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diff --git a/js/src/tests/test262/intl402/Segmenter/prototype/segment/containing/out-of-bound-index.js b/js/src/tests/test262/intl402/Segmenter/prototype/segment/containing/out-of-bound-index.js
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+++ b/js/src/tests/test262/intl402/Segmenter/prototype/segment/containing/out-of-bound-index.js
@@ -0,0 +1,56 @@
+// |reftest| skip-if(!Intl.Segmenter) -- Intl.Segmenter is not enabled unconditionally
+// Copyright 2020 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%segmentsprototype%.containing
+description: Verifies the cases which the value of index turn into out of bound.
+info: |
+    %Segments.prototype%.containing ( index )
+
+    6. Let n be ? ToInteger(index).
+    7. If n < 0 or n ≥ len, return undefined.
+    8. Let startIndex be ! FindBoundary(segmenter, string, n, before).
+
+    ToInteger ( argument )
+    1. Let number be ? ToNumber(argument).
+    2. If number is NaN, +0, or -0, return +0.
+    4. Let integer be the Number value that is the same sign as number and whose magnitude is floor(abs(number)).
+    5. If integer is -0, return +0.
+    6. Return integer.
+
+    ToNumber ( argument )
+    String | See grammar and conversion algorithm below.
+
+features: [Intl.Segmenter]
+---*/
+
+const input = "a b c";
+const granularities = [undefined, "grapheme", "word", "sentence"];
+const index_to_out_of_bound = [
+    input.length,
+    input.length + 0.1,
+    -1,
+    -2,
+    "-1",
+    "-2",
+    "-1.1",
+    Infinity,
+    -Infinity,
+    "Infinity",
+    "-Infinity",
+    { toString(){ return "-1"; } },
+    { valueOf(){ return input.length; } },
+    { [Symbol.toPrimitive](){ return -1; } },
+];
+
+granularities.forEach(
+    function(granularity) {
+      const segmenter = new Intl.Segmenter(undefined, {granularity});
+      const segment = segmenter.segment(input);
+      index_to_out_of_bound.forEach(function(index) {
+        const result = segment.containing(index);
+        assert.sameValue(undefined, result);
+      });
+    });
+
+reportCompare(0, 0);