fixup! [Tests] Added unit test for UnauthorizedException class

Author: alongosz

tests/lib/Base/Exceptions/UnauthorizedExceptionTest.php

@@ -10,6 +10,7 @@
 
 use Ibexa\Core\Base\Exceptions\UnauthorizedException;
 use PHPUnit\Framework\TestCase;
+use Stringable;
 
 /**
  * @covers \Ibexa\Core\Base\Exceptions\UnauthorizedException
@@ -59,7 +60,7 @@ public static function getDataForTestConstructor(): iterable
             'The User does not have the \'read\' \'content\' permission with: contentId \'1\', locationId \'2\'',
         ];
 
-        $stringableClass = new class() implements \Stringable {
+        $stringableClass = new class() implements Stringable {
             public function __toString(): string
             {
                 return 'bar';