diff --git a/.travis.yml b/.travis.yml
index cdfef54..a174ff2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,9 @@
 language: php
 
 php:
-  - 7.0
-  - 7.1
+  - 7.3
+  - 7.4
+  - 8.0
 
 before_script:
   - travis_retry composer self-update
diff --git a/composer.json b/composer.json
index bda0683..b15a10e 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.1 || ^8.0",
         "illuminate/support": "^5.5|^6.0|^7.0",
         "illuminate/console": "^5.5|^6.0|^7.0",
         "thruway/client": "^0.5",
@@ -20,7 +20,7 @@
         "phpunit/phpunit": "^7|^8|^9",
         "mockery/mockery": "0.9.*|^1.0",
         "squizlabs/php_codesniffer": "^3.2",
-        "friendsofphp/php-cs-fixer": "^2.11"
+        "friendsofphp/php-cs-fixer": "^3.0"
     },
     "autoload": {
         "psr-0": {
diff --git a/phpunit.xml b/phpunit.xml
index f69c9fa..e35e242 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -8,7 +8,6 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="false"
 >
     <testsuites>
         <testsuite name="unit">
diff --git a/src/Vinelab/Minion/Client.php b/src/Vinelab/Minion/Client.php
index f2eb77f..943c626 100644
--- a/src/Vinelab/Minion/Client.php
+++ b/src/Vinelab/Minion/Client.php
@@ -63,7 +63,7 @@ public function onSessionStart($session, $transport)
         // also no longer a method on the Client class.
         // Shush the logs.
         // $this->getManager()->setQuiet(true);
-        
+
         // Boot up providers
         $this->bootProviders();
     }
@@ -252,7 +252,6 @@ public function wrapWithProxy($callback, $isFunction = false)
         // We will wrap the callback with a Closure so that we can format the kwArgs that we receive
         // into our proprietary Dictionary instance to make things safer.
         return function ($args, $kwArgs, $details) use ($callback, $isFunction, $provider) {
-
             if (is_string($callback) && !$isFunction && $provider instanceof Provider) {
                 $callback = [$provider, $callback];
             }
diff --git a/src/Vinelab/Minion/Minion.php b/src/Vinelab/Minion/Minion.php
index 28646f5..75639ee 100644
--- a/src/Vinelab/Minion/Minion.php
+++ b/src/Vinelab/Minion/Minion.php
@@ -84,7 +84,7 @@ public function run($options = [], LoopInterface $loop = null)
 
     /**
      * Get a new Client instance.
-     * 
+     *
      * @param \React\EventLoop\LoopInterface $loop
      *
      * @return \Vinelab\Minion\Client
@@ -113,10 +113,9 @@ public function transportUrl()
     {
         $proto = $this->getConfig('tls') ? 'wss' : 'ws';
         $port = intval($this->getConfig('port'));
-        if($port>0) {
+        if ($port>0) {
             $port = ':'.$port;
-        }
-        else {
+        } else {
             $port = '';
         }
         return $proto.'://'.$this->getConfig('host').$port.$this->getConfig('path');
diff --git a/tests/UnitTestCase.php b/tests/UnitTestCase.php
index 7366001..1589474 100644
--- a/tests/UnitTestCase.php
+++ b/tests/UnitTestCase.php
@@ -5,7 +5,7 @@
  */
 class UnitTestCase extends PHPUnit\Framework\TestCase
 {
-    public function test_running()
+    public function test_running(): void
     {
         $this->asserttrue(true);
     }
diff --git a/tests/unit/ClientTest.php b/tests/unit/ClientTest.php
index 29d2bbf..907bdb2 100644
--- a/tests/unit/ClientTest.php
+++ b/tests/unit/ClientTest.php
@@ -8,26 +8,26 @@
  */
 class ClientTest extends UnitTestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         parent::setUp();
 
         $this->client = M::mock(new Client('i.the.divine', []));
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         M::close();
     }
 
-    public function test_initializing_sets_providers()
+    public function test_initializing_sets_providers(): void
     {
         $providers = ['prov1', 'prov2'];
         $c = new Client('julia.dream', $providers);
         $this->assertEquals($providers, $c->getProviders());
     }
 
