diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index b5e316c..94cb827 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -1503,6 +1503,27 @@
   call assert_fails('call feedkeys("q:Q\<CR>", "xt")', 'E11:')
   call assert_fails('call feedkeys("q:Z\<CR>", "xt")', 'E11:')
   call assert_fails('call feedkeys("q:\<F1>\<CR>", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>s", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>v", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>^", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>n", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>z", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>o", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>w", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>j", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>k", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>h", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>l", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>T", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>x", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>r", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>R", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>K", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>}", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>]", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>f", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>d", "xt")', 'E11:')
+  call assert_fails('call feedkeys("q:\<C-W>g", "xt")', 'E11:')
 endfunc
 
 " Close the Cmd-line window in insert mode using CTRL-C