diff --git a/testing/web-platform/tests/clipboard-apis/data-transfer-file-list-change-reference-updates.html b/testing/web-platform/tests/clipboard-apis/data-transfer-file-list-change-reference-updates.html
new file mode 100644
index 000000000000..89d2054abe7f
--- /dev/null
+++ b/testing/web-platform/tests/clipboard-apis/data-transfer-file-list-change-reference-updates.html
@@ -0,0 +1,164 @@
+<
+!
+DOCTYPE
+html
+>
+<
+meta
+charset
+=
+utf
+-
+8
+>
+<
+title
+>
+Any
+JS
+reference
+DataTransfer
+.
+files
+should
+contain
+latest
+changes
+done
+to
+DataTransfer
+.
+items
+<
+/
+title
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharness
+.
+js
+"
+>
+<
+/
+script
+>
+<
+script
+src
+=
+"
+/
+resources
+/
+testharnessreport
+.
+js
+"
+>
+<
+/
+script
+>
+<
+input
+type
+=
+file
+multiple
+>
+<
+script
+>
+test
+(
+(
+)
+=
+>
+{
+const
+dt
+=
+new
+DataTransfer
+(
+)
+;
+const
+filelist
+=
+dt
+.
+files
+;
+assert_equals
+(
+filelist
+.
+length
+0
+'
+Initial
+filelist
+should
+be
+empty
+'
+)
+;
+dt
+.
+items
+.
+add
+(
+new
+File
+(
+[
+0
+]
+'
+test
+'
+)
+)
+;
+assert_equals
+(
+filelist
+.
+length
+1
+'
+Filelist
+should
+reflect
+the
+changes
+done
+to
+items
+'
+)
+;
+}
+'
+expect
+changed
+contents
+'
+)
+;
+<
+/
+script
+>