diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 25ec2b5..698da04 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -559,7 +559,7 @@
 
 func Test_terminal_noblock()
   let buf = term_start(&shell)
-  if has('mac')
+  if has('bsd') || has('mac') || has('sun')
     " The shell or something else has a problem dealing with more than 1000
     " characters at the same time.
     let len = 1000