diff --git a/test/old/testdir/test_usercommands.vim b/test/old/testdir/test_usercommands.vim
index d3f87ea924..9370cd021c 100644
--- a/test/old/testdir/test_usercommands.vim
+++ b/test/old/testdir/test_usercommands.vim
@@ -2,6 +2,7 @@
 
 source check.vim
 source screendump.vim
+source vim9.vim
 
 " Test for <mods> in user defined commands
 function Test_cmdmods()
@@ -307,13 +308,26 @@ func Test_CmdErrors()
   call assert_fails('com! -complete=custom DoCmd :', 'E467:')
   call assert_fails('com! -complete=customlist DoCmd :', 'E467:')
   " call assert_fails('com! -complete=behave,CustomComplete DoCmd :', 'E468:')
-  call assert_fails('com! -complete=file DoCmd :', 'E1208:')
-  call assert_fails('com! -nargs=0 -complete=file DoCmd :', 'E1208:')
   call assert_fails('com! -nargs=x DoCmd :', 'E176:')
   call assert_fails('com! -count=1 -count=2 DoCmd :', 'E177:')
   call assert_fails('com! -count=x DoCmd :', 'E178:')
   call assert_fails('com! -range=x DoCmd :', 'E178:')
 
+  call assert_fails('com! -complete=file DoCmd :', 'E1208:')
+  call assert_fails('com! -nargs=0 -complete=file DoCmd :', 'E1208:')
+
+  let lines =<< trim END
+      vim9script
+      com! -complete=file DoCmd :
+  END
+  call CheckScriptFailure(lines, 'E1208', 2)
+
+  let lines =<< trim END
+      vim9script
+      com! -nargs=0 -complete=file DoCmd :
+  END
+  call CheckScriptFailure(lines, 'E1208', 2)
+
   com! -nargs=0 DoCmd :
   call assert_fails('DoCmd x', 'E488:')