diff --git a/accessible/tests/crashtests/893515.html b/accessible/tests/crashtests/893515.html
new file mode 100644
index 000000000000..a9cc12c928b8
--- /dev/null
+++ b/accessible/tests/crashtests/893515.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<script>
+function boom()
+{
+  document.designMode = 'on';
+  var otherDoc = document.implementation.createDocument("", "", null);
+  otherDoc.adoptNode(document.getElementById("t"));
+}
+</script>
+</head>
+<body onload="setTimeout(boom, 0);"><textarea id="t"></textarea></body>
+</html>
diff --git a/accessible/tests/crashtests/crashtests.list b/accessible/tests/crashtests/crashtests.list
index 78d27283b776..251526d0feda 100644
--- a/accessible/tests/crashtests/crashtests.list
+++ b/accessible/tests/crashtests/crashtests.list
@@ -1,6 +1,7 @@
 load 448064.xhtml # This test instantiates a11y, so be careful about adding tests before it
 load 471493.xul
 asserts-if(!browserIsRemote,2) load 884202.html
+load 893515.html
 
 # last_test_to_unload_testsuite.xul MUST be the last test in the list because it
 # is responsible for shutting down accessibility service affecting later tests.
