diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
new file mode 100644
index 0000000..438e5dd
--- /dev/null
+++ b/.github/workflows/run-tests.yml
@@ -0,0 +1,43 @@
+name: Unit Tests
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - "*"
+  schedule:
+  - cron: '0 0 * * *'
+
+jobs:
+  php-tests:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    env:
+      COMPOSER_NO_INTERACTION: 1
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [8.1, 8.0, 7.4, 7.3, 7.2]
+
+    name: P${{ matrix.php }}
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+        coverage: none
+        tools: composer:v2
+
+    - name: Install dependencies
+      run: |
+        composer install -o --quiet
+
+    - name: Execute Unit Tests
+      run: composer test
diff --git a/.gitignore b/.gitignore
index 8879189..6bef520 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 composer.phar
 composer.lock
 .DS_Store
+.phpunit.result.cache
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index d0ba93c..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-language: php
-
-php:
-  - 5.5
-  - 5.6
-  - 7.1
-  - 7.2
-  - 7.3
-  - 7.4
-
-before_script:
-  - curl -s http://getcomposer.org/installer | php
-  - php composer.phar install --dev
-
-script: phpunit
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 5c937a9..ff3df84 100644
--- a/composer.json
+++ b/composer.json
@@ -12,10 +12,10 @@
     ],
 
     "require": {
-        "php": ">=7.1.3",
-        "illuminate/support": "^7.0|^8.0",
-        "illuminate/database": "^7.0|^8.0",
-        "illuminate/events": "^7.0|^8.0"
+        "php": "^7.2.5|^8.0",
+        "illuminate/support": "^7.0|^8.0|^9.0",
+        "illuminate/database": "^7.0|^8.0|^9.0",
+        "illuminate/events": "^7.0|^8.0|^9.0"
     },
 
     "autoload": {
@@ -25,7 +25,7 @@
     },
 
     "require-dev": {
-        "phpunit/phpunit": "7.*"
+        "phpunit/phpunit": "7.*|8.*|9.*"
     },
 
     "minimum-stability": "dev",
@@ -41,5 +41,10 @@
                 "Kalnoy\\Nestedset\\NestedSetServiceProvider"
             ]
         }
+    },
+    "scripts": {
+        "test": [
+            "@php ./vendor/bin/phpunit"
+        ]
     }
 }
diff --git a/tests/NodeTest.php b/tests/NodeTest.php
index 7c2fbae..3b0831a 100644
--- a/tests/NodeTest.php
+++ b/tests/NodeTest.php
@@ -5,7 +5,7 @@
 
 class NodeTest extends PHPUnit\Framework\TestCase
 {
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         $schema = Capsule::schema();
 
@@ -23,7 +23,7 @@ public static function setUpBeforeClass()
         Capsule::enableQueryLog();
     }
 
-    public function setUp()
+    public function setUp(): void
     {
         $data = include __DIR__.'/data/categories.php';
 
@@ -36,7 +36,7 @@ public function setUp()
         date_default_timezone_set('America/Denver');
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         Capsule::table('categories')->truncate();
     }
@@ -221,32 +221,29 @@ public function testCategoryMovesUp()
         $this->assertNodeReceivesValidValues($node);
     }
 
-    /**
-     * @expectedException Exception
-     */
     public function testFailsToInsertIntoChild()
     {
+        $this->expectException(Exception::class);
+
         $node = $this->findCategory('notebooks');
         $target = $node->children()->first();
 
         $node->afterNode($target)->save();
     }
 
-    /**
-     * @expectedException Exception
-     */
     public function testFailsToAppendIntoItself()
     {
+        $this->expectException(Exception::class);
+
         $node = $this->findCategory('notebooks');
 
         $node->appendToNode($node)->save();
     }
 
-    /**
-     * @expectedException Exception
-     */
     public function testFailsToPrependIntoItself()
     {
+        $this->expectException(Exception::class);
+
         $node = $this->findCategory('notebooks');
 
