diff --git a/testing/web-platform/tests/interfaces/ResizeObserver.idl b/testing/web-platform/tests/interfaces/resize-observer.idl
similarity index 100%
rename from testing/web-platform/tests/interfaces/ResizeObserver.idl
rename to testing/web-platform/tests/interfaces/resize-observer.idl
diff --git a/testing/web-platform/tests/resize-observer/idlharness.window.js b/testing/web-platform/tests/resize-observer/idlharness.window.js
index 7a8cba55a4b7d..cc0098ab80ab2 100644
--- a/testing/web-platform/tests/resize-observer/idlharness.window.js
+++ b/testing/web-platform/tests/resize-observer/idlharness.window.js
@@ -7,7 +7,9 @@ idl_test
 (
 [
 '
-ResizeObserver
+resize
+-
+observer
 '
 ]
 [