diff --git a/test/old/testdir/test_startup.vim b/test/old/testdir/test_startup.vim
index c46b4002c2..ed4c4526f7 100644
--- a/test/old/testdir/test_startup.vim
+++ b/test/old/testdir/test_startup.vim
@@ -1293,6 +1293,8 @@ func Test_echo_true_in_cmd()
 endfunc
 
 func Test_rename_buffer_on_startup()
+  CheckUnix
+
   let lines =<< trim END
       call writefile(['done'], 'Xresult')
       qa!