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diff --git a/testing/web-platform/tests/referrer-policy/css-integration/child-css/external-import-stylesheet.html b/testing/web-platform/tests/referrer-policy/css-integration/child-css/external-import-stylesheet.html
new file mode 100644
index 0000000000..a4bbddb564
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+++ b/testing/web-platform/tests/referrer-policy/css-integration/child-css/external-import-stylesheet.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>CSS integration - Child css from external stylesheet</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/common/utils.js"></script>
+    <!-- Common global functions for referrer-policy tests. -->
+    <script src="/common/security-features/resources/common.sub.js"></script>
+    <meta name="referrer" content="origin">
+  </head>
+  <body>
+    <p>Check that child css are loaded with the referrer and referrer policy
+    from the external stylesheet.</p>
+
+    <div class="styled"></div>
+
+    <script>
+      promise_test(function(css_test) {
+        let id = token();
+        let url_prefix = location.protocol + "//www1." + location.hostname + ":" + location.port;
+        let css_url = url_prefix +
+          "/common/security-features/subresource/stylesheet.py?id=" + id +
+          "&import-rule" + "&referrer-policy=no-referrer";
+        let check_url = url_prefix + "/common/security-features/subresource/stylesheet.py" +
+                        "?id=" + id + "&report-headers";
+
+        return new Promise(resolve => {
+            let link = document.createElement("link");
+            link.href = css_url;
+            link.rel = "stylesheet";
+            link.onload = resolve;
+            document.head.appendChild(link);
+          })
+          .then(() => timeoutPromise(css_test, 1000))
+          .then(() => requestViaXhr(check_url))
+          .then(function(message) {
+              assert_own_property(message, "headers");
+              assert_equals(message.referrer, undefined);
+            });
+      }, "Child css from external stylesheet.");
+    </script>
+
+    <div id="log"></div>
+  </body>
+</html>