diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 4bac4f9..353bd54 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -311,9 +311,9 @@
   call writefile(range(50), 'Xtext')
   call writefile([
 	\ 'terminal',
-	\ 'sleep 100m',
+	\ 'sleep 400m',
 	\ 'call feedkeys("tail -n 100 -f Xtext\<CR>", "xt")',
-	\ 'sleep 100m',
+	\ 'sleep 200m',
 	\ 'call feedkeys("\<C-W>N", "xt")',
 	\ ], 'XTest_postponed')
   let buf = RunVimInTerminal('-S XTest_postponed', {})