diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
index 418dafa..e1dbc87 100644
--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -1084,6 +1084,8 @@
 
   call feedkeys(":MyCmd whoam\<C-A>\<C-B>\"\<CR>", 'tx')
   call assert_match('^".*\<whoami\>', @:)
+  let l = getcompletion('whoam', 'shellcmdline')
+  call assert_match('\<whoami\>', join(l, ' '))
 
   delcommand MyCmd
 endfunc
@@ -3649,9 +3651,13 @@
 
   call feedkeys(":MyCmd vim test_cmdline.\<Tab>\<C-B>\"\<CR>", 'xt')
   call assert_equal('"MyCmd vim test_cmdline.vim', @:)
+  call assert_equal(['test_cmdline.vim'],
+        \ getcompletion('vim test_cmdline.', 'shellcmdline'))
 
   call feedkeys(":MyCmd vim nonexistentfile\<Tab>\<C-B>\"\<CR>", 'xt')
   call assert_equal('"MyCmd vim nonexistentfile', @:)
+  call assert_equal([],
+        \ getcompletion('vim nonexistentfile', 'shellcmdline'))
 
   let compl1 = getcompletion('', 'file')[0]
   let compl2 = getcompletion('', 'file')[1]
@@ -3668,9 +3674,13 @@
   set wildoptions&
   call feedkeys(":MyCmd vim test_cmdline.\<Tab>\<C-B>\"\<CR>", 'xt')
   call assert_equal('"MyCmd vim test_cmdline.vim', @:)
+  call assert_equal(['test_cmdline.vim'],
+        \ getcompletion('vim test_cmdline.', 'shellcmdline'))
 
   call feedkeys(":MyCmd vim nonexistentfile\<Tab>\<C-B>\"\<CR>", 'xt')
   call assert_equal('"MyCmd vim nonexistentfile', @:)
+  call assert_equal([],
+        \ getcompletion('vim nonexistentfile', 'shellcmdline'))
 
   let compl1 = getcompletion('', 'file')[0]
   let compl2 = getcompletion('', 'file')[1]