1 files changed, 3 insertions, 0 deletions
diff --git a/testing/web-platform/tests/attribution-reporting/resources/helpers.js b/testing/web-platform/tests/attribution-reporting/resources/helpers.js
index 5778159d4c..e5c749931e 100644
--- a/testing/web-platform/tests/attribution-reporting/resources/helpers.js
+++ b/testing/web-platform/tests/attribution-reporting/resources/helpers.js
@@ -170,6 +170,7 @@ const registerAttributionSrc = async ({
   method = 'img',
   extraQueryParams = {},
   reportingOrigin,
+  extraHeaders = [],
 }) => {
   const searchParams = new URLSearchParams(location.search);
 
@@ -208,6 +209,8 @@ const registerAttributionSrc = async ({
     headers = headers.concat(params.headers);
   }
 
+  headers = headers.concat(extraHeaders);
+
   const url = blankURLWithHeaders(headers, reportingOrigin);
 
   Object.entries(extraQueryParams)