diff --git a/syntax_checkers/html/tidy.vim b/syntax_checkers/html/tidy.vim
index f073deaf..84c6a49c 100644
--- a/syntax_checkers/html/tidy.vim
+++ b/syntax_checkers/html/tidy.vim
@@ -35,6 +35,11 @@ let s:ignore_html_errors = [
\ " lacks \"content\" attribute",
\ "inserting \"type\" attribute",
\ "proprietary attribute \"data-",
+ \ "missing declaration",
+ \ "inserting implicit ",
+ \ "inserting missing 'title' element",
+ \ "attribute \"[+",
+ \ "unescaped & or unknown entity",
\ " attribute \"type\" has invalid value \"search\""
\]