diff --git a/src/testdir/test_quickfix.vim b/src/testdir/test_quickfix.vim
index 71aa7d5..070582df 100644
--- a/src/testdir/test_quickfix.vim
+++ b/src/testdir/test_quickfix.vim
@@ -3111,3 +3111,44 @@
   call assert_equal(3, winnr())
   close
 endfunc
+
+" Tests for quickfix/location lists changed by autocommands when
+" :vimgrep/:lvimgrep commands are running.
+func Test_vimgrep_autocmd()
+  call setqflist([], 'f')
+  call writefile(['stars'], 'Xtest1.txt')
+  call writefile(['stars'], 'Xtest2.txt')
+
+  " Test 1:
+  " When searching for a pattern using :vimgrep, if the quickfix list is
+  " changed by an autocmd, the results should be added to the correct quickfix
+  " list.
+  autocmd BufRead Xtest2.txt cexpr '' | cexpr ''
+  silent vimgrep stars Xtest*.txt
+  call assert_equal(1, getqflist({'nr' : 0}).nr)
+  call assert_equal(3, getqflist({'nr' : '$'}).nr)
+  call assert_equal('Xtest2.txt', bufname(getqflist()[1].bufnr))
+  au! BufRead Xtest2.txt
+
+  " Test 2:
+  " When searching for a pattern using :vimgrep, if the quickfix list is
+  " freed, then a error should be given.
+  silent! %bwipe!
+  call setqflist([], 'f')
+  autocmd BufRead Xtest2.txt for i in range(10) | cexpr '' | endfor
+  call assert_fails('vimgrep stars Xtest*.txt', 'E925:')
+  au! BufRead Xtest2.txt
+
+  " Test 3:
+  " When searching for a pattern using :lvimgrep, if the location list is
+  " freed, then the command should error out.
+  silent! %bwipe!
+  let g:save_winid = win_getid()
+  autocmd BufRead Xtest2.txt call setloclist(g:save_winid, [], 'f')
+  call assert_fails('lvimgrep stars Xtest*.txt', 'E926:')
+  au! BufRead Xtest2.txt
+
+  call delete('Xtest1.txt')
+  call delete('Xtest2.txt')
+  call setqflist([], 'f')
+endfunc