diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..0ffab46
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,42 @@
+name: Tests
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ['8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v6
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: json, tokenizer, filter, mbstring
+          tools: composer:v2
+          coverage: none
+
+      - name: Validate Composer metadata
+        run: composer validate --strict
+
+      - name: Install dependencies
+        run: composer install --no-interaction --prefer-dist
+
+      - name: Run tests
+        run: composer test
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 09eb8a4..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-language: php
-dist: trusty
-php:
-  - 7.1
-  - 7.2
-  - hhvm
-matrix:
-    allow_failures:
-      - php: hhvm
diff --git a/composer.json b/composer.json
index c8c8f15..220f584 100644
--- a/composer.json
+++ b/composer.json
@@ -1,30 +1,33 @@
 {
-	"name": "vanderlee/swaggergen",
-	"description": "Generate Swagger/OpenAPI documentation from simple PHPdoc-like comments in PHP source code.",
-	"type": "library",
-	"keywords": ["swagger", "openapi", "doc", "documentation", "rest", "api", "documentor", "comments", "generate", "generator"],
-	"homepage": "https://github.com/vanderlee/PHPSwaggerGen",
-	"license": "MIT",
-	"support": {
-		"issues": "https://github.com/vanderlee/PHPSwaggerGen/issues",
-		"source": "https://github.com/vanderlee/PHPSwaggerGen/"
-	},
-	"require": {
-		"php": ">=8.0",
-		"ext-json": "*",
-		"ext-tokenizer": "*",
-		"ext-filter": "*",
-		"ext-mbstring": "*"
-	},
-	"suggest": {
-		"ext-yaml": "Allows producing Swagger docs in Yaml format"
-	},
-	"autoload": {
-		"psr-4": {
-			"SwaggerGen\\": "SwaggerGen/"
-		}
-	},
-	"require-dev": {
-		"phpunit/phpunit": "10"
-	}
+    "name": "vanderlee/swaggergen",
+    "description": "Generate Swagger/OpenAPI documentation from simple PHPdoc-like comments in PHP source code.",
+    "type": "library",
+    "keywords": ["swagger", "openapi", "doc", "documentation", "rest", "api", "documentor", "comments", "generate", "generator"],
+    "homepage": "https://github.com/vanderlee/PHPSwaggerGen",
+    "license": "MIT",
+    "support": {
+        "issues": "https://github.com/vanderlee/PHPSwaggerGen/issues",
+        "source": "https://github.com/vanderlee/PHPSwaggerGen/"
+    },
+    "require": {
+        "php": ">=8.0",
+        "ext-json": "*",
+        "ext-tokenizer": "*",
+        "ext-filter": "*",
+        "ext-mbstring": "*"
+    },
+    "suggest": {
+        "ext-yaml": "Allows producing Swagger docs in YAML format"
+    },
+    "autoload": {
+        "psr-4": {
+            "SwaggerGen\\": "SwaggerGen/"
+        }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.6 || ^10.5 || ^11.5"
+    },
+    "scripts": {
+        "test": "phpunit"
+    }
 }
diff --git a/phpunit.xml b/phpunit.xml
index 7fec2bd..bfc0238 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,12 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="tests/bootstrap.php"
-         colors="true"
-         processIsolation="false"
-         verbose="true"
-         debug="true">
-  <testsuites>
-    <testsuite name="SwaggerGen">
-      <directory>tests</directory>
-    </testsuite>
-  </testsuites>
-</phpunit>
\ No newline at end of file
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="tests/bootstrap.php"
+         colors="true"
+         processIsolation="false">
+  <testsuites>
+    <testsuite name="SwaggerGen">
+      <directory>tests</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/tests/SwaggerGenTest.php b/tests/SwaggerGenTest.php
index df71b38..fd3e4d6 100644
--- a/tests/SwaggerGenTest.php
+++ b/tests/SwaggerGenTest.php
@@ -92,7 +92,7 @@ public function testGetSwagger_JSON_Pretty()
 			response 202
 		'), array(), SwaggerGen::FORMAT_JSON_PRETTY);
 
-        $this->assertStringEqualsStringIgnoringLineEndings(<<<JSON
+        $expected = <<<JSON
 {
     "swagger": "2.0",
     "info": {
@@ -111,7 +111,13 @@ public function testGetSwagger_JSON_Pretty()
         }
     }
 }
-JSON, $output);
+JSON;
+
+        $normalizeLineEndings = static function ($value) {
+            return str_replace(array("\r\n", "\r"), "\n", $value);
+        };
+
+        $this->assertSame($normalizeLineEndings($expected), $normalizeLineEndings($output));
     }
 
     /**
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 3ca9812..e13b507 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,5 +1,9 @@
 <?php
 
+if (!class_exists('SwaggerGen_TestCase', false)) {
+    class_alias('PHPUnit\\Framework\\TestCase', 'SwaggerGen_TestCase');
+}
+
 spl_autoload_register(function ($classname) {
     $file = dirname(__DIR__) . DIRECTORY_SEPARATOR . str_replace('\\', DIRECTORY_SEPARATOR, $classname) . '.php';
     if (is_file($file)) {
diff --git a/tests/output/OutputTest.php b/tests/output/OutputTest.php
index 4845588..3eee0aa 100644
--- a/tests/output/OutputTest.php
+++ b/tests/output/OutputTest.php
@@ -15,7 +15,7 @@ public function testAllCases($name, $files, $expected)
     {
         $SwaggerGen = new SwaggerGen('example.com', '/base');
         $actual = $SwaggerGen->getSwagger($files, array(), SwaggerGen::FORMAT_JSON);
-        $this->assertJsonStringEqualsJsonString($expected, $this->normalizeJson($actual), $name);
+        $this->assertJsonStringEqualsJsonString($expected, self::normalizeJson($actual), $name);
     }
 
     /**
@@ -26,7 +26,7 @@ public function testAllCases($name, $files, $expected)
      * @param string $json
      * @return string
      */
-    private function normalizeJson($json)
+    private static function normalizeJson($json)
     {
         return json_encode(
             json_decode($json),
@@ -34,13 +34,13 @@ private function normalizeJson($json)
         );
     }
 
-    public function provideAllCases()
+    public static function provideAllCases()
     {
         $cases = array();
 
         foreach (glob(__DIR__ . '/*', GLOB_ONLYDIR) as $dir) {
             $path = realpath($dir);
-            $json = $this->normalizeJson(file_get_contents($path . '/expected.json'));
+            $json = self::normalizeJson(file_get_contents($path . '/expected.json'));
 
             $files = array();
             if (file_exists($path . '/source.php')) {