diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index 2714fa1..d67dd55 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -74,6 +74,10 @@
   delete('Xdir', 'rf')
 enddef
 
+def Test_comment_error()
+  v9.CheckDefFailure(['#{ comment'], 'E1170:')
+enddef
+
 def Test_compile_error_in_called_function()
   var lines =<< trim END
       vim9script