diff --git a/tests/integration-test b/tests/integration-test
index ca9806b..54e4c4d 100755
--- a/tests/integration-test
+++ b/tests/integration-test
@@ -396,6 +396,7 @@ class Tests(dbusmock.DBusTestCase):
 
       upowerd.terminate()
       upowerd.wait()
+      upowerd.stdout.close()
 
     def test_dytc_performance_driver(self):
       '''Lenovo DYTC performance driver'''