diff --git a/tests/qunit/index.html b/tests/qunit/index.html
index 269e7eb60e..fb323eaabf 100644
--- a/tests/qunit/index.html
+++ b/tests/qunit/index.html
@@ -2,6 +2,7 @@
 <html>
 	<head>
 		<title>WordPress QUnit Test Suite</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 
 		<!-- Dependencies -->
 		<script src="../../build/wp-includes/js/jquery/jquery.js"></script>
