diff --git a/src/testdir/test_arglist.vim b/src/testdir/test_arglist.vim
index 9513ad3..af90ddc 100644
--- a/src/testdir/test_arglist.vim
+++ b/src/testdir/test_arglist.vim
@@ -519,6 +519,20 @@
   call term_sendkeys(buf, ":quit\n")
   call WaitForAssert({-> assert_match('^E173:', term_getline(buf, 6))})
   call StopVimInTerminal(buf)
+
+  " Try :confirm quit with unedited files in arglist
+  let buf = RunVimInTerminal('', {'rows': 6})
+  call term_sendkeys(buf, ":set nomore\n")
+  call term_sendkeys(buf, ":args a b c\n")
+  call term_sendkeys(buf, ":confirm quit\n")
+  call WaitForAssert({-> assert_match('^\[Y\]es, (N)o: *$',
+        \ term_getline(buf, 6))})
+  call term_sendkeys(buf, "N")
+  call term_sendkeys(buf, ":confirm quit\n")
+  call WaitForAssert({-> assert_match('^\[Y\]es, (N)o: *$',
+        \ term_getline(buf, 6))})
+  call term_sendkeys(buf, "Y")
+  call StopVimInTerminal(buf)
 endfunc
 
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 3b07104..a16329b 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -2358,4 +2358,28 @@
   setglobal spellfile=
 endfunc
 
+" Test closing a window or editing another buffer from a FileChangedRO handler
+" in a readonly buffer
+func Test_FileChangedRO_winclose()
+  augroup FileChangedROTest
+    au!
+    autocmd FileChangedRO * quit
+  augroup END
+  new
+  set readonly
+  call assert_fails('normal i', 'E788:')
+  close
+  augroup! FileChangedROTest
+
+  augroup FileChangedROTest
+    au!
+    autocmd FileChangedRO * edit Xfile
+  augroup END
+  new
+  set readonly
+  call assert_fails('normal i', 'E788:')
+  close
+  augroup! FileChangedROTest
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_excmd.vim b/src/testdir/test_excmd.vim
index 2407f8e..472945d 100644
--- a/src/testdir/test_excmd.vim
+++ b/src/testdir/test_excmd.vim
@@ -238,6 +238,22 @@
   call assert_equal(['foo4'], readfile('foo'))
   call assert_equal(['bar2'], readfile('bar'))
 
+  " Test for closing a window with a modified buffer
+  let buf = RunVimInTerminal('', {'rows': 20})
+  call term_sendkeys(buf, ":set nomore\n")
+  call term_sendkeys(buf, ":new\n")
+  call term_sendkeys(buf, ":call setline(1, 'abc')\n")
+  call term_sendkeys(buf, ":confirm close\n")
+  call WaitForAssert({-> assert_match('^\[Y\]es, (N)o, (C)ancel: *$',
+        \ term_getline(buf, 20))}, 1000)
+  call term_sendkeys(buf, "C")
+  call term_sendkeys(buf, ":confirm close\n")
+  call WaitForAssert({-> assert_match('^\[Y\]es, (N)o, (C)ancel: *$',
+        \ term_getline(buf, 20))}, 1000)
+  call term_sendkeys(buf, "N")
+  call term_sendkeys(buf, ":quit\n")
+  call StopVimInTerminal(buf)
+
   call delete('foo')
   call delete('bar')
 endfunc
diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index d3f2e3a..276719c 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -4195,6 +4195,20 @@
   call assert_equal(0, getloclist(0, {'winid' : 0}).winid)
   new | only
 
+  " Using :split or :vsplit from a quickfix window should behave like a :new
+  " or a :vnew command
+  copen
+  split
+  call assert_equal(3, winnr('$'))
+  let l = getwininfo()
+  call assert_equal([0, 0, 1], [l[0].quickfix, l[1].quickfix, l[2].quickfix])
+  close
+  copen
+  vsplit
+  let l = getwininfo()
+  call assert_equal([0, 0, 1], [l[0].quickfix, l[1].quickfix, l[2].quickfix])
+  new | only
+
   call delete('Xtestfile1')
   call delete('Xtestfile2')
 endfunc
diff --git a/src/testdir/test_search.vim b/src/testdir/test_search.vim
index 9567aa4..afbea94 100644
--- a/src/testdir/test_search.vim
+++ b/src/testdir/test_search.vim
@@ -1515,4 +1515,31 @@
   call delete('Xresult')
 endfunc
 
+" Test for searching a pattern that is not present with 'nowrapscan'
+func Test_search_pat_not_found()
+  new
+  set nowrapscan
+  let @/ = '1abcxyz2'
+  call assert_fails('normal n', 'E385:')
+  call assert_fails('normal N', 'E384:')
+  set wrapscan&
+  close
+endfunc
+
+" Test for v:searchforward variable
+func Test_searchforward_var()
+  new
+  call setline(1, ['foo', '', 'foo'])
+  call cursor(2, 1)
+  let @/ = 'foo'
+  let v:searchforward = 0
+  normal N
+  call assert_equal(3, line('.'))
+  call cursor(2, 1)
+  let v:searchforward = 1
+  normal N
+  call assert_equal(1, line('.'))
+  close!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_swap.vim b/src/testdir/test_swap.vim
index aa67b43..7ce35cc 100644
--- a/src/testdir/test_swap.vim
+++ b/src/testdir/test_swap.vim
@@ -277,7 +277,6 @@
     autocmd SwapExists * let v:swapchoice = 'r'
   augroup END
 
-
   " Create a valid swapfile by editing a file with a special extension.
   split Xtest.scr
   call setline(1, ['one', 'two', 'three'])
@@ -309,3 +308,45 @@
   augroup END
   augroup! test_swap_recover_ext
 endfunc
+
+" Test for closing a split window automatically when a swap file is detected
+" and 'Q' is selected in the confirmation prompt.
+func Test_swap_split_win()
+  autocmd! SwapExists
+  augroup test_swap_splitwin
+    autocmd!
+    autocmd SwapExists * let v:swapchoice = 'q'
+  augroup END
+
+  " Create a valid swapfile by editing a file with a special extension.
+  split Xtest.scr
+  call setline(1, ['one', 'two', 'three'])
+  write  " file is written, not modified
+  write  " write again to make sure the swapfile is created
+  " read the swapfile as a Blob
+  let swapfile_name = swapname('%')
+  let swapfile_bytes = readfile(swapfile_name, 'B')
+
+  " Close and delete the file and recreate the swap file.
+  quit
+  call delete('Xtest.scr')
+  call writefile(swapfile_bytes, swapfile_name)
+  " Split edit the file again. This should fail to open the window
+  try
+    split Xtest.scr
+  catch
+    " E308 should be caught, not E306.
+    call assert_exception('E308:')  " Original file may have been changed
+  endtry
+  call assert_equal(1, winnr('$'))
+
+  call delete('Xtest.scr')
+  call delete(swapfile_name)
+
+  augroup test_swap_splitwin
+      autocmd!
+  augroup END
+  augroup! test_swap_splitwin
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 362b0eb..77e58d2 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -965,4 +965,12 @@
   call assert_fails('winpos 10', 'E466:')
 endfunc
 
+" Test for +cmd in a :split command
+func Test_split_cmd()
+  split +set\ readonly
+  call assert_equal(1, &readonly)
+  call assert_equal(2, winnr('$'))
+  close
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 6793547..41d021f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    275,
+/**/
     274,
 /**/
     273,