-    public function test_on_session_start_boots_providers()
+    public function test_on_session_start_boots_providers(): void
     {
         $called = [];
 
@@ -49,7 +49,7 @@ public function test_on_session_start_boots_providers()
         $this->assertInstanceOf('Vinelab\Minion\Client', $called['andMe']);
     }
 
-    public function test_preparing_topic()
+    public function test_preparing_topic(): void
     {
         $this->client->setTopicPrefix('some.topic.prefix.');
 
@@ -59,7 +59,7 @@ public function test_preparing_topic()
         $this->assertEquals('some.topic.prefix.', $this->client->getTopicPrefix());
     }
 
-    public function test_subscribing_with_provider_method()
+    public function test_subscribing_with_provider_method(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -79,7 +79,7 @@ public function test_subscribing_with_provider_method()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_subscribing_with_options()
+    public function test_subscribing_with_options(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -96,7 +96,7 @@ public function test_subscribing_with_options()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_registering_with_options()
+    public function test_registering_with_options(): void
     {
         $session = M::mock('Thruway\ClientSession');
 
@@ -115,7 +115,7 @@ public function test_registering_with_options()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_registering_with_function()
+    public function test_registering_with_function(): void
     {
         $session = M::mock('Thruway\ClientSession');
 
@@ -135,7 +135,7 @@ public function test_registering_with_function()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_registering_prepares_topic()
+    public function test_registering_prepares_topic(): void
     {
         $session = M::mock('Thruway\ClientSession');
 
@@ -155,7 +155,7 @@ public function test_registering_prepares_topic()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_calling_simple()
+    public function test_calling_simple(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -171,7 +171,7 @@ public function test_calling_simple()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_calling_full()
+    public function test_calling_full(): void
     {
         $topic = 'pub.topic';
         $arguments = ['dddddata' => 'hhhhhere'];
@@ -190,7 +190,7 @@ public function test_calling_full()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_calling_prepares_topic()
+    public function test_calling_prepares_topic(): void
     {
         $topic = 'pub.topic';
         $prefixed = 'test.test.pub.test.pub.topic';
@@ -211,7 +211,7 @@ public function test_calling_prepares_topic()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_registering_with_provider_method()
+    public function test_registering_with_provider_method(): void
     {
         $session = M::mock('Thruway\ClientSession');
 
@@ -231,7 +231,7 @@ public function test_registering_with_provider_method()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_registering_with_closure()
+    public function test_registering_with_closure(): void
     {
         $session = M::mock('Thruway\ClientSession');
 
@@ -253,7 +253,7 @@ public function test_registering_with_closure()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_publishing_prepares_topic()
+    public function test_publishing_prepares_topic(): void
     {
         $topic = 'pub.topic';
         $prefixed = 'test.test.pub.test.pub.topic';
@@ -274,7 +274,7 @@ public function test_publishing_prepares_topic()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_publishing_simple()
+    public function test_publishing_simple(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -290,7 +290,7 @@ public function test_publishing_simple()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_subscribing_prepares_topic()
+    public function test_subscribing_prepares_topic(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -307,7 +307,7 @@ public function test_subscribing_prepares_topic()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_subscribing_with_function()
+    public function test_subscribing_with_function(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -321,7 +321,7 @@ public function test_subscribing_with_function()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_subscribing_with_closure()
+    public function test_subscribing_with_closure(): void
     {
         $session = M::mock('Thruway\ClientSession');
         $promise = M::mock('React\Promise\Promise');
@@ -336,7 +336,7 @@ public function test_subscribing_with_closure()
         $this->assertEquals($promise, $got);
     }
 
-    public function test_publishing_full()
+    public function test_publishing_full(): void
     {
         $topic = 'pub.topic';
         $arguments = ['dddddata' => 'hhhhhere'];
diff --git a/tests/unit/DictionaryTest.php b/tests/unit/DictionaryTest.php
index 90869d4..51ed13b 100644
--- a/tests/unit/DictionaryTest.php
+++ b/tests/unit/DictionaryTest.php
@@ -7,7 +7,7 @@
  */
 class DictionaryTest extends PHPUnit\Framework\TestCase
 {
-    public function test_initializing_dictionary()
+    public function test_initializing_dictionary(): void
     {
         $dict = Dictionary::make(['nick' => 'cave', 'back' => 'seeds']);
 
