diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index f97c432..5028a85 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -540,7 +540,7 @@
   split messages
   call append(line('$'), '')
   call append(line('$'), 'From ' . g:testname . ':')
-  call append(line('$'), s:messages->map({_, val -> substitute(val, '\%x1b\[\d\?m', '', 'g')}))
+  call append(line('$'), s:messages->map({_, val -> substitute(val, '\%x1b[[|]\(\d\?\|\d\+\)[hm]', '', 'g')}))
   write
 
   qall!