diff --git a/scroll-animations/css/timeline-scope-computed.tentative.html b/scroll-animations/css/timeline-scope-computed.tentative.html
new file mode 100644
index 00000000000000..814933f7266584
--- /dev/null
+++ b/scroll-animations/css/timeline-scope-computed.tentative.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7759">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<style>
+  #outer { timeline-scope: foo; }
+  #target { timeline-scope: bar; }
+</style>
+<div id="outer">
+  <div id="target"></div>
+</div>
+<script>
+test_computed_value('timeline-scope', 'initial', 'none');
+test_computed_value('timeline-scope', 'inherit', 'foo');
+test_computed_value('timeline-scope', 'unset', 'none');
+test_computed_value('timeline-scope', 'revert', 'none');
+test_computed_value('timeline-scope', 'none');
+test_computed_value('timeline-scope', 'test');
+test_computed_value('timeline-scope', 'foo, bar');
+test_computed_value('timeline-scope', 'bar, foo');
+test_computed_value('timeline-scope', 'a, b, c, D, e');
+
+test(() => {
+  let style = getComputedStyle(document.getElementById('target'));
+  assert_not_equals(Array.from(style).indexOf('timeline-scope'), -1);
+}, 'The timeline-scope property shows up in CSSStyleDeclaration enumeration');
+
+test(() => {
+  let style = document.getElementById('target').style;
+  assert_not_equals(style.cssText.indexOf('timeline-scope'), -1);
+}, 'The timeline-scope property shows up in CSSStyleDeclaration.cssText');
+
+</script>
diff --git a/scroll-animations/css/timeline-scope-parsing.tentative.html b/scroll-animations/css/timeline-scope-parsing.tentative.html
new file mode 100644
index 00000000000000..2885cb758ded6f
--- /dev/null
+++ b/scroll-animations/css/timeline-scope-parsing.tentative.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7759">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+<div id="target"></div>
+<script>
+
+test_valid_value('timeline-scope', 'initial');
+test_valid_value('timeline-scope', 'inherit');
+test_valid_value('timeline-scope', 'unset');
+test_valid_value('timeline-scope', 'revert');
+
+test_valid_value('timeline-scope', 'none');
+test_valid_value('timeline-scope', 'abc');
+test_valid_value('timeline-scope', '  abc', 'abc');
+test_valid_value('timeline-scope', 'aBc');
+test_valid_value('timeline-scope', 'foo, bar');
+test_valid_value('timeline-scope', 'bar, foo');
+test_valid_value('timeline-scope', 'auto');
+
+test_invalid_value('timeline-scope', 'none, abc');
+test_invalid_value('timeline-scope', '10px');
+test_invalid_value('timeline-scope', 'foo bar');
+test_invalid_value('timeline-scope', '"foo" "bar"');
+test_invalid_value('timeline-scope', 'rgb(1, 2, 3)');
+test_invalid_value('timeline-scope', '#fefefe');
+
+</script>
