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diff --git a/testing/web-platform/tests/credential-management/fedcm-multi-idp/multiple-gets-after-onload.https.html b/testing/web-platform/tests/credential-management/fedcm-multi-idp/multiple-gets-after-onload.https.html
new file mode 100644
index 0000000000..1a806a2049
--- /dev/null
+++ b/testing/web-platform/tests/credential-management/fedcm-multi-idp/multiple-gets-after-onload.https.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<title>Federated Credential Management API multi IDP multiple gets after onload test.</title>
+<link rel="help" href="https://fedidcg.github.io/FedCM">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+
+<script type="module">
+import {set_fedcm_cookie, set_alt_fedcm_cookie, default_request_options, default_alt_request_options} from '../support/fedcm-helper.sub.js';
+
+let cookies_promise = Promise.all([set_fedcm_cookie(), set_alt_fedcm_cookie()]);
+const window_loaded = new Promise(resolve => {
+  window.addEventListener('load', () => {
+    resolve();
+  });
+});
+
+promise_test(async t => {
+  await Promise.all([cookies_promise, window_loaded]);
+  const first_cred = navigator.credentials.get(default_request_options());
+  const second_cred = navigator.credentials.get(default_alt_request_options());
+  // NetworkError is returned when another IDP is selected.
+  await promise_rejects_dom(t, 'NetworkError', second_cred);
+  const first = await first_cred;
+  assert_equals(first.token, "token");
+}, "No `get` calls before or during onload, multiple `get` calls after onload in the same task are allowed.");
+
+</script>