diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 4585cd3..7af7d07 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -531,14 +531,15 @@
 endfunc
 
 func Test_access_freed_mem()
+  call assert_equal(&columns, winwidth(0))
   " This was accessing freed memory
   au * 0 vs xxx
   arg 0
   argadd
-  all
-  all
+  call assert_fails("all", "E249:")
   au!
   bwipe xxx
+  call assert_equal(&columns, winwidth(0))
 endfunc
 
 func Test_visual_cleared_after_window_split()