diff --git a/Base/res/html/misc/not-selector.html b/Base/res/html/misc/not-selector.html
index 21200ccf48..10ed3f7e92 100644
--- a/Base/res/html/misc/not-selector.html
+++ b/Base/res/html/misc/not-selector.html
@@ -1,6 +1,7 @@
-<html>
+<!doctype html>
+<html lang="en">
 <head>
-<title>:only-child test</title>
+<title>:not() test</title>
 <style>
 div {
     background: yellow;
