diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index 081d4ab..3ec6ea8 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -226,5 +226,17 @@
   call prop_type_delete('comment')
 endfunc
 
+func Test_prop_byteoff()
+  call prop_type_add('comment', {'highlight': 'Directory'})
+  new
+  call setline(1, ['line1', 'line2', ''])
+  call assert_equal(13, line2byte(3))
+  call prop_add(1, 1, {'end_col': 3, 'type': 'comment'})
+  call assert_equal(13, line2byte(3))
+
+  bwipe!
+  call prop_type_delete('comment')
+endfunc
+
 
 " TODO: screenshot test with highlighting