diff --git a/src/testdir/test_usercommands.vim b/src/testdir/test_usercommands.vim
index fe08b95..deea5df 100644
--- a/src/testdir/test_usercommands.vim
+++ b/src/testdir/test_usercommands.vim
@@ -326,13 +326,13 @@
       vim9script
       com! -complete=file DoCmd :
   END
-  call v9.CheckScriptFailure(lines, 'E1208', 2)
+  call v9.CheckScriptFailure(lines, 'E1208:', 2)
 
   let lines =<< trim END
       vim9script
       com! -nargs=0 -complete=file DoCmd :
   END
-  call v9.CheckScriptFailure(lines, 'E1208', 2)
+  call v9.CheckScriptFailure(lines, 'E1208:', 2)
 
   com! -nargs=0 DoCmd :
   call assert_fails('DoCmd x', 'E488:')