1 files changed, 5 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fetch/api/basic/mediasource.window.js b/testing/web-platform/tests/fetch/api/basic/mediasource.window.js
new file mode 100644
index 0000000000..1f89595393
--- /dev/null
+++ b/testing/web-platform/tests/fetch/api/basic/mediasource.window.js
@@ -0,0 +1,5 @@
+promise_test(t => {
+  const mediaSource = new MediaSource(),
+        mediaSourceURL = URL.createObjectURL(mediaSource);
+  return promise_rejects_js(t, TypeError, fetch(mediaSourceURL));
+}, "Cannot fetch blob: URL from a MediaSource");