2 files changed, 20 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/pref/fetch_nonexistent_file.html b/dom/serviceworkers/test/pref/fetch_nonexistent_file.html
new file mode 100644
index 0000000000..84c3a1398d
--- /dev/null
+++ b/dom/serviceworkers/test/pref/fetch_nonexistent_file.html
@@ -0,0 +1,15 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<script>
+
+  async function fetch_status() {
+    let response = await fetch('this_file_does_not_exist.txt');
+    return response.status;
+  }
+
+</script>
+</head>
+<body>
+</body>
+</html>
diff --git a/dom/serviceworkers/test/pref/intercept_nonexistent_file_sw.js b/dom/serviceworkers/test/pref/intercept_nonexistent_file_sw.js
new file mode 100644
index 0000000000..ab0f1d572d
--- /dev/null
+++ b/dom/serviceworkers/test/pref/intercept_nonexistent_file_sw.js
@@ -0,0 +1,5 @@
+onfetch = function (e) {
+  if (e.request.url.match(/this_file_does_not_exist.txt$/)) {
+    e.respondWith(new Response("intercepted"));
+  }
+};