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diff --git a/js/src/tests/non262/Iterator/prototype/flatMap/close-iterator-when-inner-next-throws.js b/js/src/tests/non262/Iterator/prototype/flatMap/close-iterator-when-inner-next-throws.js
new file mode 100644
index 0000000000..a8f70497f7
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/flatMap/close-iterator-when-inner-next-throws.js
@@ -0,0 +1,45 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+//
+//
+/*---
+esid: pending
+description: %Iterator.prototype%.flatMap closes the iterator when innerNext throws.
+info: >
+  Iterator Helpers proposal 2.1.5.7
+  1. Repeat,
+    ...
+    i. Repeat, while innerAlive is true,
+      i. Let innerNext be IteratorNext(innerIterator).
+      ii. IfAbruptCloseIterator(innerNext, iterated).
+features: [iterator-helpers]
+---*/
+
+class TestIterator extends Iterator {
+  next() {
+    return {done: false, value: 0};
+  }
+
+  closed = false;
+  return() {
+    this.closed = true;
+    return {done: true};
+  }
+}
+
+class TestError extends Error {}
+class InnerIterator extends Iterator {
+  next() {
+    throw new TestError();
+  }
+}
+
+const iter = new TestIterator();
+const mapped = iter.flatMap(x => new InnerIterator());
+
+assertEq(iter.closed, false);
+assertThrowsInstanceOf(() => mapped.next(), TestError);
+assertEq(iter.closed, true);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);