1 files changed, 22 insertions, 0 deletions
diff --git a/testing/web-platform/tests/web-animations/responsive/borderImageWidth.html b/testing/web-platform/tests/web-animations/responsive/borderImageWidth.html
new file mode 100644
index 0000000000..4b832889bd
--- /dev/null
+++ b/testing/web-platform/tests/web-animations/responsive/borderImageWidth.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div id='container'>
+<div id='element'></div>
+</div>
+
+<script>
+var element = document.getElementById('element');
+var container = document.getElementById('container');
+
+test(function() {
+    container.style.fontSize = '50px';
+    var player = element.animate([{borderImageWidth: '300px 30px'}, {borderImageWidth: '10em 1em'}], 10);
+    player.pause();
+    player.currentTime = 5;
+    container.style.fontSize = '10px';
+    assert_equals(getComputedStyle(element).borderImageWidth, '200px 20px');
+}, 'Border image width responsive to font size changes');
+
+</script>