@@ -15,7 +15,7 @@ public function test_initializing_dictionary()
         $this->assertEquals('seeds', $dict->back);
     }
 
-    public function test_initializing_with_object()
+    public function test_initializing_with_object(): void
     {
         $data = new StdClass();
         $data->into = 'my arms';
@@ -27,7 +27,7 @@ public function test_initializing_with_object()
         $this->assertEquals('angels', $data->believe);
     }
 
-    public function test_array_representation()
+    public function test_array_representation(): void
     {
         $flying = new StdClass();
         $flying->wings = 2;
@@ -55,7 +55,7 @@ public function test_array_representation()
         $this->assertEquals($expected, $dict->toArray());
     }
 
-    public function test_allows_checking_attributes()
+    public function test_allows_checking_attributes(): void
     {
         $data = ['lime' => 'tree', 'cherry'];
         $dict = Dictionary::make($data);
diff --git a/tests/unit/MinionTest.php b/tests/unit/MinionTest.php
index 4207dc1..e40d371 100644
--- a/tests/unit/MinionTest.php
+++ b/tests/unit/MinionTest.php
@@ -1,27 +1,27 @@
 <?php
 
 use Vinelab\Minion\Minion;
+use Vinelab\Minion\InvalidProviderException;
 
 /**
  * @author Abed Halawi <abed.halawi@vinelab.com>
  */
 class MinionTest extends PHPUnit\Framework\TestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         $this->m = new Minion();
     }
 
-    /**
-     * @expectedException Vinelab\Minion\InvalidProviderException
-     * @expectedExceptionMessage Provider NonProvider must be an instance of \Vinelab\Minion\Provider
-     */
-    public function test_registering_non_provider_fails()
+    public function test_registering_non_provider_fails(): void
     {
+        $this->expectException(InvalidProviderException::class);
+        $this->expectExceptionMessage('Provider NonProvider must be an instance of \Vinelab\Minion\Provider');
+
         $this->m->register('NonProvider');
     }
 
-    public function test_does_not_register_duplicates()
+    public function test_does_not_register_duplicates(): void
     {
         $this->m->register('AProvider');
         $this->m->register('AProvider');
@@ -43,12 +43,12 @@ public function test_default_config()
         $this->assertEquals($default, $this->m->getConfig());
     }
 
-    public function test_getting_config_param()
+    public function test_getting_config_param(): void
     {
         $this->assertEquals('minion', $this->m->getConfig('realm'));
     }
 
-    public function test_merging_config()
+    public function test_merging_config(): void
     {
         $options = [
             'realm' => 'secrets',
@@ -60,14 +60,14 @@ public function test_merging_config()
         $this->assertEquals($merged, $this->m->getConfig());
     }
 
-    public function test_config_tls()
+    public function test_config_tls(): void
     {
         $this->assertEquals(false, $this->m->getConfig('tls'));
         $this->m->mergeConfig(['tls'=>true]);
         $this->assertEquals(true, $this->m->getConfig('tls'));
     }
 
-    public function test_config_path()
+    public function test_config_path(): void
     {
         $path = '/websocket';
         $this->assertEquals('/ws', $this->m->getConfig('path'));
diff --git a/tests/unit/ProviderTest.php b/tests/unit/ProviderTest.php
index 30671dd..8bb9474 100644
--- a/tests/unit/ProviderTest.php
+++ b/tests/unit/ProviderTest.php
@@ -8,18 +8,18 @@
  */
 class ProviderTest extends UnitTestCase
 {
-    public function setUp()
+    public function setUp(): void
     {
         $this->client = new Client('the-realm', []);
         $this->provider = new ProviderStub($this->client);
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         M::close();
     }
 
-    public function test_initializing_sets_client()
+    public function test_initializing_sets_client(): void
     {
         $getClient = $this->unProtectMethod('getClient', $this->provider);
         $this->assertEquals($this->client, $getClient->invoke($this->provider));