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diff --git a/testing/web-platform/tests/css/css-typed-om/stylevalue-normalization/normalize-tokens.tentative.html b/testing/web-platform/tests/css/css-typed-om/stylevalue-normalization/normalize-tokens.tentative.html
new file mode 100644
index 0000000000..c83e093e62
--- /dev/null
+++ b/testing/web-platform/tests/css/css-typed-om/stylevalue-normalization/normalize-tokens.tentative.html
@@ -0,0 +1,71 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Normalization of raw CSS tokens tests</title>
+<link rel="help" href="https://drafts.css-houdini.org/css-typed-om-1/#normalize-tokens">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/testhelper.js"></script>
+<body>
+<script>
+'use strict';
+
+function assert_string_normalizes_to(test, property, str, expected) {
+  // From string
+  assert_style_value_equals(CSSStyleValue.parse(property, str), expected);
+  // From CSSOM
+  assert_style_value_equals(
+    createInlineStyleMap(test, property + ':' + str).get(property),
+    expected
+  );
+}
+
+const gTestCases = [
+  {
+    value: 'var(--A)',
+    expectedResult: [
+      new CSSVariableReferenceValue('--A'),
+    ]
+  },
+  {
+    value: 'var(--A, 1em)',
+    expectedResult: [
+      new CSSVariableReferenceValue('--A', new CSSUnparsedValue([' 1em'])),
+    ]
+  },
+  {
+    value: 'var(--A, var(--B))',
+    expectedResult: [
+      new CSSVariableReferenceValue('--A', new CSSUnparsedValue([' ', new CSSVariableReferenceValue('--B')])),
+    ]
+  },
+  {
+    value: 'calc(42px + var(--foo, 15em) + var(--bar, var(--far) + 15px))',
+    expectedResult: [
+      'calc(42px + ',
+      new CSSVariableReferenceValue('--foo', new CSSUnparsedValue([' 15em'])),
+      ' + ',
+      new CSSVariableReferenceValue('--bar', new CSSUnparsedValue([' ', new CSSVariableReferenceValue('--far'), ' + 15px'])),
+      ')',
+    ]
+  },
+];
+
+for (const {value, expectedResult} of gTestCases) {
+  test(t => {
+    assert_string_normalizes_to(t, 'color', value, new CSSUnparsedValue(expectedResult));
+  }, 'Normalizing "' + value + '" on a CSS property returns correct CSSUnparsedValue');
+
+  test(t => {
+    assert_string_normalizes_to(t, 'margin', value, new CSSUnparsedValue(expectedResult));
+  }, 'Normalizing "' + value + '" on a shorthand returns correct CSSUnparsedValue');
+
+  test(t => {
+    assert_string_normalizes_to(t, 'transition-duration', value, new CSSUnparsedValue(expectedResult));
+  }, 'Normalizing "' + value + '" on a list-valued property returns correct CSSUnparsedValue');
+
+  test(t => {
+    assert_string_normalizes_to(t, '--X', value, new CSSUnparsedValue(expectedResult));
+  }, 'Normalizing "' + value + '" on a custom property returns correct CSSUnparsedValue');
+}
+
+</script>