diff --git a/test/functional/tests/conftest.py b/test/functional/tests/conftest.py
index 3390636..7c66a8c 100644
--- a/test/functional/tests/conftest.py
+++ b/test/functional/tests/conftest.py
@@ -93,6 +93,7 @@ def pytest_runtest_teardown():
                 if TestRun.executor.is_active():
                     TestRun.executor.wait_for_connection()
                 Udev.enable()
+                kill_all_io()
                 unmount_cas_devices()
                 casadm.remove_all_detached_cores()
                 casadm.stop_all_caches()