From 8861cf69e64f6debd80f7bb9bb89a599cd639375 Mon Sep 17 00:00:00 2001
From: Tontyna <35614937+Tontyna@users.noreply.github.com>
Date: Wed, 23 Oct 2019 01:29:35 +0200
Subject: [PATCH] Return appropriate tuple for string-set:none

---
 weasyprint/css/validation/properties.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/weasyprint/css/validation/properties.py b/weasyprint/css/validation/properties.py
index 499f595cf..09c40af5f 100644
--- a/weasyprint/css/validation/properties.py
+++ b/weasyprint/css/validation/properties.py
@@ -1369,7 +1369,7 @@ def string_set(tokens, base_url):
         if None not in parsed_tokens:
             return (var_name, parsed_tokens)
     elif tokens and get_keyword(tokens[0]) == 'none':
-        return 'none'
+        return 'none', ()
 
 
 @property()