diff --git a/unix/syscall_openbsd_test.go b/unix/syscall_openbsd_test.go
index b95f334..dabe4d5 100644
--- a/unix/syscall_openbsd_test.go
+++ b/unix/syscall_openbsd_test.go
@@ -12,6 +12,7 @@
 )
 
 func TestPpoll(t *testing.T) {
+	defer chtmpdir(t)()
 	f, cleanup := mktmpfifo(t)
 	defer cleanup()