diff --git a/test/built-ins/Array/prototype/unshift/read-only-property.js b/test/built-ins/Array/prototype/unshift/read-only-property.js
new file mode 100644
index 00000000000..c4ec9a9e54e
--- /dev/null
+++ b/test/built-ins/Array/prototype/unshift/read-only-property.js
@@ -0,0 +1,24 @@
+// Copyright (C) 2026 Garham Lee. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.unshift
+description: >
+    Array.prototype.unshift throws TypeError when a property is read-only.
+info: |
+    Array.prototype.unshift ( ..._items_ )
+
+    1. Let _O_ be ? ToObject(*this* value).
+    2. Let _len_ be ? LengthOfArrayLike(_O_).
+    3. Let _argCount_ be the number of elements in _items_.
+    4. If _argCount_ > 0, then
+        a. If _len_ + _argCount_ > 2<sup>53</sup> - 1, throw a *TypeError* exception.
+        b. Let _k_ be _len_.
+        c. Repeat, while _k_ > 0,
+        d. Let _j_ be *+0*<sub>𝔽</sub>.
+        e. For each element _E_ of _items_, do
+            i. Perform ? Set(_O_, ! ToString(_j_), _E_, *true*).
+---*/
+assert.throws(TypeError, function () {
+    Array.prototype.unshift.call({get 0 () {}}, 0)
+}, "Array.prototype.unshift throws TypeError when a property is read-only.")