         $node->prependTo($node)->save();
@@ -338,11 +335,10 @@ public function testParentIdAttributeAccessorAppendsNode()
         $this->assertTrue($node->isRoot());
     }
 
-    /**
-     * @expectedException Exception
-     */
     public function testFailsToSaveNodeUntilNotInserted()
     {
+        $this->expectException(Exception::class);
+
         $node = new Category;
         $node->save();
     }
@@ -405,11 +401,10 @@ public function testSoftDeletedNodeisDeletedWhenParentIsDeleted()
         $this->assertNull($this->findCategory('sony'));
     }
 
-    /**
-     * @expectedException Exception
-     */
     public function testFailsToSaveNodeUntilParentIsSaved()
     {
+        $this->expectException(Exception::class);
+
         $node = new Category(array('title' => 'Node'));
         $parent = new Category(array('title' => 'Parent'));
 
@@ -641,11 +636,10 @@ public function testDescendantsOfNonExistingNode()
         $this->assertTrue($node->getDescendants()->isEmpty());
     }
 
-    /**
-     * @expectedException \Illuminate\Database\Eloquent\ModelNotFoundException
-     */
     public function testWhereDescendantsOf()
     {
+        $this->expectException(\Illuminate\Database\Eloquent\ModelNotFoundException::class);
+
         Category::whereDescendantOf(124)->get();
     }
 
@@ -852,11 +846,10 @@ public function testRebuildTreeWithDeletion()
         $this->assertTrue($nodes->count() > 1);
     }
 
-    /**
-     * @expectedException \Illuminate\Database\Eloquent\ModelNotFoundException
-     */
     public function testRebuildFailsWithInvalidPK()
     {
+        $this->expectException(\Illuminate\Database\Eloquent\ModelNotFoundException::class);
+
         Category::rebuildTree([ [ 'id' => 24 ] ]);
     }
 
diff --git a/tests/ScopedNodeTest.php b/tests/ScopedNodeTest.php
index f1c6921..c0eac24 100644
--- a/tests/ScopedNodeTest.php
+++ b/tests/ScopedNodeTest.php
@@ -5,7 +5,7 @@
 
 class ScopedNodeTest extends PHPUnit\Framework\TestCase
 {
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         $schema = Capsule::schema();
 
@@ -23,7 +23,7 @@ public static function setUpBeforeClass()
         Capsule::enableQueryLog();
     }
 
-    public function setUp()
+    public function setUp(): void
     {
         $data = include __DIR__.'/data/menu_items.php';
 
@@ -36,7 +36,7 @@ public function setUp()
         date_default_timezone_set('America/Denver');
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
         Capsule::table('menu_items')->truncate();
     }
@@ -159,11 +159,10 @@ public function testInsertion()
         $this->assertOtherScopeNotAffected();
     }
 
-    /**
-     * @expectedException \Illuminate\Database\Eloquent\ModelNotFoundException
-     */
     public function testInsertionToParentFromOtherScope()
     {
+        $this->expectException(\Illuminate\Database\Eloquent\ModelNotFoundException::class);
+
         $node = MenuItem::create([ 'menu_id' => 2, 'parent_id' => 5 ]);
     }
 
@@ -201,22 +200,20 @@ protected function assertOtherScopeNotAffected()
         MenuItem::scoped([ 'menu_id' => 2 ])->rebuildTree($data);
     }*/
 
-    /**
-     * @expectedException LogicException
-     */
     public function testAppendingToAnotherScopeFails()
     {
+        $this->expectException(LogicException::class);
+
         $a = MenuItem::find(1);
         $b = MenuItem::find(3);
 
         $a->appendToNode($b)->save();
     }
 
-    /**
-     * @expectedException LogicException
-     */
     public function testInsertingBeforeAnotherScopeFails()
     {
+        $this->expectException(LogicException::class);
+
         $a = MenuItem::find(1);
         $b = MenuItem::find(3);