diff --git a/dom/animation/test/crashtests/1323119-1.html b/dom/animation/test/crashtests/1323119-1.html
new file mode 100644
index 000000000000..fd979822b826
--- /dev/null
+++ b/dom/animation/test/crashtests/1323119-1.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<body>
+<script>
+addEventListener("DOMContentLoaded", function() {
+  let a = document.createElement("th");
+  document.documentElement.appendChild(a);
+  a.animate([{"mask": "repeat-y "}], 484);
+  document.documentElement.classList.remove("reftest-wait");
+});
+</script>
+</body>
+</html>
diff --git a/dom/animation/test/crashtests/crashtests.list b/dom/animation/test/crashtests/crashtests.list
index c98aa74f0215..ec5261c0f22c 100644
--- a/dom/animation/test/crashtests/crashtests.list
+++ b/dom/animation/test/crashtests/crashtests.list
@@ -20,6 +20,7 @@ pref(dom.animations-api.core.enabled,true) load 1322291-1.html
 pref(dom.animations-api.core.enabled,true) load 1322291-2.html
 pref(dom.animations-api.core.enabled,true) load 1323114-1.html
 pref(dom.animations-api.core.enabled,true) load 1323114-2.html
+pref(dom.animations-api.core.enabled,true) load 1323119-1.html
 pref(dom.animations-api.core.enabled,true) load 1324554-1.html
 pref(dom.animations-api.core.enabled,true) load 1325193-1.html
 pref(dom.animations-api.core.enabled,true) load 1330190-1.html
