diff --git a/testing/web-platform/meta/audio-output/HTMLMediaElement-sinkId-idl.html.ini b/testing/web-platform/meta/audio-output/HTMLMediaElement-sinkId-idl.html.ini
deleted file mode 100644
index 3a8aa6669e5e..000000000000
--- a/testing/web-platform/meta/audio-output/HTMLMediaElement-sinkId-idl.html.ini
+++ /dev/null
@@ -1,25 +0,0 @@
-[HTMLMediaElement-sinkId-idl.html]
-  [HTMLMediaElement interface: attribute sinkId]
-    expected: FAIL
-
-  [HTMLMediaElement interface: operation setSinkId(DOMString)]
-    expected: FAIL
-
-  [HTMLMediaElement interface: audio must inherit property "sinkId" with the proper type]
-    expected: FAIL
-
-  [HTMLMediaElement interface: audio must inherit property "setSinkId(DOMString)" with the proper type]
-    expected: FAIL
-
-  [HTMLMediaElement interface: calling setSinkId(DOMString) on audio with too few arguments must throw TypeError]
-    expected: FAIL
-
-  [HTMLMediaElement interface: video must inherit property "sinkId" with the proper type]
-    expected: FAIL
-
-  [HTMLMediaElement interface: video must inherit property "setSinkId(DOMString)" with the proper type]
-    expected: FAIL
-
-  [HTMLMediaElement interface: calling setSinkId(DOMString) on video with too few arguments must throw TypeError]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/audio-output/idlharness.window.js.ini b/testing/web-platform/meta/audio-output/idlharness.window.js.ini
new file mode 100644
index 000000000000..d7192f109874
--- /dev/null
+++ b/testing/web-platform/meta/audio-output/idlharness.window.js.ini
@@ -0,0 +1,7 @@
+[idlharness.window.html]
+  [HTMLMediaElement interface: attribute sinkId]
+    expected: FAIL
+
+  [HTMLMediaElement interface: operation setSinkId(DOMString)]
+    expected: FAIL
+