diff --git a/tests/qemu-iotests/testrunner.py b/tests/qemu-iotests/testrunner.py
index a56b6da396..0e29c2fddd 100644
--- a/tests/qemu-iotests/testrunner.py
+++ b/tests/qemu-iotests/testrunner.py
@@ -341,6 +341,7 @@ class TestRunner(ContextManager['TestRunner']):
             elif res.status == 'not run':
                 notrun.append(name)
 
+            sys.stdout.flush()
             if res.interrupted:
                 break