectionClass(PubSubJob::class);
         $this->assertTrue($reflection->implementsInterface(JobContract::class));
     }
 
-    public function testGetJobId()
+    public function testGetJobId(): void
     {
         $this->assertEquals($this->job->getJobId(), $this->messageId);
     }
 
-    public function testGetRawBody()
+    public function testGetRawBody(): void
     {
         $this->assertEquals($this->job->getRawBody(), $this->messageData);
     }
 
-    public function testDeleteMethodSetDeletedProperty()
+    public function testDeleteMethodSetDeletedProperty(): void
     {
         $this->job->delete();
         $this->assertTrue($this->job->isDeleted());
     }
 
-    public function testAttempts()
+    public function testAttempts(): void
     {
         $this->assertTrue(is_int($this->job->attempts()));
     }
 
-    public function testReleaseAndPublish()
+    public function testReleaseAndPublish(): void
     {
         $this->queue->expects($this->once())
             ->method('republish')
@@ -136,7 +136,7 @@ public function testReleaseAndPublish()
         $this->job->release();
     }
 
-    public function testReleaseMethodSetReleasedProperty()
+    public function testReleaseMethodSetReleasedProperty(): void
     {
         $this->job->release();
         $this->assertTrue($this->job->isReleased());
diff --git a/tests/Unit/PubSubQueueTests.php b/tests/Unit/PubSubQueueTests.php
index 8b36ece..b9a1a7a 100644
--- a/tests/Unit/PubSubQueueTests.php
+++ b/tests/Unit/PubSubQueueTests.php
@@ -14,7 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use ReflectionClass;
 
-class PubSubQueueTests extends TestCase
+final class PubSubQueueTests extends TestCase
 {
     /**
      * @var string
@@ -22,31 +22,31 @@ class PubSubQueueTests extends TestCase
     protected $expectedResult = 'message-id';
 
     /**
-     * @var Topic
+     * @var \PHPUnit\Framework\MockObject\MockObject&Topic
      */
     protected $topic;
 
     /**
-     * @var PubSubClient
+     * @var \PHPUnit\Framework\MockObject\MockObject&PubSubClient
      */
     protected $client;
 
     /**
-     * @var Subscription
+     * @var \PHPUnit\Framework\MockObject\MockObject&Subscription
      */
     protected $subscription;
 
     /**
-     * @var Message
+     * @var \PHPUnit\Framework\MockObject\MockObject&Message
      */
     protected $message;
 
     /**
-     * @var PubSubQueue
+     * @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue
      */
     protected $queue;
 
-    public function setUp(): void
+    protected function setUp(): void
     {
         $this->expectedResult = 'message-id';
 
@@ -57,23 +57,21 @@ public function setUp(): void
 
         $this->queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods([
+            ->onlyMethods([
                 'pushRaw',
                 'getTopic',
-                'exists',
-                'subscription',
                 'availableAt',
                 'subscribeToTopic',
             ])->getMock();
     }
 
-    public function testImplementsQueueInterface()
+    public function testImplementsQueueInterface(): void
     {
         $reflection = new ReflectionClass(PubSubQueue::class);
         $this->assertTrue($reflection->implementsInterface(QueueContract::class));
     }
 
-    public function testPushNewJob()
+    public function testPushNewJob(): void
     {
         $job = 'test';
         $data = ['foo' => 'bar'];
@@ -90,11 +88,12 @@ public function testPushNewJob()
         $this->assertEquals($this->expectedResult, $this->queue->push('test', $data));
     }
 
-    public function testPushRaw()
+    public function testPushRaw(): void
     {
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods(['getTopic', 'subscribeToTopic'])
+            ->onlyMethods(['getTopic', 'subscribeToTopic'])
             ->getMock();
 
         $payload = json_encode(['id' => $this->expectedResult]);
@@ -116,13 +115,14 @@ public function testPushRaw()
         $this->assertEquals($this->expectedResult, $queue->pushRaw($payload));
     }
 
-    public function testPushRawOptionsOnlyAcceptKeyValueStrings()
+    public function testPushRawOptionsOnlyAcceptKeyValueStrings(): void
     {
         $this->expectException(\UnexpectedValueException::class);
 
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods(['getTopic', 'subscribeToTopic'])
+            ->onlyMethods(['getTopic', 'subscribeToTopic'])
             ->getMock();
 
         $this->topic->method('publish')
@@ -148,7 +148,7 @@ public function testPushRawOptionsOnlyAcceptKeyValueStrings()
         $queue->pushRaw($payload, '', $options);
     }
 
-    public function testLater()
+    public function testLater(): void
     {
         $job = 'test';
         $delay = 60;
@@ -185,7 +185,7 @@ public function testLater()
         $this->assertEquals($this->expectedResult, $this->queue->later($delay, $job, ['foo' => 'bar']));
     }
 
-    public function testPopWhenJobsAvailable()
+    public function testPopWhenJobsAvailable(): void
     {
         $this->subscription->expects($this->once())
             ->method('acknowledge');
@@ -210,7 +210,7 @@ public function testPopWhenJobsAvailable()
         $this->assertTrue($this->queue->pop('test') instanceof PubSubJob);
     }
 
-    public function testPopWhenNoJobAvailable()
+    public function testPopWhenNoJobAvailable(): void
     {
         $this->subscription->expects($this->exactly(0))
             ->method('acknowledge');
@@ -230,7 +230,7 @@ public function testPopWhenNoJobAvailable()
         $this->assertTrue(is_null($this->queue->pop('test')));
     }
 
-    public function testPopWhenTopicDoesNotExist()
+    public function testPopWhenTopicDoesNotExist(): void
     {
         $this->queue->method('getTopic')
             ->willReturn($this->topic);
@@ -241,7 +241,7 @@ public function testPopWhenTopicDoesNotExist()
         $this->assertTrue(is_null($this->queue->pop('test')));
     }
 
-    public function testPopWhenJobDelayed()
+    public function testPopWhenJobDelayed(): void
     {
         $delay = 60;
         $timestamp = Carbon::now()->addSeconds($delay)->getTimestamp();
@@ -266,7 +266,7 @@ public function testPopWhenJobDelayed()
         $this->assertTrue(is_null($this->queue->pop('test')));
     }
 
-    public function testBulk()
+    public function testBulk(): void
     {
         $jobs = ['test'];
         $data = ['foo' => 'bar'];
@@ -289,7 +289,7 @@ public function testBulk()
         $this->assertEquals($this->expectedResult, $this->queue->bulk($jobs, $data));
     }
 
-    public function testAcknowledge()
+    public function testAcknowledge(): void
     {
         $this->subscription->expects($this->once())
             ->method('acknowledge');
@@ -303,7 +303,7 @@ public function testAcknowledge()
         $this->queue->acknowledge($this->message);
     }
 
-    public function testRepublish()
+    public function testRepublish(): void
     {
         $options = ['foo' => 'bar'];
         $delay = 60;
@@ -358,7 +358,7 @@ public function testRepublish()
         $this->queue->republish($this->message, 'test', $options, $delay);
     }
 
-    public function testRepublishOptionsOnlyAcceptString()
+    public function testRepublishOptionsOnlyAcceptString(): void
     {
         $this->expectException(\UnexpectedValueException::class);
 
@@ -389,7 +389,7 @@ public function testRepublishOptionsOnlyAcceptString()
         $this->queue->republish($this->message, 'test', $options, $delay);
     }
 
-    public function testGetTopic()
+    public function testGetTopic(): void
     {
         $this->topic->method('exists')
             ->willReturn(true);
@@ -397,15 +397,16 @@ public function testGetTopic()
         $this->client->method('topic')
             ->willReturn($this->topic);
 
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods()
+            ->onlyMethods([])
             ->getMock();
 
         $this->assertTrue($queue->getTopic('test') instanceof Topic);
     }
 
-    public function testCreateTopicAndReturnIt()
+    public function testCreateTopicAndReturnIt(): void
     {
         $this->topic->method('exists')
             ->willReturn(false);
@@ -417,15 +418,16 @@ public function testCreateTopicAndReturnIt()
         $this->client->method('topic')
             ->willReturn($this->topic);
 
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods()
+            ->onlyMethods([])
             ->getMock();
 
         $this->assertTrue($queue->getTopic('test', true) instanceof Topic);
     }
 
-    public function testSubscribtionIsCreated()
+    public function testSubscribtionIsCreated(): void
     {
         $this->topic->method('subscription')
             ->willReturn($this->subscription);
@@ -436,15 +438,16 @@ public function testSubscribtionIsCreated()
         $this->subscription->method('exists')
             ->willReturn(false);
 
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods()
+            ->onlyMethods([])
             ->getMock();
 
         $this->assertTrue($queue->subscribeToTopic($this->topic) instanceof Subscription);
     }
 
-    public function testSubscriptionIsRetrieved()
+    public function testSubscriptionIsRetrieved(): void
     {
         $this->topic->method('subscription')
             ->willReturn($this->subscription);
@@ -452,26 +455,28 @@ public function testSubscriptionIsRetrieved()
         $this->subscription->method('exists')
             ->willReturn(true);
 
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default'])
-            ->setMethods()
+            ->onlyMethods([])
             ->getMock();
 
         $this->assertTrue($queue->subscribeToTopic($this->topic) instanceof Subscription);
     }
 
-    public function testGetSubscriberName()
+    public function testGetSubscriberName(): void
     {
+        /** @var \PHPUnit\Framework\MockObject\MockObject&PubSubQueue $queue */
         $queue = $this->getMockBuilder(PubSubQueue::class)
             ->setConstructorArgs([$this->client, 'default', 'test-subscriber'])
-            ->setMethods()
+            ->onlyMethods([])
             ->getMock();
 
         $this->assertTrue(is_string($queue->getSubscriberName()));
         $this->assertEquals($queue->getSubscriberName(), 'test-subscriber');
     }
 
-    public function testGetPubSub()
+    public function testGetPubSub(): void
     {
         $this->assertTrue($this->queue->getPubSub() instanceof PubSubClient);
     }