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diff --git a/js/src/tests/test262/language/literals/regexp/early-err-modifiers-should-not-case-fold-m.js b/js/src/tests/test262/language/literals/regexp/early-err-modifiers-should-not-case-fold-m.js
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+++ b/js/src/tests/test262/language/literals/regexp/early-err-modifiers-should-not-case-fold-m.js
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+// |reftest| skip error:SyntaxError -- regexp-modifiers is not supported
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Code points other than "i", "m", "s" should not be case folded to "i", "m", or "s" (regular expression flags)
+esid: sec-patterns-static-semantics-early-errors
+features: [regexp-modifiers]
+negative:
+ phase: parse
+ type: SyntaxError
+info: |
+ Atom :: ( ? RegularExpresisonFlags : Disjunction )
+ It is a Syntax Error if the source text matched by RegularExpressionFlags contains any code points other than "i", "m", "s", or if it contains the same code point more than once.
+
+---*/
+
+$DONOTEVALUATE();
+
+/(?M:a)//*{ global-modifiers }*/;