diff --git a/html/semantics/forms/the-select-element/stylable-select/appearance-base-select-other-elements-ref.html b/html/semantics/forms/the-select-element/customizable-select/appearance-base-select-other-elements-ref.html
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rename from html/semantics/forms/the-select-element/stylable-select/appearance-base-select-other-elements-ref.html
rename to html/semantics/forms/the-select-element/customizable-select/appearance-base-select-other-elements-ref.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/appearance-base-select-other-elements.tentative.html b/html/semantics/forms/the-select-element/customizable-select/appearance-base-select-other-elements.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/appearance-base-select-other-elements.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/appearance-base-select-other-elements.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/border-rendering-ref.html b/html/semantics/forms/the-select-element/customizable-select/border-rendering-ref.html
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rename from html/semantics/forms/the-select-element/stylable-select/border-rendering-ref.html
rename to html/semantics/forms/the-select-element/customizable-select/border-rendering-ref.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/border-rendering.tentative.html b/html/semantics/forms/the-select-element/customizable-select/border-rendering.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/border-rendering.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/border-rendering.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/closed-listbox-rendering-ref.html b/html/semantics/forms/the-select-element/customizable-select/closed-listbox-rendering-ref.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/closed-listbox-rendering-ref.html
rename to html/semantics/forms/the-select-element/customizable-select/closed-listbox-rendering-ref.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/closed-listbox-rendering.tentative.html b/html/semantics/forms/the-select-element/customizable-select/closed-listbox-rendering.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/closed-listbox-rendering.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/closed-listbox-rendering.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/nested-options.tenative.html b/html/semantics/forms/the-select-element/customizable-select/nested-options.tenative.html
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rename from html/semantics/forms/the-select-element/stylable-select/nested-options.tenative.html
rename to html/semantics/forms/the-select-element/customizable-select/nested-options.tenative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/option-computed-style.tentative.html b/html/semantics/forms/the-select-element/customizable-select/option-computed-style.tentative.html
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rename from html/semantics/forms/the-select-element/stylable-select/option-computed-style.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/option-computed-style.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-accessibility-minimum-target-size.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-accessibility-minimum-target-size.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-accessibility-minimum-target-size.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-accessibility-minimum-target-size.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-datalist-options-idl.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-datalist-options-idl.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-datalist-options-idl.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-datalist-options-idl.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-disabled.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-disabled.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-disabled.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-disabled.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-fallback-datalist-animations.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-fallback-datalist-animations.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-fallback-datalist-animations.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-fallback-datalist-animations.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-keyboard-behavior.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-keyboard-behavior.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-keyboard-behavior.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-keyboard-behavior.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-mouse-behavior.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-mouse-behavior.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-mouse-behavior.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-mouse-behavior.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-option-hover-styles.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-option-hover-styles.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-option-hover-styles.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-option-hover-styles.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-parsing.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-parsing.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-parsing.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-parsing.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-size-multiple-new-content-ref.html b/html/semantics/forms/the-select-element/customizable-select/select-size-multiple-new-content-ref.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-size-multiple-new-content-ref.html
rename to html/semantics/forms/the-select-element/customizable-select/select-size-multiple-new-content-ref.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-size-multiple-new-content.tentative.html b/html/semantics/forms/the-select-element/customizable-select/select-size-multiple-new-content.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/select-size-multiple-new-content.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/select-size-multiple-new-content.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/selectedoption.tentative.html b/html/semantics/forms/the-select-element/customizable-select/selectedoption.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/selectedoption.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/selectedoption.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/selectedoptionelement-attr.tentative.html b/html/semantics/forms/the-select-element/customizable-select/selectedoptionelement-attr.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/selectedoptionelement-attr.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/selectedoptionelement-attr.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/switch-picker-appearance.tentative.html b/html/semantics/forms/the-select-element/customizable-select/switch-picker-appearance.tentative.html
similarity index 100%
rename from html/semantics/forms/the-select-element/stylable-select/switch-picker-appearance.tentative.html
rename to html/semantics/forms/the-select-element/customizable-select/switch-picker-appearance.tentative.html
diff --git a/html/semantics/forms/the-select-element/stylable-select/select-keyboard-hidden-option.tentative.html b/html/semantics/forms/the-select-element/stylable-select/select-keyboard-hidden-option.tentative.html
deleted file mode 100644
index b9d7cfbd3c0fc0..00000000000000
--- a/html/semantics/forms/the-select-element/stylable-select/select-keyboard-hidden-option.tentative.html
+++ /dev/null
@@ -1,48 +0,0 @@
-<!DOCTYPE html>
-<link rel=author href="mailto:jarhar@chromium.org">
-<link rel=help href="https://github.com/whatwg/html/issues/9799">
-<link rel=help href="https://issues.chromium.org/issues/360357707">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="/resources/testdriver.js"></script>
-<script src="/resources/testdriver-vendor.js"></script>
-<script src="/resources/testdriver-actions.js"></script>
-
-<style>
-select, select::picker(select) {
-  appearance: base-select;
-}
-</style>
-
-<select>
-  <option hidden>hidden one</option>
-  <option class=two>two</option>
-  <option class=three>three</option>
-</select>
-
-<script>
-const ArrowDown = '\uE015';
-
-promise_test(async () => {
-  const select = document.querySelector('select');
-  const hiddenOption = document.querySelector('option[hidden]');
-  const optionTwo = document.querySelector('option.two');
-  const optionThree = document.querySelector('option.three');
-
-  select.focus();
-  await test_driver.send_keys(select, ' ');
-  assert_true(select.matches(':open'),
-    'Select should open after pressing spacebar.');
-
-  assert_equals(document.activeElement, optionTwo,
-    'The first visible <option> should get focused after opening picker.');
-
-  await (new test_driver.Actions()
-    .keyDown(ArrowDown)
-    .keyUp(ArrowDown))
-    .send();
-
-  assert_equals(document.activeElement, optionThree,
-    'The second visible <option> should get focused after arrowdown.');
-}, 'Hidden <option>s should not get initial focus.');
-</script>