diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index f7292ea..741cc9d 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -4504,6 +4504,10 @@
   call feedkeys("Sabc, \<ESC>:let g:result=complete_match()\<CR>", 'tx')
   call assert_equal([[4, ',']], g:result)
 
+  set ise=\ ,=
+  call feedkeys("Sif true  \<ESC>:let g:result=complete_match()\<CR>", 'tx')
+  call assert_equal([[8, ' ']], g:result)
+
   bw!
   unlet g:result
   set isexpand&