diff --git a/.travis.yml b/.travis.yml
index e4f850e..0b462f2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,8 @@
 language: php
 php:
-  - '7.1'
-  - '7.2'
+  - '7.3'
+  - '7.4'
+  - '8.0'
   - hhvm
 
 matrix:
@@ -16,7 +17,7 @@ install:
   - php composer.phar install --no-interaction
 
 script:
-  - php vendor/bin/phpunit -c phpunit.xml
+  - XDEBUG_MODE=coverage php vendor/bin/phpunit -c phpunit.xml --coverage-clover clover.xml
 
 after_success:
-  - travis_retry php vendor/bin/coveralls -v
+  - travis_retry php vendor/bin/php-coveralls -v
diff --git a/composer.json b/composer.json
index 8eb3955..b848b9f 100644
--- a/composer.json
+++ b/composer.json
@@ -17,12 +17,12 @@
     ],
     "minimum-stability": "dev",
     "require": {
-        "php": "^7.1",
+        "php": "^7.3 || ^8.0",
         "dragonmantank/cron-expression": "^3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "~5.7",
-        "satooshi/php-coveralls": "^1.0",
+        "phpunit/phpunit": "~9.5",
+        "php-coveralls/php-coveralls": "^2.4",
         "swiftmailer/swiftmailer": "~5.4 || ^6.0"
     },
     "suggest": {
diff --git a/phpunit.xml b/phpunit.xml
index b16eaf9..c29142a 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,28 +1,20 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
-         bootstrap="./vendor/autoload.php"
-         colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false"
-         syntaxCheck="false">
-    <testsuites>
-        <testsuite name="Scheduler Test Suite">
-            <directory>./tests/</directory>
-        </testsuite>
-    </testsuites>
-    <php>
-        <env name="APP_ENV" value="testing"/>
-    </php>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory>src/GO</directory>
-        </whitelist>
-    </filter>
-    <logging>
-        <log type="coverage-clover" target="clover.xml"/>
-    </logging>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" backupStaticAttributes="false" bootstrap="./vendor/autoload.php" colors="true" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory>src/GO</directory>
+    </include>
+    <report>
+      <clover outputFile="clover.xml"/>
+    </report>
+  </coverage>
+  <testsuites>
+    <testsuite name="Scheduler Test Suite">
+      <directory>./tests/</directory>
+    </testsuite>
+  </testsuites>
+  <php>
+    <env name="APP_ENV" value="testing"/>
+  </php>
+  <logging/>
 </phpunit>
diff --git a/tests/GO/IntervalTest.php b/tests/GO/IntervalTest.php
index 24c1d42..9519a73 100644
--- a/tests/GO/IntervalTest.php
+++ b/tests/GO/IntervalTest.php
@@ -32,11 +32,10 @@ public function testShouldRunHourlyWithCustomInput()
         $this->assertTrue($job->hourly(19)->isDue(\DateTime::createFromFormat('H:i', '11:19')));
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldThrowExceptionWithInvalidHourlyMinuteInput()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $job = new Job('ls');
         $job->hourly('abc');
     }
@@ -63,20 +62,18 @@ public function testShouldRunDailyWithCustomInput()
         $this->assertTrue($job->daily('19:53')->isDue(\DateTime::createFromFormat('H:i', '19:53')));
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldThrowExceptionWithInvalidDailyHourInput()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $job = new Job('ls');
         $job->daily('abc');
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldThrowExceptionWithInvalidDailyMinuteInput()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $job = new Job('ls');
         $job->daily(2, 'abc');
     }
diff --git a/tests/GO/JobTest.php b/tests/GO/JobTest.php
index 8d52bc0..1b84cb2 100644
--- a/tests/GO/JobTest.php
+++ b/tests/GO/JobTest.php
@@ -141,11 +141,10 @@ public function testShouldAcceptSingleOrMultipleEmails()
         $this->assertInstanceOf(Job::class, $job->email(['test@mail.com', 'other@mail.com']));
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldFailIfEmailInputIsNotStringOrArray()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $job = new Job('ls');
 
         $job->email(1);
@@ -159,11 +158,10 @@ public function testShouldAcceptEmailConfigurationAndItShouldBeChainable()
         ]));
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldFailIfEmailConfigurationIsNotArray()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $job = new Job('ls');
         $job->configure([
             'email' => 123,
diff --git a/tests/GO/SchedulerTest.php b/tests/GO/SchedulerTest.php
index 2b1717c..9f2204d 100644
--- a/tests/GO/SchedulerTest.php
+++ b/tests/GO/SchedulerTest.php
@@ -62,11 +62,10 @@ public function testShouldUseSystemPhpBinIfCustomBinDoesNotExist()
         $this->assertEquals(PHP_BINARY . ' ' . $script, $job->compile());
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldThrowExceptionIfScriptIsNotAString()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $scheduler = new Scheduler();
         $scheduler->php(function () {
             return false;
@@ -234,8 +233,8 @@ public function testShouldShowClosuresVerboseOutputAsText()
 
         $scheduler->run();
 
-        $this->assertRegexp('/ Executing Closure$/', $scheduler->getVerboseOutput());
-        $this->assertRegexp('/ Executing Closure$/', $scheduler->getVerboseOutput('text'));
+        $this->assertMatchesRegularExpression('/ Executing Closure$/', $scheduler->getVerboseOutput());
+        $this->assertMatchesRegularExpression('/ Executing Closure$/', $scheduler->getVerboseOutput('text'));
     }
 
     public function testShouldShowClosuresVerboseOutputAsHtml()
@@ -254,7 +253,7 @@ public function testShouldShowClosuresVerboseOutputAsHtml()
 
         $scheduler->run();
 
-        $this->assertRegexp('/<br>/', $scheduler->getVerboseOutput('html'));
+        $this->assertMatchesRegularExpression('/<br>/', $scheduler->getVerboseOutput('html'));
     }
 
     public function testShouldShowClosuresVerboseOutputAsArray()
@@ -277,11 +276,10 @@ public function testShouldShowClosuresVerboseOutputAsArray()
         $this->assertEquals(count($scheduler->getVerboseOutput('array')), 2);
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
     public function testShouldThrowExceptionWithInvalidOutputType()
     {
+        $this->expectException(\InvalidArgumentException::class);
+
         $scheduler = new Scheduler();
 
         $scheduler->call(function ($phrase) {