1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/static-init-invalid-lex-dup.js b/js/src/tests/test262/language/statements/class/static-init-invalid-lex-dup.js
new file mode 100644
index 0000000000..2d750737cd
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/static-init-invalid-lex-dup.js
@@ -0,0 +1,25 @@
+// |reftest| error:SyntaxError
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-class-definitions-static-semantics-early-errors
+description: Block cannot declare duplicate lexically-scoped bindings
+info: |
+  ClassStaticBlockBody : ClassStaticBlockStatementList
+
+  - It is a Syntax Error if the LexicallyDeclaredNames of
+    ClassStaticBlockStatementList contains any duplicate entries.
+negative:
+  phase: parse
+  type: SyntaxError
+features: [class-static-block]
+---*/
+
+$DONOTEVALUATE();
+
+class C {
+  static {
+    let x;
+    let x;
+  }
+}