--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -592342,17 +592342,17 @@
    "67516402261de8f219f0374d38d42fa17b0a2096",
    "support"
   ],
   "interfaces/permissions.idl": [
    "7fec46d25cf175390524b681cdbec7b0b76c89b9",
    "support"
   ],
   "interfaces/picture-in-picture.idl": [
-   "4051a7f0ba28e984294ca32a5a2aef73b7f9a6bb",
+   "6feee4b6ea8d50e9ec572a6786c8fd9b4b8f80da",
    "support"
   ],
   "interfaces/pointerevents-extension.idl": [
    "26055736a27852501eba7da7f0cab7c57eceb652",
    "support"
   ],
   "interfaces/pointerevents.idl": [
    "5bf09b0822cbd8ecd479092842de1cd80b891269",

--- a/testing/web-platform/tests/interfaces/picture-in-picture.idl
+++ b/testing/web-platform/tests/interfaces/picture-in-picture.idl
@@ -17,14 +17,14 @@ partial interface Document {
 
   [NewObject] Promise<void> exitPictureInPicture();
 };
 
 partial interface DocumentOrShadowRoot {
   readonly attribute Element? pictureInPictureElement;
 };
 
-interface PictureInPictureWindow {
+interface PictureInPictureWindow : EventTarget {
   readonly attribute long width;
   readonly attribute long height;
 
   attribute EventHandler onresize;
 };