diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index c4ba10f..466b6ec 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -364,6 +364,37 @@
   call delete('Xtest_winscrolled')
 endfunc
 
+func Test_WinScrolled_mouse()
+  CheckRunVimInTerminal
+
+  let lines =<< trim END
+    set nowrap scrolloff=0
+    set mouse=a term=xterm ttymouse=sgr mousetime=200 clipboard=
+    call setline(1, ['foo']->repeat(32))
+    split
+    let g:scrolled = 0
+    au WinScrolled * let g:scrolled += 1
+  END
+  call writefile(lines, 'Xtest_winscrolled_mouse')
+  let buf = RunVimInTerminal('-S Xtest_winscrolled_mouse', {'rows': 10})
+
+  " With the upper split focused, send a scroll-down event to the unfocused one.
+  call test_setmouse(7, 1)
+  call term_sendkeys(buf, "\<ScrollWheelDown>")
+  call TermWait(buf)
+  call term_sendkeys(buf, ":echo g:scrolled\<CR>")
+  call WaitForAssert({-> assert_match('^1', term_getline(buf, 10))}, 1000)
+
+  " Again, but this time while we're in insert mode.
+  call term_sendkeys(buf, "i\<ScrollWheelDown>\<Esc>")
+  call TermWait(buf)
+  call term_sendkeys(buf, ":echo g:scrolled\<CR>")
+  call WaitForAssert({-> assert_match('^2', term_getline(buf, 10))}, 1000)
+
+  call StopVimInTerminal(buf)
+  call delete('Xtest_winscrolled_mouse')
+endfunc
+
 func Test_WinScrolled_close_curwin()
   CheckRunVimInTerminal
 
@@ -1572,7 +1603,7 @@
   " Close the other window, <afile> should be correct.
   exe win_id2win(winid) . 'q'
   call assert_equal('Xfoo', g:afile)
- 
+
   unlet g:afile
   bwipe Xfoo
   bwipe Xbar