diff --git a/xorb/css-with-json-parser-breaker.sub.html b/xorb/css-with-json-parser-breaker.sub.html
new file mode 100644
index 00000000000000..75cdb0fb86322d
--- /dev/null
+++ b/xorb/css-with-json-parser-breaker.sub.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>XORB should not block text/css with a JSON parser breaker</title>
+<link rel="stylesheet" type="text/css"
+      href="http://{{domains[www1]}}:{{ports[http][0]}}/xorb/resources/css-with-json-parser-breaker.css">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<body>
+  <h1 id="header">Header example</h1>
+  <p>Paragraph body</p>
+</body>
+<script>
+test(function() {
+  var style = getComputedStyle(document.getElementById('header'));
+  assert_equals(style.getPropertyValue('color'), 'rgb(255, 0, 0)');
+}, "XORB should not block text/css with a JSON parser breaker");
+</script>
diff --git a/xorb/resources/css-with-json-parser-breaker.css b/xorb/resources/css-with-json-parser-breaker.css
new file mode 100644
index 00000000000000..3ba33659844c17
--- /dev/null
+++ b/xorb/resources/css-with-json-parser-breaker.css
@@ -0,0 +1,3 @@
+)]}'
+{}
+h1 { color: red; }
