diff --git a/src/testdir/test_modeline.vim b/src/testdir/test_modeline.vim
index c33a080..c3c624d 100644
--- a/src/testdir/test_modeline.vim
+++ b/src/testdir/test_modeline.vim
@@ -119,6 +119,7 @@
   call s:modeline_fails('makespellmem', 'makespellmem=Something()', 'E520:')
   call s:modeline_fails('mzschemedll', 'mzschemedll=Something()', 'E520:')
   call s:modeline_fails('mzschemegcdll', 'mzschemegcdll=Something()', 'E520:')
+  call s:modeline_fails('modelineexpr', 'modelineexpr', 'E520:')
   call s:modeline_fails('omnifunc', 'omnifunc=Something()', 'E520:')
   call s:modeline_fails('operatorfunc', 'operatorfunc=Something()', 'E520:')
   call s:modeline_fails('perldll', 'perldll=Something()', 'E520:')