diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index 57115de..ea217d9 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -1464,4 +1464,50 @@
   set diffopt&vim
 endfunc
 
+" Test for using the 'zi' command to invert 'foldenable' in diff windows (test
+" for the issue fixed by patch 6.2.317)
+func Test_diff_foldinvert()
+  %bw!
+  edit Xfile1
+  new Xfile2
+  new Xfile3
+  windo diffthis
+  " open a non-diff window
+  botright new
+  1wincmd w
+  call assert_true(getwinvar(1, '&foldenable'))
+  call assert_true(getwinvar(2, '&foldenable'))
+  call assert_true(getwinvar(3, '&foldenable'))
+  normal zi
+  call assert_false(getwinvar(1, '&foldenable'))
+  call assert_false(getwinvar(2, '&foldenable'))
+  call assert_false(getwinvar(3, '&foldenable'))
+  normal zi
+  call assert_true(getwinvar(1, '&foldenable'))
+  call assert_true(getwinvar(2, '&foldenable'))
+  call assert_true(getwinvar(3, '&foldenable'))
+
+  " If the current window has 'noscrollbind', then 'zi' should not change
+  " 'foldenable' in other windows.
+  1wincmd w
+  set noscrollbind
+  normal zi
+  call assert_false(getwinvar(1, '&foldenable'))
+  call assert_true(getwinvar(2, '&foldenable'))
+  call assert_true(getwinvar(3, '&foldenable'))
+
+  " 'zi' should not change the 'foldenable' for windows with 'noscrollbind'
+  1wincmd w
+  set scrollbind
+  normal zi
+  call setwinvar(2, '&scrollbind', v:false)
+  normal zi
+  call assert_false(getwinvar(1, '&foldenable'))
+  call assert_true(getwinvar(2, '&foldenable'))
+  call assert_false(getwinvar(3, '&foldenable'))
+
+  %bw!
+  set scrollbind&
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_gui.vim b/src/testdir/test_gui.vim
index 9055284..aeacb31 100644
--- a/src/testdir/test_gui.vim
+++ b/src/testdir/test_gui.vim
@@ -1266,4 +1266,57 @@
   cunmap <buffer> <F4>
 endfunc
 
+" Test for generating a GUI tabline event to select a tab page
+func Test_gui_tabline_event()
+  %bw!
+  edit Xfile1
+  tabedit Xfile2
+  tabedit Xfile3
+
+  tabfirst
+  call assert_equal(v:true, test_gui_tabline_event(2))
+  call feedkeys("y", "Lx!")
+  call assert_equal(2, tabpagenr())
+  call assert_equal(v:true, test_gui_tabline_event(3))
+  call feedkeys("y", "Lx!")
+  call assert_equal(3, tabpagenr())
+  call assert_equal(v:false, test_gui_tabline_event(3))
+
+  " From the cmdline window, tabline event should not be handled
+  call feedkeys("q::let t = test_gui_tabline_event(2)\<CR>:q\<CR>", 'x!')
+  call assert_equal(v:false, t)
+
+  %bw!
+endfunc
+
+" Test for generating a GUI tabline menu event to execute an action
+func Test_gui_tabmenu_event()
+  %bw!
+
+  " Try to close the last tab page
+  call test_gui_tabmenu_event(1, 1)
+  call feedkeys("y", "Lx!")
+
+  edit Xfile1
+  tabedit Xfile2
+  call test_gui_tabmenu_event(1, 1)
+  call feedkeys("y", "Lx!")
+  call assert_equal(1, tabpagenr('$'))
+  call assert_equal('Xfile2', bufname())
+
+  call test_gui_tabmenu_event(1, 2)
+  call feedkeys("y", "Lx!")
+  call assert_equal(2, tabpagenr('$'))
+
+  " If tabnr is 0, then the current tabpage should be used.
+  call test_gui_tabmenu_event(0, 2)
+  call feedkeys("y", "Lx!")
+  call assert_equal(3, tabpagenr('$'))
+  call test_gui_tabmenu_event(0, 1)
+  call feedkeys("y", "Lx!")
+  call assert_equal(2, tabpagenr('$'))
+
+  %bw!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
index 4a09964..9fcc9fd 100644
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -891,6 +891,7 @@
 func Test_normal_z_error()
   call assert_beeps('normal! z2p')
   call assert_beeps('normal! zq')
+  call assert_beeps('normal! cz1')
 endfunc
 
 func Test_normal15_z_scroll_vert()
@@ -930,7 +931,7 @@
   call assert_equal(10, winheight(0))
   exe "norm! z12\<cr>"
   call assert_equal(12, winheight(0))
-  exe "norm! z10\<cr>"
+  exe "norm! z15\<Del>0\<cr>"
   call assert_equal(10, winheight(0))
 
   " Test for z.