diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 6897040..03778f8 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -2375,6 +2375,13 @@
   call bufload(buf)
   call assert_equal([''], getbufline(buf, 1, '$'))
 
+  " when 'buftype' is "acwrite" then bufload() DOES read the file
+  bwipe! XotherName
+  let buf = bufadd('XotherName')
+  call setbufvar(buf, '&bt', 'acwrite')
+  call bufload(buf)
+  call assert_equal(['some', 'text'], getbufline(buf, 1, '$'))
+
   bwipe someName
   bwipe XotherName
   call assert_equal(0, bufexists('someName'))