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diff --git a/testing/web-platform/tests/css/css-animations/parsing/animation-invalid.html b/testing/web-platform/tests/css/css-animations/parsing/animation-invalid.html
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+++ b/testing/web-platform/tests/css/css-animations/parsing/animation-invalid.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Animations: parsing animation with invalid values</title>
+<link rel="help" href="https://drafts.csswg.org/css-animations/#propdef-animation">
+<meta name="assert" content="animation supports only the grammar '<single-animation> #'.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+</head>
+<body>
+<script>
+test_invalid_value("animation", "1s 2s 3s");
+test_invalid_value("animation", "-1s -2s");
+
+test_invalid_value("animation", "steps(1) steps(2)");
+
+test_invalid_value("animation", "1 2");
+
+test_invalid_value("animation", "reverse alternate alternate-reverse anim");
+
+test_invalid_value("animation", "both backwards forwards anim");
+
+test_invalid_value("animation", "paused running paused anim");
+
+test_invalid_value("animation", "anim1 timeline1 anim2");
+</script>
+</body>
+</html>