diff --git a/features.txt b/features.txt
index 257f379ee658f006a17b7868ce5259353ff84f9a..a0b1565d3d4854d5369702a227468db0bc90db5a 100644
--- a/features.txt
+++ b/features.txt
@@ -77,6 +77,10 @@ numeric-separator-literal
 String.prototype.matchAll
 Symbol.matchAll
 
+# Symbol.prototype.description
+# https://github.com/tc39/proposal-symbol-description
+Symbol.prototype.description
+
 # ECMAScript ⊃ JSON
 # https://github.com/tc39/proposal-json-superset
 json-superset
diff --git a/test/built-ins/Symbol/prototype/description/descriptor.js b/test/built-ins/Symbol/prototype/description/descriptor.js
new file mode 100644
index 0000000000000000000000000000000000000000..0b3d2db3c32b4a7702c92ea3e4a5c0feb189cc1d
--- /dev/null
+++ b/test/built-ins/Symbol/prototype/description/descriptor.js
@@ -0,0 +1,19 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-symbol.prototype.description
+description: >
+    Test the descriptor of Symbol.prototype.description.
+info: |
+    `Symbol.prototype.description` is an accessor property whose
+    set accessor function is undefined.
+features: [Symbol.prototype.description]
+---*/
+
+const desc = Object.getOwnPropertyDescriptor(Symbol.prototype, 'description');
+assert.sameValue(typeof desc.get, 'function');
+assert.sameValue(desc.set, undefined);
+assert.sameValue(desc.writable, undefined);
+assert.sameValue(desc.enumerable, false);
+assert.sameValue(desc.configurable, true);
diff --git a/test/built-ins/Symbol/prototype/description/get.js b/test/built-ins/Symbol/prototype/description/get.js
new file mode 100644
index 0000000000000000000000000000000000000000..64c18dced0f3838f1958e670729b46589a08b9bf
--- /dev/null
+++ b/test/built-ins/Symbol/prototype/description/get.js
@@ -0,0 +1,21 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-symbol.prototype.description
+description: >
+    Test the get accessor function of Symbol.prototype.description.
+info: |
+    1. Let s be the this value.
+    2. Let sym be ? thisSymbolValue(s).
+    3. Return sym.[[Description]].
+features: [Symbol.prototype.description]
+---*/
+
+const symbol = Symbol('test');
+assert.sameValue(symbol.description, 'test');
+assert.sameValue(symbol.hasOwnProperty('description'), false);
+
+const empty = Symbol();
+assert.sameValue(empty.description, undefined);
+assert.sameValue(empty.hasOwnProperty('description'), false);
diff --git a/test/built-ins/Symbol/prototype/description/this-val-non-symbol.js b/test/built-ins/Symbol/prototype/description/this-val-non-symbol.js
new file mode 100644
index 0000000000000000000000000000000000000000..89e222d444d052bb23c917b79d2988702bff7326
--- /dev/null
+++ b/test/built-ins/Symbol/prototype/description/this-val-non-symbol.js
@@ -0,0 +1,42 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-symbol.prototype.description
+description: >
+    Behavior when `this` value is an object without a [[SymbolData]] internal
+    slot.
+info: |
+    1. Let s be the this value.
+    2. Let sym be ? thisSymbolValue(s).
+    3. Return sym.[[Description]].
+features: [Symbol.prototype.description]
+---*/
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call(null);
+});
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call(123);
+});
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call('test');
+});
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call(true);
+});
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call(undefined);
+});
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call(new Proxy({}, {}));
+});
+
+assert.throws(TypeError, function() {
+  Symbol.prototype.description.call({});
+});
diff --git a/test/built-ins/Symbol/prototype/description/wrapper.js b/test/built-ins/Symbol/prototype/description/wrapper.js
new file mode 100644
index 0000000000000000000000000000000000000000..4acb78fe6abc7c2b6177459415dca1d4035efda7
--- /dev/null
+++ b/test/built-ins/Symbol/prototype/description/wrapper.js
@@ -0,0 +1,21 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-symbol.prototype.description
+description: >
+    Test Symbol.prototype.description called on wrapper objects.
+info: |
+    1. Let s be the this value.
+    2. Let sym be ? thisSymbolValue(s).
+    3. Return sym.[[Description]].
+features: [Symbol.prototype.description]
+---*/
+
+const symbol = Object(Symbol('test'));
+assert.sameValue(symbol.description, 'test');
+assert.sameValue(symbol.hasOwnProperty('description'), false);
+
+const empty = Object(Symbol());
+assert.sameValue(empty.description, undefined);
+assert.sameValue(empty.hasOwnProperty('description'), false);