diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 673bbcd356..19817c7353 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -1617,7 +1617,7 @@ class ReproducibleTestRunner(unittest.TextTestRunner):
     def __init__(
         self,
         stream: Optional[TextIO] = None,
-        resultclass: Type[unittest.TestResult] =
+        resultclass: Type[unittest.TextTestResult] =
         ReproducibleTestResult,
         **kwargs: Any
     ) -> None: