diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index f16a46f..7d723a0 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -108,12 +108,16 @@
 	\ "call popup_create(['hello border', 'and more'], {'line': 2, 'col': 23, 'border': [], 'borderhighlight': ['TopColor', 'RightColor', 'BottomColor', 'LeftColor']})",
 	\ "call popup_create(['hello border', 'lines only'], {'line': 2, 'col': 43, 'border': [], 'borderhighlight': ['BlueColor'], 'borderchars': ['x']})",
 	\ "call popup_create(['hello border', 'with corners'], {'line': 2, 'col': 60, 'border': [], 'borderhighlight': ['BlueColor'], 'borderchars': ['x', '#']})",
-	\ "call popup_create(['hello border', 'with numbers'], {'line': 6, 'col': 3, 'border': [], 'borderhighlight': ['BlueColor'], 'borderchars': ['0', '1', '2', '3', '4', '5', '6', '7']})",
+	\ "let winid = popup_create(['hello border', 'with numbers'], {'line': 6, 'col': 3, 'border': [], 'borderhighlight': ['BlueColor'], 'borderchars': ['0', '1', '2', '3', '4', '5', '6', '7']})",
 	\ "call popup_create(['hello border', 'just blanks'], {'line': 7, 'col': 23, 'border': [], 'borderhighlight': ['BlueColor'], 'borderchars': [' ']})",
 	\], 'XtestPopupBorder')
   let buf = RunVimInTerminal('-S XtestPopupBorder', {'rows': 12})
   call VerifyScreenDump(buf, 'Test_popupwin_22', {})
 
+  " check that changing borderchars triggers a redraw
+  call term_sendkeys(buf, ":call popup_setoptions(winid, {'borderchars': ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']})\<CR>")
+  call VerifyScreenDump(buf, 'Test_popupwin_23', {})
+
   call StopVimInTerminal(buf)
   call delete('XtestPopupBorder')