1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/module-code/early-dup-export-as-star-as.js b/js/src/tests/test262/language/module-code/early-dup-export-as-star-as.js
new file mode 100644
index 0000000000..ad351b5124
--- /dev/null
+++ b/js/src/tests/test262/language/module-code/early-dup-export-as-star-as.js
@@ -0,0 +1,20 @@
+// |reftest| error:SyntaxError module
+// Copyright (C) 2018 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-module-semantics-static-semantics-early-errors
+description: >
+    It is a Syntax Error if the ExportedNames of ModuleItemList contains any
+    duplicate entries.
+flags: [module]
+features: [export-star-as-namespace-from-module]
+negative:
+  phase: parse
+  type: SyntaxError
+---*/
+
+$DONOTEVALUATE();
+
+var x;
+export { x as z };
+export * as z from './early-dup-export-as-star-as.js';