diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6d5554c..c2e1285 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,13 +36,13 @@ jobs:
         with:
           php-version: ${{ matrix.php }}
           coverage: none
-          tools: phive
+          tools: phive, composer
 
       - name: Install tools (phive)
         run: phive install --trust-gpg-keys 4AA394086372C20A,2A8299CE842DD38C,E82B2FB314E9906E
 
-      - name: Generate Autoloader (phpab)
-        run: ./tools/phpab --output ./src/autoload.php ./src
+      - name: Generate Autoloader
+        run: composer dump-autoload
 
       - name: Run unit tests (phpunit)
         run: ./tools/phpunit
diff --git a/phpunit.xml b/phpunit.xml
index f7ac8ac..a369694 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,6 +1,6 @@
 <?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" bootstrap="src/autoload.php"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd" bootstrap="vendor/autoload.php"
          backupGlobals="false" beStrictAboutOutputDuringTests="true" beStrictAboutTestsThatDoNotTestAnything="true"
          beStrictAboutTodoAnnotatedTests="true" verbose="true">
 
diff --git a/tests/XMLSerializerTest.php b/tests/XMLSerializerTest.php
index 094b7d6..021b15e 100644
--- a/tests/XMLSerializerTest.php
+++ b/tests/XMLSerializerTest.php
@@ -3,6 +3,7 @@
 
 use  DOMDocument;
 use PHPUnit\Framework\TestCase;
+use ReflectionClass;
 use XMLWriter;
 use function file_get_contents;
 
@@ -14,6 +15,10 @@ class XMLSerializerTest extends TestCase {
     private $tokens;
 
     protected function setUp(): void {
+        $class = new ReflectionClass(XMLSerializer::class);
+        var_dump($class->getFileName());
+        exit();
+
         $this->tokens = unserialize(
             file_get_contents(__DIR__ . '/_files/test.php.tokens'),
             [TokenCollection::class]