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-rw-r--r--tests/static/accordion.html2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/static/accordion.html b/tests/static/accordion.html
index 39b35946b..222bbcff0 100644
--- a/tests/static/accordion.html
+++ b/tests/static/accordion.html
@@ -1,4 +1,4 @@
-<!doctype html>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>jQuery UI Accordion Static Markup Test Page</title>