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diff --git a/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-integer-comma-list.html b/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-integer-comma-list.html
new file mode 100644
index 0000000000..3f4beaedf1
--- /dev/null
+++ b/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-integer-comma-list.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/utils.js"></script>
+<div id="target"></div>
+<script>
+
+animation_test({
+  syntax: "<integer>#",
+  inherits: false,
+  initialValue: "0"
+}, {
+  keyframes: ["100, 150", "200, 250"],
+  expected: "150, 200"
+}, 'Animating a custom property of type <integer>#');
+
+animation_test({
+  syntax: "<integer>#",
+  inherits: false,
+  initialValue: "100, 150"
+}, {
+  keyframes: "200, 250",
+  expected: "150, 200"
+}, 'Animating a custom property of type <integer># with a single keyframe');
+
+animation_test({
+  syntax: "<integer>#",
+  inherits: false,
+  initialValue: "50, 100"
+}, {
+  composite: "add",
+  keyframes: ["150, 200", "250, 300"],
+  expected: "250, 350"
+}, 'Animating a custom property of type <integer># with additivity');
+
+animation_test({
+  syntax: "<integer>#",
+  inherits: false,
+  initialValue: "50, 100"
+}, {
+  composite: "add",
+  keyframes: "150, 200",
+  expected: "125, 200"
+}, 'Animating a custom property of type <integer># with a single keyframe and additivity');
+
+animation_test({
+  syntax: "<integer>#",
+  inherits: false,
+  initialValue: "0, 0"
+}, {
+  iterationComposite: "accumulate",
+  keyframes: ["0, 50", "100, 100"],
+  expected: "250, 275"
+}, 'Animating a custom property of type <integer># with iterationComposite');
+
+discrete_animation_test("<integer>#", '10, 20', '30', 'Animating a custom property of type <integer># with different lengths is discrete');
+
+</script>