1 files changed, 28 insertions, 0 deletions
diff --git a/testing/web-platform/tests/svg/animations/pruning-first-interval.html b/testing/web-platform/tests/svg/animations/pruning-first-interval.html
new file mode 100644
index 0000000000..5a1d1463be
--- /dev/null
+++ b/testing/web-platform/tests/svg/animations/pruning-first-interval.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<title>Timed element not active after first interval active duration changes to unresolved</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<svg>
+  <rect width="100" height="100" fill="green">
+    <set attributeName="fill" to="red" fill="freeze"
+         begin="click" end="click" dur="100ms" repeatCount="indefinite"/>
+  </rect>
+</svg>
+<script>
+  async_test(function(t) {
+    let set = document.querySelector('set');
+    window.onload = t.step_func(function() {
+      t.step_timeout(function() {
+        set.setAttribute('begin', '-100ms');
+        set.setAttribute('begin', 'click');
+        set.parentNode.appendChild(set);
+        set.setAttribute('end', '-100ms');
+        set.setAttribute('end', 'click');
+        window.requestAnimationFrame(t.step_func_done(function() {
+          let target = set.targetElement;
+          assert_equals(getComputedStyle(target).fill, 'rgb(0, 128, 0)');
+        }));
+      }, 0);
+    });
+  });
+</script>