diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 9a2c3a3..e2b7fc2 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -1459,4 +1459,13 @@
   call assert_fails('call feedkeys("q:\<F1>\<CR>", "xt")', 'E11:')
 endfunc
 
+" Close the Cmd-line window in insert mode using CTRL-C
+func Test_cmdwin_insert_mode_close()
+  %bw!
+  let s = ''
+  exe "normal q:a\<C-C>let s='Hello'\<CR>"
+  call assert_equal('Hello', s)
+  call assert_equal(1, winnr('$'))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab