1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/comments/hashbang/escaped-hash-u23.js b/js/src/tests/test262/language/comments/hashbang/escaped-hash-u23.js
new file mode 100644
index 0000000000..96859b568b
--- /dev/null
+++ b/js/src/tests/test262/language/comments/hashbang/escaped-hash-u23.js
@@ -0,0 +1,20 @@
+\u{23}!
+
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: pending
+description: >
+    Hashbang comments should not be allowed to have encoded characters \u{23}
+info: |
+    HashbangComment::
+      #! SingleLineCommentChars[opt]
+flags: [raw]
+negative:
+  phase: parse
+  type: SyntaxError
+features: [hashbang]
+---*/
+
+throw "Test262: This statement should not be evaluated.";