diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index f28917a..b4e446e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,8 +11,7 @@ on:
       - .htaccess
       - '**.md'
     branches:
-      - master
-      - '5'
+      - '6'
   pull_request:
     paths-ignore:
       - .chglog/**
@@ -24,29 +23,27 @@ on:
       - .htaccess
       - '**.md'
     branches:
-      - master
-      - '5'
+      - '6'
 
 jobs:
-  silverstripe-module:
-    name: 🧰 Silverstripe Module Testsuite
-    uses: syntro-opensource/workflows/.github/workflows/silverstripe-module.yml@5
+  silverstripe-module-6:
+    name: 🧰 Silverstripe Module Testsuite 6
+    uses: syntro-opensource/workflows/.github/workflows/silverstripe-module-6.yml@master
     with:
       phpunit: true
       phpunit_config_file: tests/phpunit.xml
       phpstan: true
       phpstan_config: tests/phpstan.neon
       phpstan_bootstrap: tests/bootstrap-phpstan.php
-      phpcs: true
-  # silverstripe-client:
-  #   name: 📦 Client Testsuite
-  #   uses: syntro-opensource/workflows/.github/workflows/client.yml@master
-  #   with:
-  #     eslint: true
-  #     eslint_dir: client/src/seo-field/
-  #     eslint_configfile: client/src/seo-field/.eslintrc
-  #     eslint_ext:
-  #     eslint_max-warnings:
-  #     stylelint: true
-  #     stylelint_glob: client/src/seo-field/**/*.scss
-  #     stylelint_max-warnings:
+  silverstripe-module-codecoverage:
+    name: 📊 Silverstripe Code Coverage
+    uses: syntro-opensource/workflows/.github/workflows/silverstripe-module-codecoverage.yml@master
+    with:
+      php_version: 8.3
+      silverstripe_version: 6.0
+      phpunit_config_file: tests/phpunit.xml
+  silverstripe-phpcs:
+    name: 🧹 Silverstripe PHPCS
+    uses: syntro-opensource/workflows/.github/workflows/silverstripe-phpcs.yml@master
+    with:
+      dir: src/
diff --git a/composer.json b/composer.json
index 8c2f727..a672f18 100644
--- a/composer.json
+++ b/composer.json
@@ -22,16 +22,16 @@
         }
     ],
     "require": {
-        "php": "~8.0",
-        "silverstripe/framework": "~5.0",
-        "phpstan/phpstan": "^1.5",
-        "silverstripe/versioned": "^2.0"
+        "php": "~8.3",
+        "silverstripe/framework": "~6.0",
+        "phpstan/phpstan": "^2.0",
+        "silverstripe/versioned": "^3.0"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^3.0",
-        "phpstan/phpstan-phpunit": "^1",
-        "phpunit/phpunit": "^9.4",
-        "silverstripe/cms": "^5.0"
+        "phpstan/phpstan-phpunit": "*",
+        "phpunit/phpunit": "^11.0",
+        "silverstripe/cms": "^6.0"
     },
     "scripts": {
         "phpcs": "phpcs -n -l src/ src/Reflection/ src/Rule/ src/Type tests/ tests/Reflection/ tests/Rule/ tests/Type/",
diff --git a/src/ClassHelper.php b/src/ClassHelper.php
index beafad9..3349b58 100644
--- a/src/ClassHelper.php
+++ b/src/ClassHelper.php
@@ -11,7 +11,7 @@
 class ClassHelper
 {
     // const SSObject = 'Object'; // Removed in SS 4.X
-    const ViewableData = \SilverStripe\View\ViewableData::class;
+    const ModelData = \SilverStripe\Model\ModelData::class;
     const DataObject = \SilverStripe\ORM\DataObject::class;
     const Extensible = \SilverStripe\Core\Extensible::class;
 
diff --git a/tests/Reflection/MethodClassReflectionExtensionTest.php b/tests/Reflection/MethodClassReflectionExtensionTest.php
index 8fd7c97..c9343a8 100644
--- a/tests/Reflection/MethodClassReflectionExtensionTest.php
+++ b/tests/Reflection/MethodClassReflectionExtensionTest.php
@@ -6,16 +6,16 @@
 use PHPStan\Testing\TypeInferenceTestCase;
 use SilverStripe\Core\Config\Config;
 
-class MethodClassReflectionExtensionTest  extends TypeInferenceTestCase
+class MethodClassReflectionExtensionTest extends TypeInferenceTestCase
 {
     /**
      * @return iterable<mixed>
      */
-    public function dataFileAsserts(): iterable
+    public static function dataFileAsserts(): iterable
     {
         // path to a file with actual asserts of expected types:
         require_once(__DIR__ . '/data/method-class-reflection.php');
-        yield from $this->gatherAssertTypes(__DIR__ . '/data/method-class-reflection.php');
+        yield from self::gatherAssertTypes(__DIR__ . '/data/method-class-reflection.php');
     }
 
     /**
diff --git a/tests/Reflection/SiteTreeMethodClassReflectionExtensionTest.php b/tests/Reflection/SiteTreeMethodClassReflectionExtensionTest.php
index 2694c01..817b435 100644
--- a/tests/Reflection/SiteTreeMethodClassReflectionExtensionTest.php
+++ b/tests/Reflection/SiteTreeMethodClassReflectionExtensionTest.php
@@ -15,19 +15,19 @@
 final class SiteTreeMethodClassReflectionExtensionTest extends \PHPStan\Testing\PHPStanTestCase
 {
     /** @var \PHPStan\Broker\Broker */
-    private $broker;
+    private static $broker;
 
     /** @var MethodClassReflectionExtension */
-    private $method;
+    private static $method;
 
     protected function setUp(): void
     {
-        $this->broker = $this->createBroker();
-        $this->method = new MethodClassReflectionExtension();
-        $this->method->setBroker($this->broker);
+        self::$broker = $this->createReflectionProvider();
+        self::$method = new MethodClassReflectionExtension();
+        self::$method->setBroker($this->broker);
     }
 
-    public function dataHasMethod(): array
+    public static function dataHasMethod(): array
     {
         return [
             [
@@ -54,10 +54,10 @@ public function dataHasMethod(): array
      * @param string $method
      * @param bool $result
      */
-    public function testHasMethod(string $className, string $method, bool $result): void
+    public static function testHasMethod(string $className, string $method, bool $result): void
     {
-        $classReflection = $this->broker->getClass($className);
-        self::assertSame($result, $this->method->hasMethod($classReflection, $method));
+        $classReflection = self::$broker->getClass($className);
+        self::assertSame($result, self::$method->hasMethod($classReflection, $method));
     }
 
     public function testParentMethod(): void
@@ -74,10 +74,10 @@ public function testParentMethod(): void
         self::assertSame(ClassHelper::SiteTree, $resultType->getClassName());
     }
 
-    public function testLinkTrackingMethod(): void
+    public static function testLinkTrackingMethod(): void
     {
-        $classReflection = $this->broker->getClass(ClassHelper::SiteTree);
-        $methodReflection = $this->method->getMethod($classReflection, 'LinkTracking');
+        $classReflection = self::$broker->getClass(ClassHelper::SiteTree);
+        $methodReflection = self::$method->getMethod($classReflection, 'LinkTracking');
         self::assertSame('LinkTracking', $methodReflection->getName());
         $dataListType = ParametersAcceptorSelector::selectSingle($methodReflection->getVariants())->getReturnType();
         self::assertSame(DataListType::class, get_class($dataListType));