diff --git a/tests/AutoloaderTest.php b/tests/AutoloaderTest.php
index 3dcd88f..d65badb 100644
--- a/tests/AutoloaderTest.php
+++ b/tests/AutoloaderTest.php
@@ -12,7 +12,7 @@
 use Framework\Autoload\Autoloader;
 use PHPUnit\Framework\TestCase;
 
-class AutoloaderTest extends TestCase
+final class AutoloaderTest extends TestCase
 {
     protected Autoloader $autoloader;
 
diff --git a/tests/Debug/AutoloadCollectorTest.php b/tests/Debug/AutoloadCollectorTest.php
index d6b382a..db34a59 100644
--- a/tests/Debug/AutoloadCollectorTest.php
+++ b/tests/Debug/AutoloadCollectorTest.php
@@ -13,7 +13,7 @@
 use Framework\Autoload\Debug\AutoloadCollector;
 use PHPUnit\Framework\TestCase;
 
-class AutoloadCollectorTest extends TestCase
+final class AutoloadCollectorTest extends TestCase
 {
     protected AutoloadCollector $collector;
     protected Autoloader $autoloader;
diff --git a/tests/LocatorTest.php b/tests/LocatorTest.php
index ce6e0c5..da8a8cd 100644
--- a/tests/LocatorTest.php
+++ b/tests/LocatorTest.php
@@ -13,7 +13,7 @@
 use Framework\Autoload\Locator;
 use PHPUnit\Framework\TestCase;
 
-class LocatorTest extends TestCase
+final class LocatorTest extends TestCase
 {
     protected Autoloader $autoloader;
     protected Locator $locator;