1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/expressions/in/rhs-yield-absent-strict-strict.js b/js/src/tests/test262/language/expressions/in/rhs-yield-absent-strict-strict.js
new file mode 100644
index 0000000000..cac0db7e1d
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/in/rhs-yield-absent-strict-strict.js
@@ -0,0 +1,22 @@
+// |reftest| error:SyntaxError
+'use strict';
+// Copyright 2021 the V8 project authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Parsing observes the `Yield` production parameter when absent (within strict mode)
+info: |
+  Syntax
+    RelationalExpression[In, Yield, Await]:
+    [...]
+    [+In] RelationalExpression[+In, ?Yield, ?Await] in ShiftExpression[?Yield, ?Await]
+esid: sec-relational-operators
+negative:
+  phase: parse
+  type: SyntaxError
+flags: [onlyStrict]
+---*/
+
+$DONOTEVALUATE();
+
+'' in (yield);