diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index e22f6b2..3b7a4ec 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -786,6 +786,23 @@
   augroup! QfBufWinEnter
 endfunc
 
+func Test_bufwinenter_once()
+  augroup QfBufWinEnter
+    au!
+    au BufWinEnter * let g:got_afile ..= 'got ' .. expand('<afile>')
+  augroup END
+  let g:got_afile = ''
+  copen
+  call assert_equal('got quickfix', g:got_afile)
+
+  cclose
+  unlet g:got_afile
+  augroup QfBufWinEnter
+    au!
+  augroup END
+  augroup! QfBufWinEnter
+endfunc
+
 func XqfTitleTests(cchar)
   call s:setup_commands(a:cchar)