diff --git a/testing/web-platform/meta/loading/lazyload/original-base-url-applied-tentative.html.ini b/testing/web-platform/meta/loading/lazyload/original-base-url-applied-tentative.html.ini
new file mode 100644
index 000000000000..268c948598bb
--- /dev/null
+++ b/testing/web-platform/meta/loading/lazyload/original-base-url-applied-tentative.html.ini
@@ -0,0 +1,4 @@
+[original-base-url-applied-tentative.html]
+  [Test that when deferred iframe is loaded, it uses the base URL computed at parse time.]
+    expected: FAIL
+