diff --git a/tests/Unit/EnumTypeTest.php b/tests/Unit/EnumTypeTest.php
index <HASH>..<HASH> 100644
--- a/tests/Unit/EnumTypeTest.php
+++ b/tests/Unit/EnumTypeTest.php
@@ -16,6 +16,7 @@ class EnumTypeTest extends TestCase
     public function testToType(): void
     {
         $type = new ExampleEnumType();
+        /** @var EnumType $objectType */
         $objectType = $type->toType();
 
         $this->assertInstanceOf(EnumType::class, $objectType);
tests: add typehint for EnumType

Reported by phpstan:
Call to an undefined method GraphQL\Type\Definition\Type::getValues()