diff --git a/autoload/medieval.vim b/autoload/medieval.vim
index eee3adc..91e99b9 100644
--- a/autoload/medieval.vim
+++ b/autoload/medieval.vim
@@ -1,3 +1,4 @@
+let s:tempfile = fnamemodify(tempname(), ':h') . '/medieval'
 let s:fences = [{'start': '[`~]\{3,}'}, {'start': '\$\$'}]
 let s:opts = ['name', 'target', 'require', 'tangle']
 let s:optspat = '\(' . join(s:opts, '\|') . '\):\s*\([0-9A-Za-z_+.$#&/-]\+\)'
@@ -196,18 +197,9 @@ function! s:callback(context, output) abort
             call append(tstart + 1, a:output)
         endif
     else
-        " Open result in scratch buffer
-        if &splitbelow
-            botright new
-        else
-            topleft new
-        endif
-
-        call append(0, a:output)
-        call deletebufline('%', '$')
-        exec 'resize' &previewheight
-        setlocal buftype=nofile bufhidden=delete nobuflisted noswapfile winfixheight
-        wincmd p
+        " Open result in preview window
+        call writefile(a:output, s:tempfile)
+        exec 'pedit ' . s:tempfile
     endif
 endfunction