diff --git a/tests/testmplex.nim b/tests/testmplex.nim
index f01c0a5..aa2773c 100644
--- a/tests/testmplex.nim
+++ b/tests/testmplex.nim
@@ -388,6 +388,7 @@ suite "Mplex":
           count.inc
           await stream.close()
           count.inc
+          await stream.close()
           if count == 10:
             done.complete()