diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index eab7aaa..a48aa91 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -559,14 +559,23 @@
     return
   endif
   call writefile([
-	\ "call setline(1, ['One two', 'Numbér 123 änd thœn 4¾7.', '--aa--bb--cc--dd--'])",
+	\ "call setline(1, ["
+	\	.. "'One two',"
+	\	.. "'Numbér 123 änd thœn 4¾7.',"
+	\	.. "'--aa--bb--cc--dd--',"
+	\	.. "'// comment with error in it',"
+	\	.. "])",
 	\ "hi NumberProp ctermfg=blue",
 	\ "hi LongProp ctermbg=yellow",
+	\ "hi BackgroundProp ctermbg=lightgrey",
+	\ "hi UnderlineProp cterm=underline",
 	\ "call prop_type_add('number', {'highlight': 'NumberProp'})",
 	\ "call prop_type_add('long', {'highlight': 'LongProp'})",
 	\ "call prop_type_add('start', {'highlight': 'NumberProp', 'start_incl': 1})",
 	\ "call prop_type_add('end', {'highlight': 'NumberProp', 'end_incl': 1})",
 	\ "call prop_type_add('both', {'highlight': 'NumberProp', 'start_incl': 1, 'end_incl': 1})",
+	\ "call prop_type_add('background', {'highlight': 'BackgroundProp', 'combine': 1})",
+	\ "call prop_type_add('error', {'highlight': 'UnderlineProp', 'combine': 1})",
 	\ "call prop_add(1, 4, {'end_lnum': 3, 'end_col': 3, 'type': 'long'})",
 	\ "call prop_add(2, 9, {'length': 3, 'type': 'number'})",
 	\ "call prop_add(2, 24, {'length': 4, 'type': 'number'})",
@@ -574,13 +583,17 @@
 	\ "call prop_add(3, 7, {'length': 2, 'type': 'start'})",
 	\ "call prop_add(3, 11, {'length': 2, 'type': 'end'})",
 	\ "call prop_add(3, 15, {'length': 2, 'type': 'both'})",
+	\ "call prop_add(4, 12, {'length': 10, 'type': 'background'})",
+	\ "call prop_add(4, 17, {'length': 5, 'type': 'error'})",
 	\ "set number",
 	\ "hi clear SpellBad",
 	\ "set spell",
+	\ "syn match Comment '//.*'",
+	\ "hi Comment ctermfg=green",
 	\ "normal 3G0llix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>lllix\<Esc>",
 	\ "normal 3G0lli\<BS>\<Esc>",
 	\], 'XtestProp')
-  let buf = RunVimInTerminal('-S XtestProp', {'rows': 6})
+  let buf = RunVimInTerminal('-S XtestProp', {'rows': 7})
   call VerifyScreenDump(buf, 'Test_textprop_01', {})
 
   " clean up