diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index 749b8e8..bdced02 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -1032,7 +1032,7 @@
       call Change()
       unlet g:Aconst
   END
-  CheckScriptFailure(lines, 'E1122: Variable is locked: Aconst', 2)
+  CheckScriptFailure(lines, 'E741: Value is locked: Aconst', 2)
 enddef
 
 " Test that inside :function a Python function can be defined, :def is not