diff --git a/html/semantics/forms/the-select-element/customizable-select/border-rendering-ref.html b/html/semantics/forms/the-select-element/customizable-select/border-rendering-ref.html
deleted file mode 100644
index 61c68160585f80..00000000000000
--- a/html/semantics/forms/the-select-element/customizable-select/border-rendering-ref.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-
-<style>
-.border-wrapper {
-  border: 7px solid cornflowerblue;
-  display: inline-block;
-}
-
-select {
-  appearance: base-select;
-}
-</style>
-
-<div class="border-wrapper">
-  <select>
-    <option>Option 1</option>
-  </select>
-</div>
diff --git a/html/semantics/forms/the-select-element/customizable-select/border-rendering.tentative.html b/html/semantics/forms/the-select-element/customizable-select/border-rendering.tentative.html
deleted file mode 100644
index 3265143624b3fe..00000000000000
--- a/html/semantics/forms/the-select-element/customizable-select/border-rendering.tentative.html
+++ /dev/null
@@ -1,14 +0,0 @@
-<!DOCTYPE html>
-
-<link rel=match href="border-rendering-ref.html">
-
-<style>
-select {
-  appearance: base-select;
-  border: 7px solid cornflowerblue;
-}
-</style>
-
-<select>
-  <option>Option 1</option>
-</select>
