diff --git a/tests/Server/QueryExecutionTest.php b/tests/Server/QueryExecutionTest.php
index 5a76f46..d816bce 100644
--- a/tests/Server/QueryExecutionTest.php
+++ b/tests/Server/QueryExecutionTest.php
@@ -19,7 +19,6 @@ use GraphQL\Validator\Rules\CustomValidationRule;
 use GraphQL\Validator\ValidationContext;
 use function count;
 use function sprintf;
-use Unsafe;
 
 class QueryExecutionTest extends ServerTestCase
 {
diff --git a/tests/Server/ServerTestCase.php b/tests/Server/ServerTestCase.php
index 90f6849..431d28d 100644
--- a/tests/Server/ServerTestCase.php
+++ b/tests/Server/ServerTestCase.php
@@ -14,7 +14,6 @@ use function trigger_error;
 use const E_USER_DEPRECATED;
 use const E_USER_NOTICE;
 use const E_USER_WARNING;
-use Unsafe;
 
 abstract class ServerTestCase extends TestCase
 {
diff --git a/tests/Server/Unsafe.php b/tests/Server/Unsafe.php
index d33a908..5e08918 100644
--- a/tests/Server/Unsafe.php
+++ b/tests/Server/Unsafe.php
@@ -1,5 +1,7 @@
 <?php
 
+namespace GraphQL\Tests\Server;
+
 use GraphQL\Error\ClientAware;
 
 class Unsafe extends \Exception implements ClientAware