diff --git a/intl/uconv/crashtests/crashtests.list b/intl/uconv/crashtests/crashtests.list
index 5d92626324ad..6c54a699c158 100644
--- a/intl/uconv/crashtests/crashtests.list
+++ b/intl/uconv/crashtests/crashtests.list
@@ -1 +1,2 @@
 load 563618.html
+load omt-non-utf-8-jsurl.html
diff --git a/intl/uconv/crashtests/omt-non-utf-8-jsurl.html b/intl/uconv/crashtests/omt-non-utf-8-jsurl.html
new file mode 100644
index 000000000000..033e38a28098
--- /dev/null
+++ b/intl/uconv/crashtests/omt-non-utf-8-jsurl.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<head>
+  <meta charset=iso-8859-1><!-- must be non-UTF-8 -->
+  <title>Test for off the main thread non-UTF-8 javascript: URL</title>
+</head>
+<body>
+<script>
+new Worker("javascript:foo").onerror = () => {
+  document.documentElement.className = "";
+};
+</script>
+</body>
+</html>
