diff --git a/t/stdin-batch.txtar b/t/stdin-batch.txtar
index 8ffffcb..d7391bb 100644
--- a/t/stdin-batch.txtar
+++ b/t/stdin-batch.txtar
@@ -1,4 +1,4 @@
 exec echo 1 2 3 4 5
 stdin stdout
-exec testrpn median
+[unix] exec testrpn median
 [unix] stdout '3\n'