1 files changed, 2 insertions, 0 deletions
diff --git a/testing/web-platform/tests/credential-management/support/fedcm/token_with_rp_mode.py b/testing/web-platform/tests/credential-management/support/fedcm/token_with_rp_mode.py
index 515736416f..add634c99b 100644
--- a/testing/web-platform/tests/credential-management/support/fedcm/token_with_rp_mode.py
+++ b/testing/web-platform/tests/credential-management/support/fedcm/token_with_rp_mode.py
@@ -7,6 +7,8 @@ def main(request, response):
     return request_error
 
   response.headers.set(b"Content-Type", b"application/json")
+  response.headers.set(b"Access-Control-Allow-Origin", request.headers.get(b"Origin"))
+  response.headers.set(b"Access-Control-Allow-Credentials", "true")
 
   rp_mode = request.POST.get(b"mode")
   return "{\"token\": \"mode=" + rp_mode.decode("utf-8") + "\"}"