diff --git a/tests/PHPStanTests/TypeInferenceTest.php b/tests/PHPStanTests/TypeInferenceTest.php
index ed5be84..504c9b3 100644
--- a/tests/PHPStanTests/TypeInferenceTest.php
+++ b/tests/PHPStanTests/TypeInferenceTest.php
@@ -16,7 +16,7 @@
 class TypeInferenceTest extends TypeInferenceTestCase
 {
     /**
-     * @return mixed
+     * @return iterable<mixed>
      */
     public function dataFileAsserts(): iterable
     {