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diff --git a/js/src/tests/test262/built-ins/Date/shell.js b/js/src/tests/test262/built-ins/Date/shell.js
new file mode 100644
index 0000000000..d7ea820221
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+++ b/js/src/tests/test262/built-ins/Date/shell.js
@@ -0,0 +1,82 @@
+// GENERATED, DO NOT EDIT
+// file: assertRelativeDateMs.js
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Verify that the given date object's Number representation describes the
+    correct number of milliseconds since the Unix epoch relative to the local
+    time zone (as interpreted at the specified date).
+defines: [assertRelativeDateMs]
+---*/
+
+/**
+ * @param {Date} date
+ * @param {Number} expectedMs
+ */
+function assertRelativeDateMs(date, expectedMs) {
+  var actualMs = date.valueOf();
+  var localOffset = date.getTimezoneOffset() * 60000;
+
+  if (actualMs - localOffset !== expectedMs) {
+    throw new Test262Error(
+      'Expected ' + date + ' to be ' + expectedMs +
+      ' milliseconds from the Unix epoch'
+    );
+  }
+}
+
+// file: dateConstants.js
+// Copyright (C) 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: |
+    Collection of date-centric values
+defines:
+  - date_1899_end
+  - date_1900_start
+  - date_1969_end
+  - date_1970_start
+  - date_1999_end
+  - date_2000_start
+  - date_2099_end
+  - date_2100_start
+  - start_of_time
+  - end_of_time
+---*/
+
+var date_1899_end = -2208988800001;
+var date_1900_start = -2208988800000;
+var date_1969_end = -1;
+var date_1970_start = 0;
+var date_1999_end = 946684799999;
+var date_2000_start = 946684800000;
+var date_2099_end = 4102444799999;
+var date_2100_start = 4102444800000;
+
+var start_of_time = -8.64e15;
+var end_of_time = 8.64e15;
+
+// file: isConstructor.js
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: |
+    Test if a given function is a constructor function.
+defines: [isConstructor]
+features: [Reflect.construct]
+---*/
+
+function isConstructor(f) {
+    if (typeof f !== "function") {
+      throw new Test262Error("isConstructor invoked with a non-function value");
+    }
+
+    try {
+        Reflect.construct(function(){}, [], f);
+    } catch (e) {
+        return false;
+    }
+    return true;
+}