diff --git a/test/issues/623/vimrc b/test/issues/623/vimrc
new file mode 100644
index 0000000..c1e254a
--- /dev/null
+++ b/test/issues/623/vimrc
@@ -0,0 +1,25 @@
+set nocompatible
+let &rtp  = '~/.vim/bundle/FastFold,' . &rtp
+let &rtp  = '~/.vim/bundle/vimtex,' . &rtp
+let &rtp .= ',~/.vim/bundle/vimtex/after'
+filetype plugin indent on
+syntax enable
+
+let g:vimtex_fold_enabled = 1
+" let g:vimtex_fold_commands_default = {}
+    " \ 'tikzset' : 'single',
+    " \}
+
+" Here we need to edit a large tex file, e.g. a thesis or long paper
+edit main.tex
+
+function! Test()
+  profile start profile.log
+  profile func *level
+  FastFoldUpdate!
+  profile pause
+  noautocmd qall!
+endfunction
+
+nnoremap <space>s :call Test()<cr>jk:w
+