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diff --git a/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-integer.html b/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-integer.html
new file mode 100644
index 0000000000..400308a92e
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+++ b/testing/web-platform/tests/css/css-properties-values-api/animation/custom-property-animation-integer.html
@@ -0,0 +1,57 @@
+<!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, 200],
+  expected: "150"
+}, 'Animating a custom property of type <integer>');
+
+animation_test({
+  syntax: "<integer>",
+  inherits: false,
+  initialValue: 100
+}, {
+  keyframes: 200,
+  expected: "150"
+}, 'Animating a custom property of type <integer> with a single keyframe');
+
+animation_test({
+  syntax: "<integer>",
+  inherits: false,
+  initialValue: 100
+}, {
+  composite: "add",
+  keyframes: [200, 300],
+  expected: "350"
+}, 'Animating a custom property of type <integer> with additivity');
+
+animation_test({
+  syntax: "<integer>",
+  inherits: false,
+  initialValue: 100
+}, {
+  composite: "add",
+  keyframes: 300,
+  expected: "250"
+}, 'Animating a custom property of type <integer> with a single keyframe and additivity');
+
+animation_test({
+  syntax: "<integer>",
+  inherits: false,
+  initialValue: 100
+}, {
+  iterationComposite: "accumulate",
+  keyframes: [0, 100],
+  expected: "250"
+}, 'Animating a custom property of type <integer> with iterationComposite');
+
+</script>