1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js b/js/src/tests/test262/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js
new file mode 100644
index 0000000000..7d3c0d49ba
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/prototype/unicodeSets/breaking-change-from-u-to-v-26.js
@@ -0,0 +1,20 @@
+// |reftest| error:SyntaxError
+// Copyright 2023 Mathias Bynens. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+author: Mathias Bynens
+description: >
+  Some previously valid patterns with the `u` flag are now expected to
+  throw an early SyntaxError with the `v` flag.
+  https://github.com/tc39/proposal-regexp-v-flag#how-is-the-v-flag-different-from-the-u-flag
+esid: sec-parsepattern
+negative:
+  phase: parse
+  type: SyntaxError
+features: [regexp-v-flag]
+---*/
+
+$DONOTEVALUATE();
+
+/[~~]/v;