diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index c60d461..99d7d66 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -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/11.2/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          bootstrap="vendor/autoload.php"
          cacheDirectory="build/.phpunit.cache"
          colors="true"
diff --git a/tests/Option/data/option.php b/tests/Option/data/option.php
index e6dcf31..c4402d4 100644
--- a/tests/Option/data/option.php
+++ b/tests/Option/data/option.php
@@ -57,8 +57,8 @@ function testOption(Option $option): void
 assertType('Nexus\Option\Some<bool>', (new Some('car'))->and(new Some(true)));
 
 $option = (new Some(2))->andThen(static fn(int $number): Some => new Some((string) ($number ** 2)));
-assertType('Nexus\Option\Some<numeric-string>', $option);
-assertType('numeric-string', $option->unwrap());
+assertType('Nexus\Option\Some<numeric-string&uppercase-string>', $option);
+assertType('numeric-string&uppercase-string', $option->unwrap());
 
 assertType('Nexus\Option\Some<int>', (new Some(2))->or(new None()));
 assertType('Nexus\Option\Some<int>', (new Some(2))->or(new Some('car')));