diff --git a/fetch/sec-metadata/appcache.tentative.https.sub.html b/fetch/sec-metadata/appcache.tentative.https.sub.html
new file mode 100644
index 000000000000000..a2dc8e5dfd5aa5d
--- /dev/null
+++ b/fetch/sec-metadata/appcache.tentative.https.sub.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html manifest="/fetch/sec-metadata/resources/record-header.py?file=appcache-manifest">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=/fetch/sec-metadata/resources/helper.js></script>
+<script src=/common/utils.js></script>
+<body></body>
+<script>
+  async_test(t => {
+    window.applicationCache.oncached = window.applicationCache.onnoupdate = window.applicationCache.onerror = t.step_func(e => {
+        fetch("/fetch/sec-metadata/resources/record-header.py?retrieve=true&file=appcache-manifest")
+          .then(t.step_func(response => response.text()))
+          .then(t.step_func_done(text => assert_header_equals(text, {
+            "dest": "",
+            "site": "same-origin",
+            "user": "",
+            "mode": "no-cors"
+          })))
+          .catch(t.unreached_func("Fetching and verifying the results should succeed."));
+    });
+  }, "Appcache!");
+</script>
