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diff --git a/testing/web-platform/tests/css/css-scroll-snap/parsing/scroll-margin-block-inline-valid.html b/testing/web-platform/tests/css/css-scroll-snap/parsing/scroll-margin-block-inline-valid.html
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+++ b/testing/web-platform/tests/css/css-scroll-snap/parsing/scroll-margin-block-inline-valid.html
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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Scroll Snap Test: scroll-margin-block, scroll-margin-inline with valid values</title>
+<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#margin-longhands-logical">
+<meta name="assert" content="scroll-margin-block, scroll-margin-inline support the full grammar '<length>{1,2}'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_valid_value("scroll-margin-block-start", "-10px");
+test_valid_value("scroll-margin-block-start", "calc(2em + 3ex)");
+
+test_valid_value("scroll-margin-block-end", "-10px");
+test_valid_value("scroll-margin-block-end", "calc(2em + 3ex)");
+
+test_valid_value("scroll-margin-inline-start", "-10px");
+test_valid_value("scroll-margin-inline-start", "calc(2em + 3ex)");
+
+test_valid_value("scroll-margin-inline-end", "-10px");
+test_valid_value("scroll-margin-inline-end", "calc(2em + 3ex)");
+
+
+test_valid_value("scroll-margin-block", "-10px");
+test_valid_value("scroll-margin-block", "calc(2em + 3ex)");
+test_valid_value("scroll-margin-block", "1px 2px");
+
+test_valid_value("scroll-margin-inline", "-10px");
+test_valid_value("scroll-margin-inline", "calc(2em + 3ex)");
+test_valid_value("scroll-margin-inline", "1px 2px");
+</script>
+</body>
+</html>